Fermi/Large Area Telescope Discovery of Gamma-Ray Emission from a Relativistic Jet in the Narrow-Line Quasar PMN J0948+0022
Abstract
In this paper, we report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope of high-energy γ-ray emission from the peculiar quasar PMN J0948+0022 (z = 0.5846). The optical spectrum of this object exhibits rather narrow Hβ (FWHM(Hβ) ~1500 km s–1), weak forbidden lines, and is therefore classified as a narrow-line type I quasar. This class of objects is thought to have relatively small black hole mass and to accrete at a high Eddington ratio. The radio loudness and variability of the compact radio core indicate the presence of a relativistic jet. Quasi-simultaneous radio/optical/X-ray and γ-ray observations are presented. Both radio and γ-ray emissions (observed over five months) are strongly variable. The simultaneous optical and X-ray data from Swift show a blue continuum attributed to the accretion disk and a hard X-ray spectrum attributed to the jet. The resulting broadband spectral energy distribution (SED) and, in particular, the γ-ray spectrum measured by Fermi are similar to those of more powerful Flat-Spectrum Radio Quasars (FSRQs). A comparison of the radio and γ-ray characteristics of PMN J0948+0022 with the other blazars detected by LAT shows that this source has a relatively low radio and γ-ray power withmore »
- Authors:
- more »
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- Fermi/LAT Collaboration
- OSTI Identifier:
- 1357447
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 699; Journal Issue: 2; Journal ID: ISSN 0004-637X
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; active galaxies; gamma ray observations; quasars
Citation Formats
Abdo, A. A., Ackermann, M., Ajello, M., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Battelino, M., Baughman, B. M., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Collmar, W., Conrad, J., Costamante, L., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Focke, W. B., Foschini, L., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hartman, R. C., Hayashida, M., Hays, E., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuehn, F., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pearson, T. J., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Reposeur, T., Richards, J. L., Ritz, S., Rodriguez, A. Y., Romani, R. W., Ryde, F., Sadrozinski, H. F. -W., Sambruna, R., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Schalk, T. L., Sgrò, C., Smith, D. A., Spandre, G., Spinelli, P., Starck, J. -L., Stevenson, M., Strickman, M. S., Suson, D. J., Tagliaferri, G., Takahashi, H., Tanaka, T., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vilchez, N., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Ziegler, M., Ghisellini, G., Maraschi, L., Tavecchio, F., and Angelakis, E. Fermi/Large Area Telescope Discovery of Gamma-Ray Emission from a Relativistic Jet in the Narrow-Line Quasar PMN J0948+0022. United States: N. p., 2009.
Web. doi:10.1088/0004-637X/699/2/976.
Abdo, A. A., Ackermann, M., Ajello, M., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Battelino, M., Baughman, B. M., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Collmar, W., Conrad, J., Costamante, L., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Focke, W. B., Foschini, L., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hartman, R. C., Hayashida, M., Hays, E., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuehn, F., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pearson, T. J., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Reposeur, T., Richards, J. L., Ritz, S., Rodriguez, A. Y., Romani, R. W., Ryde, F., Sadrozinski, H. F. -W., Sambruna, R., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Schalk, T. L., Sgrò, C., Smith, D. A., Spandre, G., Spinelli, P., Starck, J. -L., Stevenson, M., Strickman, M. S., Suson, D. J., Tagliaferri, G., Takahashi, H., Tanaka, T., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vilchez, N., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Ziegler, M., Ghisellini, G., Maraschi, L., Tavecchio, F., & Angelakis, E. Fermi/Large Area Telescope Discovery of Gamma-Ray Emission from a Relativistic Jet in the Narrow-Line Quasar PMN J0948+0022. United States. https://doi.org/10.1088/0004-637X/699/2/976
Abdo, A. A., Ackermann, M., Ajello, M., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Battelino, M., Baughman, B. M., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Collmar, W., Conrad, J., Costamante, L., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Focke, W. B., Foschini, L., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hartman, R. C., Hayashida, M., Hays, E., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuehn, F., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pearson, T. J., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Reposeur, T., Richards, J. L., Ritz, S., Rodriguez, A. Y., Romani, R. W., Ryde, F., Sadrozinski, H. F. -W., Sambruna, R., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Schalk, T. L., Sgrò, C., Smith, D. A., Spandre, G., Spinelli, P., Starck, J. -L., Stevenson, M., Strickman, M. S., Suson, D. J., Tagliaferri, G., Takahashi, H., Tanaka, T., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vilchez, N., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Ziegler, M., Ghisellini, G., Maraschi, L., Tavecchio, F., and Angelakis, E. Wed .
