Simultaneous multi-wavelength campaign on PKS&nbsp;2005-489 in a high state

Abramowski, A.

doi:10.1051/0004-6361/201016170

Simultaneous multi-wavelength campaign on PKS 2005-489 in a high state

Journal Article · Thu Sep 01 00:00:00 EDT 2011 · Astronomy and Astrophysics

DOI:https://doi.org/10.1051/0004-6361/201016170· OSTI ID:1357195

Abramowski, A. ^[1]

Univ. of Hamburg (Germany); et al.

The high-frequency peaked BL Lac object PKS 2005-489 was the target of amulti-wavelength campaignwith simultaneous observations in the TeV γ-ray (H.E.S.S.), GeV γ-ray (Fermi/LAT), X-ray (RXTE, Swift), UV (Swift) and optical (ATOM, Swift) bands. This campaign was carried out during a high flux state in the synchrotron regime. The flux in the optical and X-ray bands reached the level of the historical maxima. The hard GeV spectrum observed with Fermi/LAT connects well to the very high energy (VHE, E> 100 GeV) spectrum measured with H.E.S.S. with a peak energy between ~ 5 and 500 GeV. Compared to observations with contemporaneous coverage in the VHE and X-ray bands in 2004, the X-ray flux was ~ 50 times higher during the 2009 campaign while the TeV γ-ray flux shows marginal variation over the years. The spectral energy distribution during this multi-wavelength campaign was fit by a one zone synchrotron self-Compton model with a well determined cutoff in X-rays. The parameters of a one zone SSC model are inconsistent with variability time scales. The variability behaviour over years with the large changes in synchrotron emission and small changes in the inverse Compton emission does not warrant an interpretation within a one-zone SSC model despite an apparently satisfying fit to the broadband data in 2009.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: The Fermi LAT Collaboration; The H.E.S.S. Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1357195

Journal Information:: Astronomy and Astrophysics, Journal Name: Astronomy and Astrophysics Vol. 533; ISSN 0004-6361

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

References (37)

