The swift observations of BL Lacertae object 1ES 2344+514
Journal
Date Issued
2017
Author(s)
Abstract
We present the results based on the monitoring of the high energy peaked BL Lacertae object 1ES 2344+514 with the satellite Swift during 2005-2015. Our timing study shows that the source was highly variable on longer (weeks-to-months) time-scales with the 0.3-10 keV flux ranging by a factor of 13.3. The flux variability exhibited an erratic character, changing its amplitude and minimum flux level from flare to flare. In some epochs, an X-ray flare was accompanied by enhanced optical-UV activity, although the uncorrelated 0.3-10 keV and lower-frequency variabilities were also often seen. Our target was significantly passive on intra-day timescales compared to other HBLs. The logparabolic distribution of the X-ray emitting electrons and the underlying physical processes seem to be less important for this object in some epochs, since only seven out of the relatively rich spectra showed a curvature, while the majority of the 0.3-10 keV spectra fitted with a simple powerlaw well. The photon index varied on diverse timescales, and the source showed mainly a "harder-when-brighter" spectral evolution. In the hardness ratio-flux plane, 1ES 2344+514 showed both clockwise and counterclockwise loops, indicating a complex spectral evolution with the flux.
Volume
362
Issue
10
Issn Identifier
0004-640X
Ads BibCode
2017Ap&SS.362..196K
Rights
restricted
File(s)![Thumbnail Image]()
Loading...
Name
2017ApSS362_196K.pdf
Description
[Administrators only]
Size
1.08 MB
Format
Adobe PDF
Checksum (MD5)
c9906ab53f457d9e4d65b07657e22636