Further GINGA Observations of the New X-Ray Pulsar X1722--36
Abstract
We report on the results of a follow-up study of X1722--36, a new 413-s X-ray pulsar recently discovered with Ginga. The new Ginga observations reveal X-ray flaring activity on time scales down to a few hours and a very heavily absorbed X-ray spectrum (N_Hhspace {-4pt} ~ hspace {-4pt}10(23) H cm(-2) ). The pulse profile is roughly sinusoidal and shows no significant energy dependence. From a pulse timing analysis, we set the lower limits on the orbital period of the system and the mass of the primary star at 9 d and 15 MO , respectively.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- April 1990
- Bibcode:
- 1990PASJ...42..287T
- Keywords:
-
- B Stars;
- Binary Stars;
- Ginga Satellite;
- Pulsars;
- X Ray Binaries;
- Spaceborne Astronomy;
- Stellar Flares;
- X Ray Astronomy;
- X Ray Spectra;
- Astrophysics;
- BE STAR BINARIES;
- X-RAY BINARIES;
- X-RAY PULSARS