"Fermi/Large Area Telescope Discovery of Gamma-Ray Emission from a Relativistic Jet in the Narrow-Line Quasar PMN J0948+0022". United States. https://doi.org/10.1088/0004-637X/699/2/976. https://www.osti.gov/servlets/purl/1357447.
@article{osti_1357447,
title = {Fermi/Large Area Telescope Discovery of Gamma-Ray Emission from a Relativistic Jet in the Narrow-Line Quasar PMN J0948+0022},
author = {Abdo, A. A. and Ackermann, M. and Ajello, M. and Axelsson, M. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Battelino, M. and Baughman, B. M. and Bechtol, K. and Bellazzini, R. and Bloom, E. D. and Bonamente, E. and Borgland, A. W. and Bregeon, J. and Brez, A. and Brigida, M. and Bruel, P. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Casandjian, J. M. and Cavazzuti, E. and Cecchi, C. and Chekhtman, A. and Cheung, C. C. and Chiang, J. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Collmar, W. and Conrad, J. and Costamante, L. and Dermer, C. D. and de Angelis, A. and de Palma, F. and Digel, S. W. and Silva, E. do Couto e. and Drell, P. S. and Dubois, R. and Dumora, D. and Farnier, C. and Favuzzi, C. and Focke, W. B. and Foschini, L. and Frailis, M. and Fuhrmann, L. and Fukazawa, Y. and Funk, S. and Fusco, P. and Gargano, F. and Gehrels, N. and Germani, S. and Giebels, B. and Giglietto, N. and Giordano, F. and Giroletti, M. and Glanzman, T. and Grenier, I. A. and Grondin, M. -H. and Grove, J. E. and Guillemot, L. and Guiriec, S. and Hanabata, Y. and Harding, A. K. and Hartman, R. C. and Hayashida, M. and Hays, E. and Hughes, R. E. and Jóhannesson, G. and Johnson, A. S. and Johnson, R. P. and Johnson, W. N. and Kamae, T. and Katagiri, H. and Kataoka, J. and Kerr, M. and Knödlseder, J. and Kuehn, F. and Kuss, M. and Lande, J. and Latronico, L. and Lemoine-Goumard, M. and Longo, F. and Loparco, F. and Lott, B. and Lovellette, M. N. and Lubrano, P. and Madejski, G. M. and Makeev, A. and Max-Moerbeck, W. and Mazziotta, M. N. and McConville, W. and McEnery, J. E. and Meurer, C. and Michelson, P. F. and Mitthumsiri, W. and Mizuno, T. and Monte, C. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Nolan, P. L. and Norris, J. P. and Nuss, E. and Ohsugi, T. and Omodei, N. and Orlando, E. and Ormes, J. F. and Paneque, D. and Panetta, J. H. and Parent, D. and Pavlidou, V. and Pearson, T. J. and Pepe, M. and Pesce-Rollins, M. and Piron, F. and Porter, T. A. and Rainò, S. and Rando, R. and Razzano, M. and Readhead, A. and Reimer, A. and Reimer, O. and Reposeur, T. and Richards, J. L. and Ritz, S. and Rodriguez, A. Y. and Romani, R. W. and Ryde, F. and Sadrozinski, H. F. -W. and Sambruna, R. and Sanchez, D. and Sander, A. and Parkinson, P. M. Saz and Scargle, J. D. and Schalk, T. L. and Sgrò, C. and Smith, D. A. and Spandre, G. and Spinelli, P. and Starck, J. -L. and Stevenson, M. and Strickman, M. S. and Suson, D. J. and Tagliaferri, G. and Takahashi, H. and Tanaka, T. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Tibolla, O. and Torres, D. F. and Tosti, G. and Tramacere, A. and Uchiyama, Y. and Usher, T. L. and Vilchez, N. and Vitale, V. and Waite, A. P. and Winer, B. L. and Wood, K. S. and Ylinen, T. and Zensus, J. A. and Ziegler, M. and Ghisellini, G. and Maraschi, L. and Tavecchio, F. and Angelakis, E.},
abstractNote = {In this paper, we report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope of high-energy γ-ray emission from the peculiar quasar PMN J0948+0022 (z = 0.5846). The optical spectrum of this object exhibits rather narrow Hβ (FWHM(Hβ) ~1500 km s–1), weak forbidden lines, and is therefore classified as a narrow-line type I quasar. This class of objects is thought to have relatively small black hole mass and to accrete at a high Eddington ratio. The radio loudness and variability of the compact radio core indicate the presence of a relativistic jet. Quasi-simultaneous radio/optical/X-ray and γ-ray observations are presented. Both radio and γ-ray emissions (observed over five months) are strongly variable. The simultaneous optical and X-ray data from Swift show a blue continuum attributed to the accretion disk and a hard X-ray spectrum attributed to the jet. The resulting broadband spectral energy distribution (SED) and, in particular, the γ-ray spectrum measured by Fermi are similar to those of more powerful Flat-Spectrum Radio Quasars (FSRQs). A comparison of the radio and γ-ray characteristics of PMN J0948+0022 with the other blazars detected by LAT shows that this source has a relatively low radio and γ-ray power with respect to other FSRQs. The physical parameters obtained from modeling the SED also fall at the low power end of the FSRQ parameter region discussed in Celotti & Ghisellini. Finally, we suggest that the similarity of the SED of PMN J0948+0022 to that of more massive and more powerful quasars can be understood in a scenario in which the SED properties depend on the Eddington ratio rather than on the absolute power.},
doi = {10.1088/0004-637X/699/2/976},
journal = {The Astrophysical Journal},
number = 2,
volume = 699,
place = {United States},
year = {Wed Jun 17 00:00:00 EDT 2009},
month = {Wed Jun 17 00:00:00 EDT 2009}
}
Web of Science
Works referenced in this record:
Upper limits from HESS active galactic nuclei observations in 2005–2007
journal, December 2007
- Aharonian, F.; Akhperjanian, A. G.; Barres de Almeida, U.
