Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Fermi observations of the very hard gamma-ray blazar PG 1553+113

Abstract

Here, we report the observations of PG 1553+113 during the first ~ 200 days of Fermi Gamma-ray Space Telescope science operations, from 2008 August 4 to 2009 February 22 (MJD 54682.7-54884.2). This is the first detailed study of PG 1553+113 in the GeV gamma-ray regime and it allows us to fill a gap of three decades in energy in its spectral energy distribution (SED). We find PG 1553+113 to be a steady source with a hard spectrum that is best fit by a simple power law in the Fermi energy band. We combine the Fermi data with archival radio, optical, X-ray, and very high energy (VHE) gamma-ray data to model its broadband SED and find that a simple, one-zone synchrotron self-Compton model provides a reasonable fit. PG 1553+113 has the softest VHE spectrum of all sources detected in that regime and, out of those with significant detections across the Fermi energy bandpass so far, the hardest spectrum in that energy regime. Thus, it has the largest spectral break of any gamma-ray source studied to date, which could be due to the absorption of the intrinsic gamma-ray spectrum by the extragalactic background light (EBL). Assuming this to be the case, wemore » selected a model with a low level of EBL and used it to absorb the power-law spectrum from PG 1553+113 measured with Fermi (200 MeV-157 GeV) to find the redshift, which gave the best fit to the measured VHE data (90 GeV-1.1 TeV) for this parameterization of the EBL. We show that this redshift can be considered an upper limit on the distance to PG 1553+113.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1357591
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal
Additional Journal Information:
Journal Volume: 708; 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; BL Lacertae objects: individual (PG 1553+113); gamma rays: observations

