The X-ray transient 4U 1630-47 transitioned from the hard to soft spectral state
Abstract
We report on X-ray observations of the black hole X-ray binary 4U 1630-47 made with the Neil Gehrels Swift Observatory (Swift) X-ray telescope (XRT) on MJD 58940, and MAXI (The MAXI Mission on the ISS: Science and Instruments for Monitoring All-Sky X-ray Images, Matsuoka, M. et al., PASJ, 61, 999, 2009) on MJD 58920-58924, roughly 20 days prior, showing the source transitioned from the hard to the soft spectral state during this 20 day period.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- April 2020
- Bibcode:
- 2020ATel13623....1C
- Keywords:
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- Binary;
- Black Hole