- Astronomy & Astrophysics, Vol. 478, Issue 2
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009
- Atwood, W. B.; Abdo, A. A.; Ackermann, M.
- The Astrophysical Journal, Vol. 697, Issue 2
The Burst Alert Telescope (BAT) on the SWIFT Midex Mission
journal, October 2005
- Barthelmy, Scott D.; Barbier, Louis M.; Cummings, Jay R.
- Space Science Reviews, Vol. 120, Issue 3-4
A new catalog of 53,522 4.85 GHz sources
journal, January 1991
- Becker, Robert H.; White, Richard L.; Edwards, Alan L.
- The Astrophysical Journal Supplement Series, Vol. 75
The MIT-Green Bank (MG) 5 GHz survey
journal, May 1986
- Bennett, C. L.; Lawrence, C. R.; Burke, B. F.
- The Astrophysical Journal Supplement Series, Vol. 61
Pair cascades in extragalactic jets. 1: Gamma rays
journal, March 1995
- Blandford, R. D.; Levinson, A.
- The Astrophysical Journal, Vol. 441
Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars
journal, December 2000
- Błażejowski, M.; Sikora, M.; Moderski, R.
- The Astrophysical Journal, Vol. 545, Issue 1
Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio‐loud and Radio‐quiet QSOs
journal, January 2002
- Boroson, Todd A.
- The Astrophysical Journal, Vol. 565, Issue 1
An Evolutionary Scenario for Blazar Unification
journal, January 2002
- Bottcher, M.; Dermer, C. D.
- The Astrophysical Journal, Vol. 564, Issue 1
The Swift X-Ray Telescope
journal, October 2005
- Burrows, David N.; Hill, J. E.; Nousek, J. A.
- Space Science Reviews, Vol. 120, Issue 3-4
The relationship between infrared, optical, and ultraviolet extinction
journal, October 1989
- Cardelli, Jason A.; Clayton, Geoffrey C.; Mathis, John S.
- The Astrophysical Journal, Vol. 345
The Blazar Main Sequence
journal, May 2002
- Cavaliere, A.; D’Elia, V.
- The Astrophysical Journal, Vol. 571, Issue 1
The power of blazar jets: The power of blazar jets
journal, February 2008
- Celotti, Annalisa; Ghisellini, Gabriele
- Monthly Notices of the Royal Astronomical Society, Vol. 385, Issue 1
Spitzer Observations of 3C Quasars and Radio Galaxies: Mid‐Infrared Properties of Powerful Radio Sources
journal, May 2007
- Cleary, K.; Lawrence, C. R.; Marshall, J. A.
- The Astrophysical Journal, Vol. 660, Issue 1
Are the black hole masses in narrow-line Seyfert 1 galaxies actually small?
journal, May 2008
- Decarli, Roberto; Dotti, Massimo; Fontana, Marcella
- Monthly Notices of the Royal Astronomical Society: Letters, Vol. 386, Issue 1
VLBI Observations of the Most Radio-Loud, Narrow-Line Quasar SDSS J094857.3 + 002225
journal, October 2006
- Doi, Akihiro; Nagai, Hiroshi; Asada, Keiichi
- Publications of the Astronomical Society of Japan, Vol. 58, Issue 5
A Search for TeV Gamma‐Ray Emission from High‐peaked Flat‐Spectrum Radio Quasars Using the Whipple Air Cerenkov Telescope
journal, October 2004
- Falcone, A. D.; Bond, I. H.; Boyle, P. J.
- The Astrophysical Journal, Vol. 613, Issue 2
GRS 1915+105 and the Disc-Jet Coupling in Accreting Black Hole Systems
journal, September 2004
- Fender, Rob; Belloni, Tomaso
- Annual Review of Astronomy and Astrophysics, Vol. 42, Issue 1
Blazar nuclei in radio-loud narrow-line Seyfert 1?
journal, March 2009
- Foschini, L.; Maraschi, L.; Tavecchio, F.
- Advances in Space Research, Vol. 43, Issue 6
A unifying view of the spectral energy distributions of blazars
journal, September 1998
- Fossati, G.; Maraschi, L.; Celotti, A.
- Monthly Notices of the Royal Astronomical Society, Vol. 299, Issue 2
Simultaneous Radio to (Sub-) mm-Monitoring of Variability and Spectral Shape Evolution of potential GLAST Blazars
conference, January 2007
- Fuhrmann, L.; Zensus, J. A.; Krichbaum, T. P.
- THE FIRST GLAST SYMPOSIUM, AIP Conference Proceedings
Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71: III. Rapid and correlated flux density variability from radio to sub-mm bands
journal, September 2008
- Fuhrmann, L.; Krichbaum, T. P.; Witzel, A.
- Astronomy & Astrophysics, Vol. 490, Issue 3
The Swift Gamma‐Ray Burst Mission
journal, August 2004
- Gehrels, N.; Chincarini, G.; Giommi, P.
- The Astrophysical Journal, Vol. 611, Issue 2
The dividing line between FR I and FR II radio-galaxies
journal, November 2001
- Ghisellini, G.; Celotti, A.
- Astronomy & Astrophysics, Vol. 379, Issue 1
A theoretical unifying scheme for gamma-ray bright blazars
journal, December 1998
- Ghisellini, G.; Celotti, A.; Fossati, G.
- Monthly Notices of the Royal Astronomical Society, Vol. 301, Issue 2
The blazar sequence: a new perspective
journal, July 2008
- Ghisellini, G.; Tavecchio, F.
- Monthly Notices of the Royal Astronomical Society, Vol. 387, Issue 4
The 87GB catalog of radio sources covering delta between O and + 75 deg at 4.85 GHz
journal, February 1991
- Gregory, P. C.; Condon, J. J.
- The Astrophysical Journal Supplement Series, Vol. 75
The Parkes-MIT-NRAO (PMN) surveys. 6: Source catalog for the equatorial survey (-9.5 deg less than delta less than +10.0 deg)
journal, April 1995
- Griffith, Mark R.; Wright, Alan E.; Burke, B. F.
- The Astrophysical Journal Supplement Series, Vol. 97
CGRaBS: An All‐Sky Survey of Gamma‐Ray Blazar Candidates
journal, March 2008
- Healey, Stephen E.; Romani, Roger W.; Cotter, Garret
- The Astrophysical Journal Supplement Series, Vol. 175, Issue 1
The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with
improved stray-radiation corrections
journal, September 2005
- Kalberla, P. M. W.; Burton, W. B.; Hartmann, Dap
- Astronomy & Astrophysics, Vol. 440, Issue 2
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: COSMOLOGICAL INTERPRETATION
journal, February 2009
- Komatsu, E.; Dunkley, J.; Nolta, M. R.
- The Astrophysical Journal Supplement Series, Vol. 180, Issue 2
Radio-loud Narrow-Line Type 1 Quasars
journal, June 2006
- Komossa, Stefanie; Voges, Wolfgang; Xu, Dawei
- The Astronomical Journal, Vol. 132, Issue 2
High energy phenomena in blazars
conference, January 2001
- Maraschi, L.
- RELATIVISTIC ASTROPHYSICS: 20th Texas Symposium, AIP Conference Proceedings
Testing the blazar spectral sequence: X-ray-selected blazars
journal, December 2008
- Maraschi, L.; Foschini, L.; Ghisellini, G.
- Monthly Notices of the Royal Astronomical Society, Vol. 391, Issue 4
The Jet‐Disk Connection and Blazar Unification
journal, August 2003
- Maraschi, Laura; Tavecchio, Fabrizio
- The Astrophysical Journal, Vol. 593, Issue 2
The Effect of Radiation Pressure on Virial Black Hole Mass Estimates and the Case of Narrow‐Line Seyfert 1 Galaxies
journal, May 2008
- Marconi, Alessandro; Axon, David J.; Maiolino, Roberto
- The Astrophysical Journal, Vol. 678, Issue 2
The Likelihood Analysis of EGRET Data
journal, April 1996
- Mattox, J. R.; Bertsch, D. L.; Chiang, J.