Citation Formats

Abdo, A. A., Ackermann, M., Ajello, M., Atwood, W. B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M. L., 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., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., 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., Ozaki, M., Paneque, D., Panetta, J. H., Parent, D., Pelassa, V., Pepe, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. -W., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Sgrò, C., Shaw, M. S., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., and Ziegler, M. Fermi observations of the very hard gamma-ray blazar PG 1553+113. United States: N. p., 2009. Web. doi:10.1088/0004-637X/708/2/1310.
Copy to clipboard
Abdo, A. A., Ackermann, M., Ajello, M., Atwood, W. B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M. L., 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., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., 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., Ozaki, M., Paneque, D., Panetta, J. H., Parent, D., Pelassa, V., Pepe, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. -W., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Sgrò, C., Shaw, M. S., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., & Ziegler, M. Fermi observations of the very hard gamma-ray blazar PG 1553+113. United States. https://doi.org/10.1088/0004-637X/708/2/1310
Copy to clipboard
Abdo, A. A., Ackermann, M., Ajello, M., Atwood, W. B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M. L., 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., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., 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., Ozaki, M., Paneque, D., Panetta, J. H., Parent, D., Pelassa, V., Pepe, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. -W., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Sgrò, C., Shaw, M. S., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., and Ziegler, M. Tue . "Fermi observations of the very hard gamma-ray blazar PG 1553+113". United States. https://doi.org/10.1088/0004-637X/708/2/1310. https://www.osti.gov/servlets/purl/1357591.
Copy to clipboard
@article{osti_1357591,
title = {Fermi observations of the very hard gamma-ray blazar PG 1553+113},
author = {Abdo, A. A. and Ackermann, M. and Ajello, M. and Atwood, W. B. and Axelsson, M. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Bechtol, K. and Bellazzini, R. and Berenji, B. and Bloom, E. D. and Bonamente, E. and Borgland, A. W. and Bregeon, J. and Brez, A. and Brigida, M. and Bruel, P. and Burnett, T. H. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Casandjian, J. M. and Cavazzuti, E. and Cecchi, C. and Çelik, Ö. and Charles, E. and Chekhtman, A. and Cheung, C. C. and Chiang, J. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Conrad, J. and Cutini, S. and Dermer, C. D. and de Angelis, A. and de Palma, F. and Silva, E. do Couto e. and Drell, P. S. and Dubois, R. and Dumora, D. and Farnier, C. and Favuzzi, C. and Fegan, S. J. and Focke, W. B. and Fortin, P. and Frailis, M. and Fukazawa, Y. and Fusco, P. and Gargano, F. and Gasparrini, D. and Gehrels, N. and Germani, S. and Giebels, B. and Giglietto, N. and Giordano, F. and Glanzman, T. and Godfrey, G. 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 Hayashida, M. and Hays, E. and Horan, D. 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 Kawai, N. and Kerr, M. and Knödlseder, J. and Kocian, M. L. 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 Mazziotta, M. N. and McConville, W. and McEnery, J. E. and Meurer, C. and Michelson, P. F. and Mitthumsiri, W. and Mizuno, T. and Moiseev, A. A. 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 Ozaki, M. and Paneque, D. and Panetta, J. H. and Parent, D. and Pelassa, V. and Pepe, M. and Piron, F. and Porter, T. A. and Rainò, S. and Rando, R. and Razzano, M. and Reimer, A. and Reimer, O. and Reposeur, T. and Ritz, S. and Rodriguez, A. Y. and Romani, R. W. and Roth, M. and Ryde, F. and Sadrozinski, H. F. -W. and Sanchez, D. and Sander, A. and Parkinson, P. M. Saz and Scargle, J. D. and Sgrò, C. and Shaw, M. S. and Siskind, E. J. and Smith, D. A. and Smith, P. D. and Spandre, G. and Spinelli, P. and Strickman, M. S. and Suson, D. J. and Takahashi, H. and Tanaka, T. and Thayer, J. B. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Torres, D. F. and Tosti, G. and Tramacere, A. and Uchiyama, Y. and Usher, T. L. and Vasileiou, V. and Vilchez, N. and Vitale, V. and Waite, A. P. and Wang, P. and Winer, B. L. and Wood, K. S. and Ylinen, T. and Ziegler, M.},
abstractNote = {Here, we report the observations of PG 1553+113 during the first ~ 200 days of Fermi Gamma-ray Space Telescope science operations, from 2008 August 4 to 2009 February 22 (MJD 54682.7-54884.2). This is the first detailed study of PG 1553+113 in the GeV gamma-ray regime and it allows us to fill a gap of three decades in energy in its spectral energy distribution (SED). We find PG 1553+113 to be a steady source with a hard spectrum that is best fit by a simple power law in the Fermi energy band. We combine the Fermi data with archival radio, optical, X-ray, and very high energy (VHE) gamma-ray data to model its broadband SED and find that a simple, one-zone synchrotron self-Compton model provides a reasonable fit. PG 1553+113 has the softest VHE spectrum of all sources detected in that regime and, out of those with significant detections across the Fermi energy bandpass so far, the hardest spectrum in that energy regime. Thus, it has the largest spectral break of any gamma-ray source studied to date, which could be due to the absorption of the intrinsic gamma-ray spectrum by the extragalactic background light (EBL). Assuming this to be the case, we selected a model with a low level of EBL and used it to absorb the power-law spectrum from PG 1553+113 measured with Fermi (200 MeV-157 GeV) to find the redshift, which gave the best fit to the measured VHE data (90 GeV-1.1 TeV) for this parameterization of the EBL. We show that this redshift can be considered an upper limit on the distance to PG 1553+113.},
doi = {10.1088/0004-637X/708/2/1310},
journal = {The Astrophysical Journal},
number = 2,
volume = 708,
place = {United States},
year = {Tue Dec 22 00:00:00 EST 2009},
month = {Tue Dec 22 00:00:00 EST 2009}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1088/0004-637X/708/2/1310
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

The Seventh data Release of the Sloan Digital sky Survey
journal, May 2009

  • Abazajian, Kevork N.; Adelman-McCarthy, Jennifer K.; Agüeros, Marcel A.
  • The Astrophysical Journal Supplement Series, Vol. 182, Issue 2
  • DOI: 10.1088/0067-0049/182/2/543

BRIGHT ACTIVE GALACTIC NUCLEI SOURCE LIST FROM THE FIRST THREE MONTHS OF THE FERMI LARGE AREA TELESCOPE ALL-SKY SURVEY
journal, July 2009

FERMI /LARGE AREA TELESCOPE BRIGHT GAMMA-RAY SOURCE LIST
journal, June 2009

  • Abdo, A. A.; Ackermann, M.; Ajello, M.
  • The Astrophysical Journal Supplement Series, Vol. 183, Issue 1
  • DOI: 10.1088/0067-0049/183/1/46

A low level of extragalactic background light as revealed by γ-rays from blazars
journal, April 2006

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • Nature, Vol. 440, Issue 7087
  • DOI: 10.1038/nature04680

Evidence for VHE γ -ray emission from the distant BL Lac PG 1553+113
journal, February 2006

Observations of the Crab nebula with HESS
journal, September 2006

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • Astronomy & Astrophysics, Vol. 457, Issue 3
  • DOI: 10.1051/0004-6361:20065351

