Swift XRT/UVOT follow-up of blazar PKS 1118-056 after a gamma-ray flare

Details Swift XRT/UVOT follow-up of blazar PKS 1118-056 after a gamma-ray flare Swift XRT/UVOT follow-up of blazar PKS 1118-056 after a gamma-ray flare

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.1943....1c&link_type=abstract

The Astronomer's Telegram, #1943

Astronomy and Astrophysics

Astronomy

Optical, X-Ray, Agn

Scientific paper

Following the Fermi-LAT detection of a GeV flare from the blazar PKS 1118-056 (z=1.297) on Feb 17th (ATEL #1932), Swift observations were obtained on Feb 18th, 20th, and 22nd. These observations confirm that the blazar is also in a high X-ray and optical state. The blazar is well detected in each XRT observation (2.5-3.0 ks exposures). Combining the three XRT exposures, the data are well fit by a power law with a photon index Gamma=1.37 +/- 0.15 and an average 0.3-10 keV flux = 2.3e-12 erg/cm2/s (unabsorbed assuming Galactic NH = 3.5e20 cm-2).

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