Orbital Period of Swift J2218.5+1925, A New Magnetic Cataclysmic Variable
Abstract
The Swift XRT observed a highly variable X-ray source at (J2000.0) R.A. = 22h 18m 32.7s, decl.= +19d 25' 19" on 2009 August 2 and 4, for exposure times of 4885 and 4542 s, respectively. The average count rate was 0.14 s^-1 in the 0.3-10 keV band. Fits to an absorbed power law give photon index 1.05 +/- 0.10, NH < 9.e20 cm^-2, and average 0.3-10 keV flux of 9.5e-12 erg cm^-2 s^-1. This source can be identified with 1RXS J221832.8+192527 in the ROSAT All-Sky Survey Bright Source Catalogue.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- August 2009
- Bibcode:
- 2009ATel.2177....1T
- Keywords:
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- Optical;
- X-ray;
- Binaries;
- Cataclysmic Variables;
- Variables;
- Stars