INTEGRAL and Swift observations of the hard X-ray transient MAXI J1828-249

Abstract

In this paper we report on the observations performed with INTEGRAL and Swift of the first outburst detected from the hard X-ray transient MAXI J1828-249. During the first about two days of the outburst, the source was observed by MAXI to undergo a very rapid transition from a hard to a softer spectral state. While the hard state was not efficiently monitored because the transition occurred so rapidly, the evolution of the source outburst in the softer state was covered quasi-simultaneously in a broad energy range (0.6-150 keV) by the instruments on-board INTEGRAL and Swift. During these observations, the spectra measured from the source displayed both a prominent thermal emission with temperature kT 0.7 keV and a power-law hard component with a photon index gamma 2.2 extending to 200 keV. The properties of the source in the X-ray domain are reminiscent of those displayed by black hole transients during the soft intermediate state, which supports the association of MAXI J1828-249 with this class of objects.

arXiv comment5 pages, 5 figures, 2 tables. Accepter for publication in A&A

References in corpus (8)

• The Swift X-ray Telescope
• Towards a unified model for black hole X-ray binary jets
• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• The evolution of black hole states
• The INTEGRAL Science Data Centre (ISDC)
• Panchromatic study of GRB 060124: from precursor to afterglow
• A failed outburst of H1743-322
• The first outburst of the black hole candidate MAXI J1836-194 observed by INTEGRAL, Swift, and RXTE

Cited by in corpus (5)

• BlackCAT: A catalogue of stellar-mass black holes in X-ray transients
• The gas-to-extinction ratio and the gas distribution in the Galaxy
• The INTEGRAL view on Black Hole X-ray Binaries
• X-ray and Optical Observations of the Black Hole Candidate MAXI J1828-249
• Investigation of the Outburst Activity of the Black Hole Candidate GRS 1739-278