Swift Follow up observation of the transient source Fermi J1654-1055 (PMN J1632-1052)
ATel #8735; M. Ajello (Clemson University), D. Kocevski (GSFC/NASA), S. Buson (GSFC/NASA), R. Buehler (DESY/Zeuthen), M. Giomi (DESY/Zeuthen) on behalf of the Fermi Large Area Telescope Collaboration
on 25 Feb 2016; 21:04 UT
Credential Certification: Marco Ajello (majello@clemson.edu)
Subjects: X-ray, Gamma Ray, >GeV, AGN, Blazar, Transient
On February 25, 2016, Swift carried out a 2ks target of opportunity observation of the transient Fermi J1654-1055 (see ATel #8721). Only one source is clearly detected, within the LAT error circle, by the Swift X-ray telescope (XRT) at RA, Dec= 16h 32m 49.9s, -10d 52' 30.1" (J2000) with a 90 % uncertainty radius of 6.3 arcsec. The source is spatially coincident with the radio source PMN J1632-1052. The XRT source, well described by an absorbed power law with absorption consistent with the Galactic one, displays a hard spectrum with a photon index of (1.2+/-0.3) and a 1-10 keV flux of (8.2+/-1.6) 10-12 erg cm-2 s-1. The X-ray spectrum indicates this may be a flat-spectrum radio quasar.
Follow up observations of Fermi J1654-1055 at longer wavelengths are encouraged.
We thank the Swift team and the Swift PI for promptly accepting and scheduling the ToO observation.
