SIMBAD references

2019A&A...621A.134T - Astronomy and Astrophysics, volume 621A, 134-134 (2019/1-1)

Study of the X-ray pulsar IGR J19294+1816 with NuSTAR: Detection of cyclotron line and transition to accretion from the cold disk.

TSYGANKOV S.S., DOROSHENKO V., MUSHTUKOV A.A., LUTOVINOV A.A. and POUTANEN J.

Abstract (from CDS):

In the work we present the results of two deep broadband observations of the poorly studied X-ray pulsar IGR J19294+1816 obtained with the NuSTAR observatory. The source was observed during Type I outburst and in the quiescent state. In the bright state a cyclotron absorption line in the energy spectrum was discovered at Ecyc=42.8±0.7keV. Spectral and timing analysis prove the ongoing accretion also during the quiescent state of the source. Based on the long-term flux evolution, particularly on the transition of the source to the bright quiescent state with luminosity around 1035erg/s, we conclude that IGR J19294+1816 switched to the accretion from the "cold" accretion disk between Type I outbursts. We also report the updated orbital period of the system.

Abstract Copyright: © ESO 2019

Journal keyword(s): accretion - accretion disks - magnetic fields - stars: individual: IGR J19294+1816 - X-rays: binaries

Simbad objects: 3

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2021.05.19-05:07:58

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