ATOM - an Automatic Telescope for Optical Monitoring Hauser, M.; Möllenhoff, C.; Pühlhofer, G. Astronomische Nachrichten, Vol. 325, Issue 6-8 https://doi.org/10.1002/asna.200410305	journal	October 2004
The Swift Ultra-Violet/Optical Telescope Roming, Peter W. A.; Kennedy, Thomas E.; Mason, Keith O. Space Science Reviews, Vol. 120, Issue 3-4 https://doi.org/10.1007/s11214-005-5095-4	journal	October 2005
The Swift X-Ray Telescope Burrows, David N.; Hill, J. E.; Nousek, J. A. Space Science Reviews, Vol. 120, Issue 3-4 https://doi.org/10.1007/s11214-005-5097-2	journal	October 2005
Calibration of cameras of the H.E.S.S. detector Aharonian, F.; Akhperjanian, A. G.; Aye, K. -M. Astroparticle Physics, Vol. 22, Issue 2 https://doi.org/10.1016/j.astropartphys.2004.06.006	journal	November 2004
A low level of extragalactic background light as revealed by γ-rays from blazars Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R. Nature, Vol. 440, Issue 7087 https://doi.org/10.1038/nature04680	journal	April 2006
Simultaneous multiwavelength observations of the second exceptional γ -ray flare of PKS 2155–304 in July 2006 Aharonian, F.; Akhperjanian, A. G.; Anton, G. Astronomy & Astrophysics, Vol. 502, Issue 3 https://doi.org/10.1051/0004-6361/200912128	journal	June 2009
PKS 2005-489 at VHE: four years of monitoring with HESS and simultaneous multi-wavelength observations Acero, F.; Aharonian, F.; Akhperjanian, A. G. Astronomy and Astrophysics, Vol. 511 https://doi.org/10.1051/0004-6361/200913073	journal	February 2010
The 0.1-200 keV spectrum of the blazar PKS 2005-489 during an active state Tagliaferri, G.; Ghisellini, G.; Giommi, P. Astronomy & Astrophysics, Vol. 368, Issue 1 https://doi.org/10.1051/0004-6361:20010011	journal	March 2001
The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections Kalberla, P. M. W.; Burton, W. B.; Hartmann, Dap Astronomy & Astrophysics, Vol. 440, Issue 2 https://doi.org/10.1051/0004-6361:20041864	journal	September 2005
Discovery of VHE gamma rays from PKS 2005–489 Aharonian, F.; Akhperjanian, A. G.; Aye, K. -M. Astronomy & Astrophysics, Vol. 436, Issue 2 https://doi.org/10.1051/0004-6361:200500113	journal	May 2005
High-frequency radio observations of the Kühr sample and the epoch-dependent luminosity function of flat-spectrum quasars Ricci, R.; Prandoni, I.; Gruppioni, C. Astronomy & Astrophysics, Vol. 445, Issue 2 https://doi.org/10.1051/0004-6361:20053797	journal	December 2005
Swift and infra-red observations of the blazar 3C 454.3 during the giant X-ray flare of May 2005 Giommi, P.; Blustin, A. J.; Capalbi, M. Astronomy & Astrophysics, Vol. 456, Issue 3 https://doi.org/10.1051/0004-6361:20064874	journal	September 2006
Observations of the Crab nebula with HESS Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R. Astronomy & Astrophysics, Vol. 457, Issue 3 https://doi.org/10.1051/0004-6361:20065351	journal	September 2006
Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity Franceschini, A.; Rodighiero, G.; Vaccari, M. Astronomy & Astrophysics, Vol. 487, Issue 3 https://doi.org/10.1051/0004-6361:200809691	journal	June 2008
Modelling the spectral response of the Swift -XRT CCD camera: experience learnt from in-flight calibration Godet, O.; Beardmore, A. P.; Abbey, A. F. Astronomy & Astrophysics, Vol. 494, Issue 2 https://doi.org/10.1051/0004-6361:200811157	journal	November 2008
A Radio Reference Frame Johnston, K. J.; Fey, A. L.; Zacharias, N. The Astronomical Journal, Vol. 110 https://doi.org/10.1086/117571	journal	August 1995
UBVRI passbands Bessell, M. S. Publications of the Astronomical Society of the Pacific, Vol. 102 https://doi.org/10.1086/132749	journal	October 1990
Galaxy Colors in Various Photometric Band Systems Fukugita, M.; Shimasaku, K.; Ichikawa, T. Publications of the Astronomical Society of the Pacific, Vol. 107 https://doi.org/10.1086/133643	journal	June 1995
Parameter estimation in astronomy through application of the likelihood ratio Cash, W. The Astrophysical Journal, Vol. 228 https://doi.org/10.1086/156922	journal	March 1979
Analysis methods for results in gamma-ray astronomy Li, T. -P.; Ma, Y. -Q. The Astrophysical Journal, Vol. 272 https://doi.org/10.1086/161295	journal	September 1983
Models for high-frequency radio outbursts in extragalactic sources, with application to the early 1983 millimeter-to-infrared flare of 3C 273 Marscher, A. P.; Gear, W. K. The Astrophysical Journal, Vol. 298 https://doi.org/10.1086/163592	journal	November 1985
The Likelihood Analysis of EGRET Data Mattox, J. R.; Bertsch, D. L.; Chiang, J. The Astrophysical Journal, Vol. 461 https://doi.org/10.1086/177068	journal	April 1996
The redshift of the BL Lacertae object PKS 2005-489 Falomo, R.; Maraschi, L.; Treves, A. The Astrophysical Journal, Vol. 318 https://doi.org/10.1086/184933	journal	July 1987
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds Schlegel, David J.; Finkbeiner, Douglas P.; Davis, Marc The Astrophysical Journal, Vol. 500, Issue 2 https://doi.org/10.1086/305772	journal	June 1998
EGRET Spectral Index and the Low‐Energy Peak Position in the Spectral Energy Distribution of EGRET‐detected Blazars Lin, Y. C.; Bertsch, D. L.; Bloom, S. D. The Astrophysical Journal, Vol. 525, Issue 1 https://doi.org/10.1086/307897	journal	November 1999
The Hubble Space Telescope Survey of BL Lacertae Objects. I. Surface Brightness Profiles, Magnitudes, and Radii of Host Galaxies Scarpa, Riccardo; Urry, C. Megan; Falomo, Renato The Astrophysical Journal, Vol. 532, Issue 2 https://doi.org/10.1086/308618	journal	April 2000
X-Ray Spectral Variability of PKS 2005−489 During the Spectacular 1998 November Flare Perlman, Eric S.; Madejski, Greg; Stocke, John T. The Astrophysical Journal, Vol. 523, Issue 1 https://doi.org/10.1086/312260	journal	September 1999
Near‐Infrared Observations of BL Lacertae Host Galaxies Cheung, C. C.; Urry, C. Megan; Scarpa, Riccardo The Astrophysical Journal, Vol. 599, Issue 1 https://doi.org/10.1086/379227	journal	December 2003
Multiwavelength Observations of Strong Flares from the TeV Blazar 1ES 1959+650 Krawczynski, H.; Hughes, S. B.; Horan, D. The Astrophysical Journal, Vol. 601, Issue 1 https://doi.org/10.1086/380393	journal	January 2004
Does the Blazar Gamma‐Ray Spectrum Harden with Increasing Flux? Analysis of 9 Years of EGRET Data Nandikotkur, Giridhar; Jahoda, Keith M.; Hartman, R. C. The Astrophysical Journal, Vol. 657, Issue 2 https://doi.org/10.1086/510795	journal	March 2007
Multiwavelength Observations of Markarian 421 in 2001 March: An Unprecedented View on the X‐Ray/TeV Correlated Variability Fossati, G.; Buckley, J. H.; Bond, I. H. The Astrophysical Journal, Vol. 677, Issue 2 https://doi.org/10.1086/527311	journal	April 2008
SIMULTANEOUS OBSERVATIONS OF PKS 2155–304 WITH HESS, FERMI , RXTE , AND ATOM: SPECTRAL ENERGY DISTRIBUTIONS AND VARIABILITY IN A LOW STATE Aharonian, F.; Akhperjanian, A. G.; Anton, G. The Astrophysical Journal, Vol. 696, Issue 2 https://doi.org/10.1088/0004-637X/696/2/L150	journal	April 2009
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION Atwood, W. B.; Abdo, A. A.; Ackermann, M. The Astrophysical Journal, Vol. 697, Issue 2 https://doi.org/10.1088/0004-637X/697/2/1071	journal	May 2009
FERMI OBSERVATIONS OF TeV-SELECTED ACTIVE GALACTIC NUCLEI Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal, Vol. 707, Issue 2 https://doi.org/10.1088/0004-637X/707/2/1310	journal	December 2009
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal Supplement Series, Vol. 188, Issue 2 https://doi.org/10.1088/0067-0049/188/2/405	journal	May 2010
ATCA Monitoring Observations of 202 Compact Radio Sources in Support of the VSOP AGN Survey Tingay, Steven J.; Jauncey, David L.; King, Edward A. Publications of the Astronomical Society of Japan, Vol. 55, Issue 2 https://doi.org/10.1093/pasj/55.2.351	journal	April 2003
Photometric calibration of the Swift ultraviolet/optical telescope: Photometric calibration of the Swift UVOT Poole, T. S.; Breeveld, A. A.; Page, M. J. Monthly Notices of the Royal Astronomical Society, Vol. 383, Issue 2 https://doi.org/10.1111/j.1365-2966.2007.12563.x	journal	December 2007