HESS observations and VLT spectroscopy of PG 1553+113
journal, November 2007

  • Aharonian, F.; Akhperjanian, A. G.; Barres de Almeida, U.
  • Astronomy & Astrophysics, Vol. 477, Issue 2
  • DOI: 10.1051/0004-6361:20078603

SIMULTANEOUS OBSERVATIONS OF PKS 2155–304 WITH HESS, FERMI , RXTE , AND ATOM: SPECTRAL ENERGY DISTRIBUTIONS AND VARIABILITY IN A LOW STATE
journal, April 2009

Very high energy gamma rays from active galactic nuclei: Cascading on the cosmic background radiation fields and the formation of pair halos
journal, March 1994

  • Aharonian, F. A.; Coppi, P. S.; Voelk, H. J.
  • The Astrophysical Journal, Vol. 423
  • DOI: 10.1086/187222

Detection of Very High Energy Radiation from the BL Lacertae Object PG 1553+113 with the MAGIC Telescope
journal, December 2006

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 654, Issue 2
  • DOI: 10.1086/511384

VHE γ‐Ray Observation of the Crab Nebula and its Pulsar with the MAGIC Telescope
journal, February 2008

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 674, Issue 2
  • DOI: 10.1086/525270

MAGIC observations of PG 1553+113 during a multiwavelength campaign in July 2006
journal, November 2008

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009

The synchrotron-self-Compton process in spherical geometries. I - Theoretical framework
journal, November 1985

  • Band, D. L.; Grindlay, J. E.
  • The Astrophysical Journal, Vol. 298
  • DOI: 10.1086/163593

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
  • DOI: 10.1086/191529

BeppoSAX spectral survey of BL Lacs – New spectra and results
journal, February 2002

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
  • DOI: 10.1086/191108

Implications of modified AGN spectra due to absorption by infrared photons
journal, August 1995

Gamma-Ray Variability of the BL Lacertae Object Markarian 421
journal, November 1996

  • Buckley, J. H.; Akerlof, C. W.; Biller, S.
  • The Astrophysical Journal, Vol. 472, Issue 1
  • DOI: 10.1086/310352

SIMULTANEOUS X-RAY/TeV OBSERVATIONS OF AN EXCEPTIONAL FLARE OF PKS 2155-304
journal, September 2008

Constraining the cosmic background light with four BL Lac TeV spectra
journal, April 2004

Cascading on extragalactic background light
journal, May 2007

Hard X-ray properties of blazars
journal, September 2001

Six years of BeppoSAX observations of blazars: A spectral catalog
journal, March 2005

The Texas Survey of Radio Sources Covering -35.5 degrees < declination < 71.5 degrees at 365 MHz
journal, May 1996

  • Douglas, James N.; Bash, Frank N.; Bozyan, F. Arakel
  • The Astronomical Journal, Vol. 111
  • DOI: 10.1086/117932

Gamma-ray induced cascades and magnetic fields in the intergalactic medium
journal, July 2009

Optical spectrophotometry of blazars
journal, July 1994

  • Falomo, R.; Scarpa, R.; Bersanelli, M.
  • The Astrophysical Journal Supplement Series, Vol. 93
  • DOI: 10.1086/192048

PG 1553 + 11 - A bright optically selected BL Lacertae object
journal, October 1990

  • Falomo, Renato; Treves, Aldo
  • Publications of the Astronomical Society of the Pacific, Vol. 102
  • DOI: 10.1086/132740

Constraints on the Extragalactic Background Light from very high Energy Gamma-Ray Observations of Blazars
journal, June 2009

A Survey of O vi , C iii , and H i in Highly Ionized High‐Velocity Clouds
journal, July 2006

  • Fox, Andrew J.; Savage, Blair D.; Wakker, Bart P.
  • The Astrophysical Journal Supplement Series, Vol. 165, Issue 1
  • DOI: 10.1086/504800

Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity
journal, June 2008

Extremely rapid bursts of TeV photons from the active galaxy Markarian 421
journal, September 1996

  • Gaidos, J. A.; Akerlof, C. W.; Biller, S.
  • Nature, Vol. 383, Issue 6598
  • DOI: 10.1038/383319a0

Spectra, optical identifications, and statistics of a complete sample of radio sources at declinations 10°–12°30′
journal, November 2003

  • Gorshkov, A. G.; Konnikova, V. K.; Mingaliev, M. G.
  • Astronomy Reports, Vol. 47, Issue 11
  • DOI: 10.1134/1.1626193

The Palomar-Green catalog of ultraviolet-excess stellar objects
journal, June 1986

  • Green, R. F.; Schmidt, M.; Liebert, J.
  • The Astrophysical Journal Supplement Series, Vol. 61
  • DOI: 10.1086/191115

