Multiwavelength Observations of the Extreme X-Ray Selected BL Lac Object PG 1553+11 (1ES 1553+113)

Abstract

PG 1553+11 was the target of a coordinated three week multiwavelength campaign during 2003 April and May. A significant X-ray flare was observed during the second half of this campaign. Although no optical flare was recorded during the X-ray campaign, optical observations obtained immediately prior to the campaign displayed a higher flux than that recorded during the campaign. An optical flare was observed a few days after the end of the X-ray campaign and may be related to the X-ray flare. Radio observations were made at three frequencies, with no significant changes in flux detected near the times of the optical and X-ray flares. The spectral energy distributions and flux ratios in different wavebands observed for this object are compared to other X-ray selected blazars to demonstrate how PG 1553+11 is an extreme member of this group.

arXiv comment28 pages, 4 figures, 7 tables. Accepted for publication in AJ

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Cited by in corpus (13)

• Optical Flux and Spectral Variability of Blazars
• The 2012 flare of PG 1553+113 seen with H.E.S.S. and Fermi-LAT
• Multi-band optical variability of three TeV Blazars on Diverse Timescales
• Fermi Observations of the Very Hard Gamma-ray Blazar PG 1553+113
• Optical Flux and Spectral Variability of the TeV blazar PG 1553+113
• A Hard X-Ray View of Two Distant VHE Blazars: 1ES 1101-232 and 1ES 1553+113
• Multi-band behaviour of the TeV blazar PG 1553+113 in optical range on diverse timescales
• Multi-band Variability of the TeV Blazar PG 1553+113 with XMM-Newton
• Polarization and photometric observations of the gamma-ray blazar PG 1553+113
• Constraining the PG 1553+113 binary hypothesis: interpreting hints of a new, 22-year period
• New Multiwavelength Observations of PKS 2155-304 and Implications for the Coordinated Variability Patterns of Blazars
• Catching profound optical flares in blazars
• The Discovery of Soft X-ray Loud Broad Absorption Line Quasars