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Identification of two new INTEGRAL hard X-ray sources IGR J19491-1035 and IGR J04221+4856

ATel #3382; R. Krivonos, S. Tsygankov (MPA, IKI), R. Burenin, M. Revnivtsev, A. Lutovinov (IKI)
on 27 May 2011; 13:43 UT
Credential Certification: Roman Krivonos (krivonos@mpa-garching.mpg.de)

Subjects: X-ray, AGN

During the ongoing all-sky survey with INTEGRAL observatory (Krivonos et al., A&A, 475, 775, 2007; A&A, 523, A61, 2010) we detected two new hard X-ray sources.

IGR J19491-1035: the source was detected at sky coordinates RA=297.28, Dec=-10.59 (J2000, ~4 arcmin uncertainty) with 17-60 keV flux 0.77+/-0.15 mCrab. The region of interest contains group of galaxies LDCE 1363 at redshift 0.02458 (Crook et al., ApJ, 655, 790, 2007). The follow-up Swift/XRT observations revealed the only source in this field at the position RA=19h49m08.69s, Dec=-10h34m34.46s (J2000, ~4 arcsec uncertainty) with an estimated 2-10 keV flux (7.8+/-0.6)x10^-12 erg cm^-2 s^-1. The source is spatially consistent with galaxy 2MASX J19490928-1034253. Its optical spectrum can be found in the 6dF Galaxy Survey (Jones et al., MNRAS, 355, 747, 2004; MNRAS, 399, 683, 2009). A series of broad Balmer emission lines as well as OIII 4959,5007 narrow emission lines are clearly detected in the spectrum. Therefore, this object can be identified as a Seyfert type 1 galaxy at z=0.02402.

IGR J04221+4856: the source was detected at position RA=65.53, Dec=48.95 (J2000, ~4 arcmin uncertainty) with 17-60 keV flux 0.73+/-0.15 mCrab. The bright ROSAT source 1RXS J042201.0+485610 is likely associated with IGR J04221+4856. Marti et al., (A&A, 413, 309-315, 2004) suggested the origin of the ROSAT source as likely Seyfert 1 galaxy at z=0.114.

We thank the Swift team for making observation possible.

7-Year INTEGRAL All-Sky Survey