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
  • DOI: 10.1086/191559

The Third EGRET Catalog of High‐Energy Gamma‐Ray Sources
journal, July 1999

  • Hartman, R. C.; Bertsch, D. L.; Bloom, S. D.
  • The Astrophysical Journal Supplement Series, Vol. 123, Issue 1
  • DOI: 10.1086/313231

Optical imaging of QSOs with 0.5 arcsec resolution
journal, July 1992

  • Hutchings, J. B.; Neff, S. G.
  • The Astronomical Journal, Vol. 104
  • DOI: 10.1086/116216

Implications of cosmological gamma-ray absorption: II. Modification of gamma-ray spectra
journal, January 2004

Constraints on Energy Spectra of Blazars based on Recent EBL Limits from Galaxy Counts
journal, November 2008

  • Krennrich, F.; Dwek, E.; Imran, A.
  • The Astrophysical Journal, Vol. 689, Issue 2
  • DOI: 10.1086/595960

X-ray spectral evolution of TeV BL Lacertae objects: eleven years of observations with BeppoSAX , XMM-Newton and Swift  satellites
journal, December 2007

Break in the Very High Energy Spectrum of PG 1553+113: New Upper Limit on Its Redshift?
journal, January 2007

  • Mazin, Daniel; Goebel, Florian
  • The Astrophysical Journal, Vol. 655, Issue 1
  • DOI: 10.1086/511751

Host Galaxy Evolution in Radio‐Loud Active Galactic Nuclei
journal, July 2005

  • O’Dowd, Matthew; Urry, C. Megan
  • The Astrophysical Journal, Vol. 627, Issue 1
  • DOI: 10.1086/426705

Multiwavelength Observations of the Extreme X-Ray-selected BL Lacertae Object PG 1553+11 (1ES 1553+113)
journal, July 2006

  • Osterman, M. Angela; Miller, H. Richard; Campbell, Amy M.
  • The Astronomical Journal, Vol. 132, Issue 2
  • DOI: 10.1086/505565

Intrinsic Curvature in the X‐Ray Spectra of BL Lacertae Objects
journal, June 2005

  • Perlman, Eric S.; Madejski, Greg; Georganopoulos, Markos
  • The Astrophysical Journal, Vol. 625, Issue 2
  • DOI: 10.1086/429688

Probing galaxy formation with high energy gamma-rays
conference, January 2001

  • Primack, Joel R.
  • The international symposium on high energy gamma-ray astronomy, AIP Conference Proceedings
  • DOI: 10.1063/1.1370813

Effect of electron-photon cascading on the observed energy spectra of extragalactic sources of ultra-high-energy  -rays
journal, August 1986

  • Protheroe, R. J.
  • Monthly Notices of the Royal Astronomical Society, Vol. 221, Issue 4
  • DOI: 10.1093/mnras/221.4.769

Electron-photon cascading of very high-energy gamma-rays in the infrared background
journal, September 1993

  • Protheroe, R. J.; Stanev, T.
  • Monthly Notices of the Royal Astronomical Society, Vol. 264, Issue 1
  • DOI: 10.1093/mnras/264.1.191

The Flux Variability of Markarian 501 in Very High Energy Gamma Rays
journal, June 1999

  • Quinn, J.; Bond, I. H.; Boyle, P. J.
  • The Astrophysical Journal, Vol. 518, Issue 2
  • DOI: 10.1086/307329

The Radio Structure of High-Energy–Peaked BL Lacertae Objects
journal, March 2003

  • Rector, Travis A.; Gabuzda, Denise C.; Stocke, John T.
  • The Astronomical Journal, Vol. 125, Issue 3
  • DOI: 10.1086/367802

A Hard X‐Ray View of Two Distant VHE Blazars: 1ES 1101−232 and 1ES 1553+113
journal, August 2008

  • Reimer, A.; Costamante, L.; Madejski, G.
  • The Astrophysical Journal, Vol. 682, Issue 2
  • DOI: 10.1086/589641

Imaging Redshifts of BL Lacertae Objects
journal, December 2005

  • Sbarufatti, B.; Treves, A.; Falomo, R.
  • The Astrophysical Journal, Vol. 635, Issue 1
  • DOI: 10.1086/497022

ESO Very Large Telescope Optical Spectroscopy of BL Lacertae Objects. II. New Redshifts, Featureless Objects, and Classification Assessments
journal, June 2006

  • Sbarufatti, B.; Treves, A.; Falomo, R.
  • The Astronomical Journal, Vol. 132, Issue 1
  • DOI: 10.1086/503031

