IGR J16393-4643: a new heavily-obscured X-ray pulsar

An analysis of the high-energy emission from IGR J16393-4643 (=AXJ1639.0-4642) is presented using data from INTEGRAL and XMM-Newton. The source is persistent in the 20-40 keV band at an average flux of 5.1 x 10(-11) erg cm(-2) s(-1), with variations in intensity by at least an order of magnitude. A pulse period of 912.0 +/- 0.1 s was discovered in the ISGRI and EPIC light curves. The source spectrum is a strongly-absorbed (N-H = (2.5 +/- 0.2) x 10(23) cm(-2)) power law that features a high-energy cutoff above 10 keV. Two iron emission lines at 6.4 and 7.1 keV, an iron absorption edge greater than or similar to 7.1 keV, and a soft excess emission of 7 x 10(-15) erg cm(-2) s(-1) between 0.5-2 keV, are detected in the EPIC spectrum. The shape of the spectrum does not change with the pulse. Its persistence, pulsation, and spectrum place IGR J16393-4643 among the class of heavily-absorbed HMXBs. The improved position from EPIC is RA (J2000) = 16(h)39(m)05.4(s) and Dec = -46 degrees 42'12 '' (4 '' uncertainty) which is compatible with that of 2MASS J16390535-4642137.