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Swift Observations of GAIA17dev and GAIA17dez

ATel #11142; Dirk Grupe (Morehead State University) Norbert Schartel (ESA - ESAC) and S. Komossa (MPI f. Radioastronomie)
on 8 Jan 2018; 17:12 UT
Credential Certification: Dirk Grupe (dgrupe007@gmail.com)

Subjects: Optical, Ultra-Violet, X-ray, AGN

We report of Swift observations of the Active Galactic Nuclei GAIA 17dev and GAIA 17dez which were detected by GAIA in an optically bright state (A. Delgado et al. TNS AT report 15273 and 15277, respectively). Swift observed GAIA 17dev (SDSS J141909.26+060328.4) on 2017 December 22 and 28 for a total 1111s. Applying the method described in Kraft et al. (1991, ApJ 374, 344) we found a 3 sigma upper limit in the 0.3-10 keV band with the Swift XRT of 8.7e-3 counts/s which is equivalent to an observed flux in the 0.3-10 keV band of about 4.5e-16 W m^-2. We did not detect the source in the UVOT and found the following 3 sigma upper limits (exposure times given in s) in the Vega system: V>18.04 mag (63 s), B>19.22 mag (63s), U>18.88 mag (63s), W1>19.23 mag (126 s), M2>19.44 mag (178s), W2>19.98 mag (256s). The Galactic reddening in the direction of GAIA 17dev is E(B-V) = 0.020 (Schafly & Finkbeiner 2011, ApJ 737, 103). GAIA 17dez (3FGL J1159.2-2141) was observed by Swift on 2017 December 26 for 759s. The source is clearly detectd in the 0.3-10 keV band at a level of (9.1+4.0-3.7)e-3 counts/s in the Swift XRT which is equivalent to an absorbed flux of (4.5+2.0-1.8)e-16 W m^-2. In the UVOT we found the following magnitudes in the Vega system: V=17.96+/-0.36 (63s), B=18.12+/-0.15 (63), U=17.87+/-0.17 (63s), W1=17.53+/-0.13 (125s), M2=17.53+/-0.14 (161s), W2=17.73+/-0.11 (251s). These values were not corrected for Galactic reddening which in the direction of Gaia 17dev is E(B-V) = 0.033 (Schafly & Finkbeiner 2011).