- The Astrophysical Journal, Vol. 461
The USNO-B Catalog
journal, February 2003
- Monet, David G.; Levine, Stephen E.; Canzian, Blaise
- The Astronomical Journal, Vol. 125, Issue 2
ASCA Observations of Seyfert 1 Galaxies. I. Data Analysis, Imaging, and Timing
journal, February 1997
- Nandra, K.; George, I. M.; Mushotzky, R. F.
- The Astrophysical Journal, Vol. 476, Issue 1
AGN Dusty Tori. I. Handling of Clumpy Media
journal, September 2008
- Nenkova, Maia; Sirocky, Matthew M.; Ivezić, Željko
- The Astrophysical Journal, Vol. 685, Issue 1
The blazar sequence: validity and predictions
journal, April 2007
- Padovani, Paolo
- Astrophysics and Space Science, Vol. 309, Issue 1-4
Narrow-line Seyfert 1s: 15 years later
journal, September 2000
- Pogge, Richard W.
- New Astronomy Reviews, Vol. 44, Issue 7-9
Photometric calibration of the Swift ultraviolet/optical telescope: Photometric calibration of the Swift UVOT
journal, December 2007
- Poole, T. S.; Breeveld, A. A.; Page, M. J.
- Monthly Notices of the Royal Astronomical Society, Vol. 383, Issue 2
Equipartition brightness temperature and the inverse Compton catastrophe
journal, May 1994
- Readhead, Anthony C. S.
- The Astrophysical Journal, Vol. 426
A limit of the anisotropy of the microwave background radiation on arc minute scales
journal, November 1989
- Readhead, A. C. S.; Lawrence, C. R.; Myers, S. T.
- The Astrophysical Journal, Vol. 346
Appearance of Relativistically Expanding Radio Sources
journal, July 1966
- Rees, M. J.
- Nature, Vol. 211, Issue 5048
The Narrow‐Line Region of Narrow‐Line Seyfert 1 Galaxies
journal, August 2000
- Rodriguez‐Ardila, A.; Binette, Luc; Pastoriza, Miriani G.
- The Astrophysical Journal, Vol. 538, Issue 2
The Swift Ultra-Violet/Optical Telescope
journal, October 2005
- Roming, Peter W. A.; Kennedy, Thomas E.; Mason, Keith O.
- Space Science Reviews, Vol. 120, Issue 3-4
Comptonization of diffuse ambient radiation by a relativistic jet: The source of gamma rays from blazars?
journal, January 1994
- Sikora, Marek; Begelman, Mitchell C.; Rees, Martin J.
- The Astrophysical Journal, Vol. 421
The Gamma‐Ray Blazar Content of the Northern Sky
journal, June 2003
- Sowards‐Emmerd, David; Romani, Roger W.; Michelson, Peter F.
- The Astrophysical Journal, Vol. 590, Issue 1
Unified Schemes for Radio-Loud Active Galactic Nuclei
journal, June 1995
- Urry, C. Megan; Padovani, Paolo
- Publications of the Astronomical Society of the Pacific, Vol. 107
Quasi-simultaneous multi-frequency observations of inverted-spectrum GPS candidate sources
journal, July 2008
- Vollmer, B.; Krichbaum, T. P.; Angelakis, E.
- Astronomy & Astrophysics, Vol. 489, Issue 1
A new catalog of 30,239 1.4 GHz sources
journal, April 1992
- White, Richard L.; Becker, Robert H.
- The Astrophysical Journal Supplement Series, Vol. 79
A Population of Radio‐Loud Narrow‐Line Seyfert 1 Galaxies with Blazar‐Like Properties?
journal, October 2008
- Yuan, W.; Zhou, H. Y.; Komossa, S.
- The Astrophysical Journal, Vol. 685, Issue 2
SDSS J094857.3+002225: A Very Radio Loud, Narrow‐Line Quasar with Relativistic Jets?
journal, February 2003
- Zhou, Hong‐Yan; Wang, Ting‐Gui; Dong, Xiao‐Bo
- The Astrophysical Journal, Vol. 584, Issue 1
A Comprehensive Study of 2000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey. I. The Sample
journal, September 2006
- Zhou, Hongyan; Wang, Tinggui; Yuan, Weimin
- The Astrophysical Journal Supplement Series, Vol. 166, Issue 1
Works referencing / citing this record:
The black hole mass, jet power and accretion in blazars and flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
journal, August 2019
- Chen, Yongyun; Gu, Qiusheng
- Astrophysics and Space Science, Vol. 364, Issue 8
Radio-to- γ -ray monitoring of the narrow-line Seyfert 1 galaxy PMN J0948 + 0022 from 2008 to 2011
journal, November 2012
- Foschini, L.; Angelakis, E.; Fuhrmann, L.
