Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002

Abstract

In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray Timing Explorer, the Bordeaux Optical Observatory, and the University of Michigan Radio Astrophysical Observatory. We present the multiwavelength data taken from May 2, 2003 to June 7, 2003 and compare the source characteristics with those measured during observations taken during the years 2000 and 2002. The X-ray observations gave a data set with high signal-to-noise light curves and energy spectra; however, the gamma-ray observations did not reveal a major TeV gamma-ray flare. Furthermore, we find that the radio and optical fluxes do not show statistically significant deviations from those measured during the 2002 flaring periods. While the X-ray flux and X-ray photon index appear correlated during subsequent observations, the apparent correlation evolved significantly between the years 2000, 2002, and 2003. We discuss the implications of this finding for the mechanism that causes the flaring activity.

arXiv comment17 pages, 6 figures, 2 tables

References in corpus (12)

• Non-linear X-ray variability in X-ray binaries and active galaxies
• Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650
• BeppoSAX Observations of Unprecedented Synchrotron Activity in the BL Lac Object Mkn 501
• Implications of Cosmological Gamma-Ray Absorption - I.Evolution of the Metagalactic Radiation Field
• Detection of TeV Gamma Rays from the BL Lac Object 1ES1959+650 with the Whipple 10m Telescope
• Observation of VHE gamma-ray emission from the Active Galactic Nucleus 1ES1959+650 using the MAGIC telecope
• High Energy Neutrinos from the TeV Blazar 1ES 1959+650
• A hadronic synchrotron mirror model for the "orphan" TeV flare in 1ES 1959+650
• Spectrum of Very High Energy Gamma-Rays from the blazar 1ES1959+650 during Flaring Activity in 2002
• Upper Limits on the Extragalactic Background Light from the Gamma-Ray Spectra of Blazars
• Observation of X-ray variability in the BL Lac object 1ES1959+65
• X-Ray Spectral Variability of Extreme BL Lac AGN H1426+428

Cited by in corpus (15)

• X-Ray and Gamma-Ray Polarization in Leptonic and Hadronic Jet Models of Blazars
• Simultaneous multiwavelength observations of the blazar 1ES1959+650 at a low TeV flux
• SWIFT observations of TeV BL Lac objects
• The Parsec-Scale Jets of the TeV Blazars H 1426+428, 1ES 1959+650, and PKS 2155-304: 2001-2004
• Spectral Survey of X-Ray Bright Active Galactic Nuclei from the Rossi X-ray Timing Explorer
• Hadronic-Origin orphan TeV flare from the 1ES 1959+650
• Testing two-component models on very-high-energy gamma-ray emitting BL Lac objects
• Long-term optical polarization variability of the tev blazar 1es~1959+650
• Broadband study of blazar 1ES 1959+650 during flaring state in 2016
• Some possible sources of IceCube TeV-PeV neutrino events
• X-ray spectral variations of synchrotron peak in BL Lacs
• A two-zone photohadronic interpretation of the EHBL-like behavior of the 2016 multi-TeV flares of 1ES 1959+650
• AstroSat observation of the HBL 1ES 1959+650 during its October 2017 flaring
• X-Ray Spectral Variability of Thirteen TeV High Energy Peaked Blazars with XMM-Newton
• Status of Very High Energy gamma-ray Astronomy as of early 2008