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ATEL # 992; R. Landi (INAF/IASF Bologna), J. Tueller (NASA/GSFC), C. Markwardt (UMD/NASA/GSFC), A. Hill (Univ. Southampton), and M.T. Fiocchi (INAF/IASF Rome)
on 7 Feb 2007; 16:42 UT
Password Certification: Raffaella Landi (firstname.lastname@example.org)
Subjects: X-ray, Gamma Ray, AGN, Stars
Four excesses (IGR J11567+3700, IGR J12488+3315, IGR J13371+1520 and IGR J13103+2001) detected by INTEGRAL/IBIS in a deep observation of the Coma region (Krivonos et al., 2005, ApJ, 625, 89) have recently been observed with the Swift/XRT X-ray telescope. Within the 4 arcmin IBIS error box we do not detect any X-ray source above 3 sigma confidence level. We further notice that none of the above excesses has been reported in the literature afterwards nor is listed in recent INTEGRAL/IBIS survey catalogs (Bird et al., 2007, ApJ Supp in press, astro-ph/0611493 ; Krivonos et al., 2007, astro-ph/0701836). We therefore conclude that they are probably spurious detections and do not correspond to real INTEGRAL sources.