- Astronomy & Astrophysics, Vol. 548
Statistical multifrequency study of narrow-line Seyfert 1 galaxies
journal, December 2014
- Järvelä, E.; Lähteenmäki, A.; León-Tavares, J.
- Astronomy & Astrophysics, Vol. 573
What powers the radio-loud narrow-line Seyfert 1 galaxy RX J2314.9+2243?: A view onto its central engine from radio to X-rays⋆
journal, February 2015
- Komossa, S.; Xu, Dawei; Fuhrmann, L.
- Astronomy & Astrophysics, Vol. 574
Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
journal, February 2015
- Foschini, L.; Berton, M.; Caccianiga, A.
- Astronomy & Astrophysics, Vol. 575
Radio jet emission from GeV-emitting narrow-line Seyfert 1 galaxies
journal, February 2015
- Angelakis, E.; Fuhrmann, L.; Marchili, N.
- Astronomy & Astrophysics, Vol. 575
Parent population of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
journal, May 2015
- Berton, M.; Foschini, L.; Ciroi, S.
- Astronomy & Astrophysics, Vol. 578
[O III] line properties in two samples of radio-emitting narrow-line Seyfert 1 galaxies
journal, June 2016
- Berton, M.; Foschini, L.; Ciroi, S.
- Astronomy & Astrophysics, Vol. 591
The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004−447: II. The radio view⋆
journal, April 2016
- Schulz, R.; Kreikenbohm, A.; Kadler, M.
- Astronomy & Astrophysics, Vol. 588
Compact steep-spectrum sources as the parent population of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
journal, June 2016
- Berton, M.; Caccianiga, A.; Foschini, L.
- Astronomy & Astrophysics, Vol. 591
Coexistence of a non-thermal jet and a complex ultra-fast X-ray outflow in a moderately luminous AGN
journal, April 2017
- Giroletti, M.; Panessa, F.; Longinotti, A. L.
- Astronomy & Astrophysics, Vol. 600
37 GHz observations of narrow-line Seyfert 1 galaxies
journal, July 2017
- Lähteenmäki, A.; Järvelä, E.; Hovatta, T.
- Astronomy & Astrophysics, Vol. 603
Fermi-LAT observation of nonblazar AGNs
journal, June 2018
- Sahakyan, N.; Baghmanyan, V.; Zargaryan, D.
- Astronomy & Astrophysics, Vol. 614
Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective
journal, June 2018
- Berton, M.; Congiu, E.; Järvelä, E.
- Astronomy & Astrophysics, Vol. 614
Optical polarisation variability of radio-loud narrow-line Seyfert 1 galaxies: Search for long rotations of the polarisation plane
journal, October 2018
- Angelakis, E.; Kiehlmann, S.; Myserlis, I.
- Astronomy & Astrophysics, Vol. 618
Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies
journal, June 2018
- Lähteenmäki, A.; Järvelä, E.; Ramakrishnan, V.
- Astronomy & Astrophysics, Vol. 614
Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies
journal, December 2019
- Berton, M.; Braito, V.; Mathur, S.
- Astronomy & Astrophysics, Vol. 632
Radio-Loud Narrow-Line Seyfert 1 as a new Class of Gamma-Ray Active Galactic Nuclei
journal, December 2009
- Abdo, A. A.; Ackermann, M.; Ajello, M.
- The Astrophysical Journal, Vol. 707, Issue 2
THE FIRST CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE
journal, April 2010
- Abdo, A. A.; Ackermann, M.; Ajello, M.
- The Astrophysical Journal, Vol. 715, Issue 1
BLAZARS IN THE FERMI ERA: THE OVRO 40 m TELESCOPE MONITORING PROGRAM
journal, May 2011
- Richards, Joseph L.; Max-Moerbeck, Walter; Pavlidou, Vasiliki
- The Astrophysical Journal Supplement Series, Vol. 194, Issue 2
The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales
journal, October 2015
- Gu, Minfeng; Chen, Yongjun; Komossa, S.
- The Astrophysical Journal Supplement Series, Vol. 221, Issue 1
Intranight optical variability of -ray-loud narrow-line Seyfert 1 galaxies
journal, November 2012
- Paliya, V. S.; Stalin, C. S.; Kumar, B.
- Monthly Notices of the Royal Astronomical Society, Vol. 428, Issue 3
The most powerful flaring activity from the NLSy1 PMN J0948+0022
journal, November 2014
- D'Ammando, F.; Orienti, M.; Finke, J.