Cited By (8)

Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S. Abramowski, A.; Acero, F.; Aharonian, F. Astronomy & Astrophysics, Vol. 550 https://doi.org/10.1051/0004-6361/201220355	journal	January 2013
Spectroscopy of high-energy BL Lacertae objects with X-shooter on the VLT Pita, S.; Goldoni, P.; Boisson, C. Astronomy & Astrophysics, Vol. 565 https://doi.org/10.1051/0004-6361/201323071	journal	April 2014
Measurement of the EBL spectral energy distribution using the VHE γ -ray spectra of H.E.S.S. blazars Abdalla, H.; Abramowski, A.; Aharonian, F. Astronomy & Astrophysics, Vol. 606 https://doi.org/10.1051/0004-6361/201731200	journal	October 2017
Gamma-Rays from Blazars and the Extragalactic Background Light Costamante, Luigi International Journal of Modern Physics D, Vol. 22, Issue 13 https://doi.org/10.1142/s0218271813300255	journal	October 2013
Extremely Rapid X-Ray Flares of TeV Blazars in the RXTE Era Zhu, S. F.; Xue, Y. Q.; Brandt, W. N. The Astrophysical Journal, Vol. 853, Issue 1 https://doi.org/10.3847/1538-4357/aa9f21	journal	January 2018
Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S Collaboration, H. E. S. S.; Abramowski, A.; Acero, F. arXiv https://doi.org/10.48550/arxiv.1212.3409	text	January 2012
Gamma-rays from Blazars and the Extragalactic Background Light Costamante, Luigi arXiv https://doi.org/10.48550/arxiv.1309.0612	text	January 2013
Extremely rapid x-ray flares of tev blazars in the rxte era Zhu, S. F.; Xue, Y. Q.; Brandt, W. N. arXiv https://doi.org/10.48550/arxiv.1712.00459	text	January 2017

Similar Records

Test of models of the cosmic infrared background with multiwavelength observations of the blazar 1ES 1218+30.4 in 2009

Journal Article · Fri Jun 20 00:00:00 EDT 2014 · Astrophysical Journal · OSTI ID:22356561

A three-year multi-wavelength study of the very-high-energy γ-ray blazar 1ES 0229+200

Journal Article · Sun Feb 09 23:00:00 EST 2014 · Astrophysical Journal · OSTI ID:22348064

Discovery of hard-spectrum γ -ray emission from the BL Lacertae object 1ES 0414+009

Journal Article · Tue Jan 31 19:00:00 EST 2012 · Astronomy and Astrophysics · OSTI ID:1356756

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS

Simultaneous multi-wavelength campaign on PKS 2005-489 in a high state

Citation Formats

References (37)

Cited By (8)

Similar Records

Related Subjects