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| Miscellaneous :
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| Stephen et al. 2005:
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| Brandt et al. 2006 Atel 778:
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Chenevez et al. 2007 A&A:
- XMM refinement of the X-ray position
- rules out the counterpart suggested by Stephen et al. based
on the position of the Rosat object.
- analysis of 2 bursts, which were soft and for which no emission is detected
above 20 keV.
- First burst is well fitted with a single bb model with kT=1.4keV.
- Second (and longer) one analysis of the peak spectrum and the decay phase.
A single bb fits the data well, with temperature decreasing from 1.6 keV to 1.2 keV.
- Upper limit to the distance of 14.5kpc.
- Second burst is more unusual than first and may be pure He ignition.
- Conclude that the long burst results from the ignition of a large pile of He under
a steady H burning shell. The short burst occur when a weak hydrogen flash tirggered
a mixed H/He burst.
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Zolotukhin 2009 ATel 2032:
- single point source within XMM error box seen in the I-band image
- I = 19.1
- Another I=19.7 object 2.7"
away from the centre of XMM-Newton position => cannot
be completely ruled out as the counterpart
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Ratti et al. 2010:
- Chandra+optical observations
- 11 additional objects in optical images
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