- Monthly Notices of the Royal Astronomical Society, Vol. 446, Issue 3
Investigating kpc-scale radio emission properties of narrow-line Seyfert 1 galaxies
journal, July 2018
- Singh, Veeresh; Chand, Hum
- Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 2
FBQS J1644+2619: multiwavelength properties and its place in the class of γ-ray emitting Narrow Line Seyfert 1s
journal, January 2018
- Larsson, J.; D’Ammando, F.; Falocco, S.
- Monthly Notices of the Royal Astronomical Society, Vol. 476, Issue 1
Prospects for gamma-ray observations of narrow-line Seyfert 1 galaxies with the Cherenkov Telescope Array
journal, September 2018
- Romano, P.; Vercellone, S.; Foschini, L.
- Monthly Notices of the Royal Astronomical Society, Vol. 481, Issue 4
WISE view of narrow-line Seyfert 1 galaxies: mid-infrared colour and variability
journal, November 2018
- Rakshit, Suvendu; Johnson, Ansu; Stalin, C. S.
- Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 2
Intra-night optical variability of misaligned active galaxies
journal, December 2018
- Bhattacharya, Debbijoy; Gulati, Sanna; Stalin, C. S.
- Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 3
Exploring the physics of the accretion and jet in nearby narrow-line Seyfert 1 galaxies
journal, March 2018
- Yao, Su; Qiao, Erlin; Wu, Xue-Bing
- Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 1
SDSS J211852.96−073227.5: a new γ-ray flaring narrow-line Seyfert 1 galaxy
journal, April 2018
- Yang, Hui; Yuan, Weimin; Yao, Su
- Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 4
SDSS J094635.06+101706.1: a redshift one, very radio-loud, γ-ray emitting narrow-line Seyfert 1 galaxy
journal, May 2019
- Yao, Su; Komossa, S.; Liu, Wen-Juan
- Monthly Notices of the Royal Astronomical Society: Letters, Vol. 487, Issue 1
General physical properties of bright Fermi blazars: Properties of bright Fermi blazars
journal, November 2009
- Ghisellini, G.; Tavecchio, F.; Foschini, L.
- Monthly Notices of the Royal Astronomical Society, Vol. 402, Issue 1
B2 0954+25A: a typical Fermi blazar or a γ-ray loud Narrow Line Seyfert 1≟: B2 0954+25A: a typical blazar or a γ-ray NLS1?
journal, July 2012
- Calderone, G.; Ghisellini, G.; Colpi, M.
- Monthly Notices of the Royal Astronomical Society, Vol. 424, Issue 4
SBS 0846+513: a new γ-ray-emitting narrow-line Seyfert 1 galaxy: SBS 0846+513: a new γ-ray-emitting NLS1
journal, September 2012
- D'Ammando, F.; Orienti, M.; Finke, J.
- Monthly Notices of the Royal Astronomical Society, Vol. 426, Issue 1
Gamma-Ray Emission from agns (Special Focus on bl lac Objects)
journal, June 2010
- Tavecchio, F.
- International Journal of Modern Physics D, Vol. 19, Issue 06
Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies: Past, Present, and Future
text, January 2019
- Paliya, Vaidehi Sharan
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
What We Talk about When We Talk about Blazars?
journal, July 2017
- Foschini, Luigi
- Frontiers in Astronomy and Space Sciences, Vol. 4
Fast γ-ray Variability: A Common Feature and Powerful Probe for Jetted AGNs
journal, July 2018
- Liao, Neng-hui
- Galaxies, Vol. 6, Issue 3
Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies
journal, November 2019
- D’Ammando, Filippo
- Galaxies, Vol. 7, Issue 4
DISCOVERY OF γ -RAY EMISSION FROM THE RADIO-INTERMEDIATE QUASAR III ZW 2: VIOLENT JET ACTIVITY WITH INTRADAY γ -RAY VARIABILITY
journal, October 2016
- Liao, Neng-Hui; Xin, Yu-Liang; Fan, Xu-Liang
- The Astrophysical Journal Supplement Series, Vol. 226, Issue 2
The Interacting Late-type Host Galaxy of the Radio-loud Narrow-line Seyfert 1 IRAS 20181-2244
journal, January 2019
- Berton, M.; Congiu, E.; Ciroi, S.
- The Astronomical Journal, Vol. 157, Issue 2
Two Transient X-Ray Quasi-periodic Oscillations Separated by an Intermediate State in 1H 0707-495
journal, February 2018
- Zhang, Peng-fei; Zhang, Peng; Liao, Neng-hui
- The Astrophysical Journal, Vol. 853, Issue 2
Intermediate-line Emission in AGNs: The Effect of Prescription of the Gas Density
journal, March 2018
- Adhikari, T. P.; Hryniewicz, K.; Różańska, A.
- The Astrophysical Journal, Vol. 856, Issue 1
Independent Estimation of Black Hole Mass for the γ -ray-detected Archetypal Narrow-line Seyfert 1 Galaxy 1H 0323+342 from X-Ray Variability
journal, October 2018
- Pan, Hai-Wu; Yuan, Weimin; Yao, Su
- The Astrophysical Journal, Vol. 866, Issue 1
Rare Finding of a 100 Kpc Large, Double-lobed Radio Galaxy Hosted in the Narrow-line Seyfert 1 Galaxy SDSS J103024.95+551622.7
journal, December 2018
- Rakshit, Suvendu; Stalin, C. S.; Hota, Ananda
- The Astrophysical Journal, Vol. 869, Issue 2
The Circinus Galaxy Revisited with 10 yr Fermi -LAT Data
journal, November 2019
- Guo, Xiao-Lei; Xin, Yu-Liang; Liao, Neng-Hui
- The Astrophysical Journal, Vol. 885, Issue 2
Gamma-Ray-emitting Narrow-line Seyfert 1 Galaxies in the Sloan Digital Sky Survey
journal, January 2018
- Paliya, Vaidehi S.; Ajello, M.; Rakshit, S.
- The Astrophysical Journal, Vol. 853, Issue 1
Are Narrow-line Seyfert 1 Galaxies Powered by Low-mass Black Holes?
journal, August 2019
- Viswanath, Gayathri; Stalin, C. S.; Rakshit, Suvendu
- The Astrophysical Journal, Vol. 881, Issue 1
Gamma-ray emitting narrow-line Seyfert 1 galaxies: Past, present, and future
journal, October 2019
- Paliya, Vaidehi S.
- Journal of Astrophysics and Astronomy, Vol. 40, Issue 5
The most powerful flaring activity from the NLSy1 PMN J0948+0022
text, January 2015
- D'Ammando, F.; Orienti, M.; Finke, J.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
text, January 2010
- Abdo, A. A.
- arXiv
Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
text, January 2010
- Richards, Joseph L.; Max-Moerbeck, Walter; Pavlidou, Vasiliki
- arXiv
Radio-to-gamma-ray Monitoring of the Narrow-Line Seyfert 1 Galaxy PMN J0948+0022 from 2008 to 2011
text, January 2012
- Foschini, L.; Angelakis, E.; Fuhrmann, L.
- arXiv
Parent population of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
text, January 2015
- Berton, Marco; Foschini, Luigi; Ciroi, Stefano
- arXiv
[O III] line properties in two samples of radio-emitting narrow-line Seyfert 1 galaxies
text, January 2015
- Berton, M.; Foschini, L.; Ciroi, S.
- arXiv
The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales
text, January 2015
- Gu, Minfeng; Chen, Yongjun; Komossa, S.
- arXiv
The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. The Radio View
text, January 2015
- Schulz, R.; Kreikenbohm, A.; Kadler, M.
- arXiv
Two transient X-ray Quasi-Periodic Oscillations separated by an intermediate state in 1H 0707-495
text, January 2017
- Zhang, Peng-Fei; Zhang, Peng; Liao, Neng-Hui
- arXiv
37 GHz observations of narrow-line Seyfert 1 galaxies
text, January 2017
- Lähteenmäki, A.; Järvelä, E.; Hovatta, T.
- arXiv
FBQS J1644+2619: multiwavelength properties and its place in the class of gamma-ray emitting Narrow Line Seyfert 1s
text, January 2018
- Larsson, J.; D'Ammando, F.; Falocco, S.
- arXiv
Fermi-LAT Observation of Non-Blazar AGNs
text, January 2018
- Sahakyan, N.; Baghmanyan, V.; Zargaryan, D.
- arXiv
Exploring the physics of the accretion and jet in nearby narrow-line Seyfert 1 galaxies
text, January 2018
- Yao, Su; Qiao, Erlin; Wu, Xue-Bing
- arXiv
Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies
text, January 2018
- Lähteenmäki, A.; Järvelä, E.; Ramakrishnan, V.
- arXiv
Investigating kpc-scale radio emission properties of narrow-line Seyfert 1 galaxies
text, January 2018
- Singh, Veeresh; Chand, Hum
- arXiv
WISE view of Narrow-Line Seyfert 1 galaxies: mid-infrared color and variability
text, January 2018
- Rakshit, Suvendu; Johnson, Ansu; Stalin, C. S.
- arXiv