SUMMARY OF PROPOSAL 52034
NASA-GSFC / USRA
GREENBELT
MD USA 20771
Tel: 301-286-9447 Fax: 301-286-1684
Medium: 4GBDAT
Subject: CATACLYSMIC VARIABLES
SPECTROSCOPIC AND ECLIPSE STUDIES OF THE UNIQUE X-RAY SOURCE UW CRB (MS1603.6+2600)
ABSTRACT
UW CrB (MS1603.6+2600) was discovered during the Einstein Extended Medium Sensitivity Survey, and was optically identified with a 111 min eclipsing binary. Its nature remains unresolved: it is either an unusual low-mass X-ray binary (LMXB) or an unusual cataclysmic variable (CV). A ROSAT observation in the archive suggests a probable X-ray eclipse, but the low signal to noise ratio of the light curve prevents us from making a more definitive statement. Spectroscopy using the ROSAT data is also inconclusive in terms of the nature of this X-ray source. We request a 60 ks ASCA observation with which to investigate the eclipse in detail and to establish the shape of the X-ray spectrum, to be compared with those of known LMXBs and CVs of various sub-types.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| ALAN SMALE | NASA-GSFC/USRA | USA |
| CAROLINE STAHLE | NASA-GSFC | USA |
| ERIC SCHLEGEL | SAO | USA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)UW CRB | 3 | 241.4408 | 25.8625 | 60 ks | N | Y | P | 0.04000 | 1 |