The Hubble Space Telescope Survey of BL Lacertae Objects. I. Surface Brightness Profiles, Magnitudes, and Radii of Host Galaxies
journal, April 2000

  • Scarpa, Riccardo; Urry, C. Megan; Falomo, Renato
  • The Astrophysical Journal, Vol. 532, Issue 2
  • DOI: 10.1086/308618

Blazar γ-Rays, Shock Acceleration, and the Extragalactic Background Light
journal, September 2007

  • Stecker, Floyd W.; Baring, Matthew G.; Summerlin, Errol J.
  • The Astrophysical Journal, Vol. 667, Issue 1
  • DOI: 10.1086/522005

Diffuse Galactic Continuum Gamma Rays: A Model Compatible with EGRET Data and Cosmic‐Ray Measurements
journal, October 2004

  • Strong, Andrew W.; Moskalenko, Igor V.; Reimer, Olaf
  • The Astrophysical Journal, Vol. 613, Issue 2
  • DOI: 10.1086/423193

The distribution of cosmic-ray sources in the Galaxy, γ-rays and the gradient in the CO-to-H 2 relation
journal, July 2004

SWIFT observations of TeV BL Lacertae objects
journal, February 2007

On the distance of PG 1553+11: A lineless BL Lacertae object active in the TeV band
journal, September 2007

The Hubble Space Telescope Survey of BL Lacertae Objects. II. Host Galaxies
journal, April 2000

  • Urry, C. Megan; Scarpa, Riccardo; O’Dowd, Matthew
  • The Astrophysical Journal, Vol. 532, Issue 2
  • DOI: 10.1086/308616

On characterizing the variability properties of X-ray light curves from active galaxies
journal, November 2003

On the duty-cycle of γ-ray blazars: On the duty-cycle of γ-ray blazars
journal, August 2004

    Sort by:
    [ × clear filter / sort ]

    Works referencing / citing this record:

    Ten years of AGILE: the mission and scientific highlights
    journal, September 2019

    Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406
    journal, June 2013

    Discovery of TeV γ -ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
    journal, April 2013

    Testing the blazar sequence with the least luminous BL Lacertae objects
    journal, February 2016

    Luminous and high-frequency peaked blazars: the origin of the γ -ray emission from PKS 1424+240
    journal, October 2017

    Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    journal, May 2015

    • Aleksić, J.; Ansoldi, S.; Antonelli, L. A.
    • Monthly Notices of the Royal Astronomical Society, Vol. 450, Issue 4
    • DOI: 10.1093/mnras/stv811

    The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI
    journal, October 2018

    • Cao, Hong-Min; Frey, Sándor; Gabányi, Krisztina É
    • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 482, Issue 1
    • DOI: 10.1093/mnrasl/sly184

    The Blazar PG 1553+113 as a Binary System of Supermassive Black Holes
    journal, February 2018

    • Tavani, M.; Cavaliere, A.; Munar-Adrover, Pere
    • The Astrophysical Journal, Vol. 854, Issue 1
    • DOI: 10.3847/1538-4357/aaa3f4

    New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes
    journal, February 2020

    • Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.
    • The Astrophysical Journal Supplement Series, Vol. 247, Issue 1
    • DOI: 10.3847/1538-4365/ab5b98

    Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406
    text, January 2013

    • Abramowski, A.; Acero, F.; Aharonian, F.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/desy-2014-00641

    Gamma-ray blazar spectra with H.E.S.S. II mono analysis: the case of PKS 2155-304 and PG 1553+113
    text, January 2016

    • Abdalla, H.; Abramowski, A.; Aharonian, F.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2017-00438

    Gamma-ray blazar spectra with H.E.S.S. II mono analysis: The case of PKS 2155−304 and PG 1553+113
    journal, April 2017

    Discovery of TeV γ -ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
    text, January 2013

    • Collaboration, H. E. S. S.; Abramowski, A.; Acero, F.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/desy-2014-00637

    Probing the very high energy $\gamma$-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    text, January 2015

    • Aleksi, J.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2016-00403

    Luminous and high-frequency peaked blazars: the origin of the $\gamma$-ray emission from PKS 1424+240
    text, January 2017

    New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes
    text, January 2020

    • Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2020-01399

    Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    text, January 2015

    Discovery of high and very high-energy emission from the BL Lac object SHBL J001355.9-185406
    text, January 2013

    New hard-TeV extreme blazars detected with the MAGIC telescopes
    text, January 2019

      Sort by:
      [ × clear filter / sort ]

      Similar Records in DOE PAGES and OSTI.GOV collections: