Chandra observes IGR J17497-2821
ATel #907; A. Paizis (IASF Milano), M. A. Nowak (MIT-CXC), J. Rodriguez (CEA Saclay), J. Wilms (Department of Physics, University of Warwick), T. J.-L. Courvoisier (ISDC Geneva), M. Del Santo, P. Ubertini (IASF Roma), K. Ebisawa (ISAS, Japan)
on 3 Oct 2006; 12:17 UT
Credential Certification: Adamantia Paizis (firstname.lastname@example.org)
Subjects: Radio, Far-Infra-Red, Infra-Red, Optical, X-ray, Gamma Ray, A Comment, Binary, Black Hole, Nova, Neutron Star, Transient, Variables, Pulsar
On October 1st, 17:42 UT, Chandra has performed a 20ksec HETGS
observation of the source IGR J17497-2821 recently discovered by
INTEGRAL (Soldi et al., ATEL #885). Our preliminary position estimate is
(J2000) RA: 17 49 38.04, Dec: -28 21 17.4.
As the source is quite bright, the positioning reaches the Chandra
absolute astrometric accuracy that is usually better than 1". Thus our
reported position is expected to be accurate to within this value,
dominated by current systematic uncertainties which are likely to improve
with further analysis.
Our position is consistent with the Swift refined position by Kennea et al
(ATEL #900, 0.94" away) and our improved error circle allows, among all
the currently proposed counterparts (Chaty et al., ATEL #897, #906) only
"Candidate 1" at RA=17 49 38.08, DEC=-28 21 17.6 (0.57" apart, Chaty et
al., ATEL #906) as the most probable counterpart of IGR J17497-2821.
Preliminary analysis shows the source to be at 3.1x10^-10 ergs cm^-2 s^-1
in the 1-8 keV band with N_h = 4.2+/-0.1 10^22 cm^-2 and Gamma = 1.15+/-0.05.
More details will be given in a forthcoming paper.
We thank the INTEGRAL Science Data Centre staff and in particular Simona
Soldi, Nami Mowlavi and Simon Shaw as well as Erik Kuulkers (ESA/ESAC)
for keeping us up to date on the near real time source behavior as seen
in our INTEGRAL observations.