New outburst from the best intermediate mass black hole candidate HLX-1 in ESO 243-49: evidence for an approximate recurrence timescale of a year
Abstract
We report on new results from our current X-ray monitoring of the best intermediate mass black hole candidate, the Hyper Luminous X-ray source (HLX-1) in the galaxy ESO 243-49 with the Swift-XRT (Farrell et al. 2009, Nature, 460, 73, Wiersema et al. 2010, ApJL, 721, 102). The source displays spectral hysteresis (transitions from the low/hard state to the thermal state) consistent with those observed in Galactic BH binaries (GBHBs), but with a luminosity 10-100 larger (Godet et al.
- Publication:
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The Astronomer's Telegram
- Pub Date:
- August 2011
- Bibcode:
- 2011ATel.3569....1G
- Keywords:
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- X-ray;
- Transient