Spectroscopy of the BHC Dip Source X1755-338 If it Returns to Outburst
Abstract
We propose to observe the Black Hole Candidate dip source X1755-338 should it return to an outburst state similar to that seen in the EXOSAT era of ~120 mCrab. During the outburst state, the source exhibits highly-energy independent dips which repeat every 4.4 hours. However, the source has been in a quiescent state since 1995 and so has not been studied with high quality instrumentation. Our prime goal is to study the energy independence of the dips and to see whether the photo-ionised absorber model, which successfully accounts for the spectral changes seen during dips from all the bright well-studied dippers observed by XMM-Newton, can also account for the X1755-338 dips. This may provide insights into differences between NS and BH systems since all the other dippers are known to contain neutron stars.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2010
- Bibcode:
- 2010xmm..prop....4P
- Keywords:
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- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- X1755-338