Swift, INTEGRAL, RXTE, and Spitzer Reveal IGR J16283-4838
Gehrels, N.; Rodriguez, J.; Mowlavi, N.; Kennea, J. A.; Burrows, D. N.; Paizis, A.; Barthelmy, S. D.; Beckmann, V.; Soldi, S.; Markwardt, C.; Nousek, J.; Chester, M.
United States, Switzerland, Italy, France
Abstract
We present the first combined study of the recently discovered source IGR J16283-4838 with Swift, INTEGRAL, and RXTE. The source, discovered by INTEGRAL on 2005 April 7, shows a highly absorbed [variable NH=(0.4-1.7)×1023 cm-2] and flat (Γ~1) spectrum in the Swift XRT and RXTE PCA data. No optical counterpart is detectable (V>20 mag), but a possible infrared counterpart within the Swift XRT error radius is detected in the 2MASS and Spitzer GLIMPSE. The observations suggest that IGR J16283-4838 is a high-mass X-ray binary (HMXB) containing a neutron star embedded in Compton thick material. This makes IGR J16283-4838 a member of the class of highly absorbed HMXBs, discovered by INTEGRAL.