Swift observations of BL Lacertae
Author(s)
Sokolovsky, K. V.
D'Ammando, F.
Cutini, Sara
Date Issued
2011-05-01
Mission(s)
Abstract
Following the increase in gamma-ray, optical and near-infrared activity of BL Lacertae reported in ATel #3368, #3371, and #3375 we have initiated Swift monitoring observations of the source with 1ks-long pointings planned once every 3 days until 2011 June 04. The first observation of the series was conducted on May 23 16 55 UT and is described here. The 0.3-10 keV X-ray spectrum of BL Lacertae observed by Swift/XRT can be described by an absorbed (N_HI = 3.6x1021 cm-2, Ravasio et al.