XTE J0111.2-7317
Abstract
D. Chakrabarty, A. M. Levine, and G. W. Clark, Massachusetts Institute of Technology; and T. Takeshima, Goddard Space Flight Center, NASA, and Universities Space Research Association, write: "Multiple observations of the SMC X-1 field with the Proportional Counter Array (PCA) on the Rossi X-ray Timing Explorer between Oct. 29 and Nov. 7 have revealed a previously unknown 31-s x-ray pulsar, designated XTE J0111.2-7317, about 30' from SMC X-1. Raster scans of the region on Nov. 6 and 7 have yielded the following position for the new pulsar: R.A. = 1h11m.2, Decl. = -73o17'.4 (equinox 2000.0), with an error radius of 1'.5 (90-percent confidence). The 2-10-keV x-ray intensities of XTE J0111.2-7317 and SMC X-1 on Nov. 6.6 UT were 36(7) and 51(4) mCrab, respectively, and the pulsed fraction of XTE J0111.2-7317 was roughly 45 percent. If XTE J0111.2-7317 is located in the SMC, its x-ray intensity implies a luminosity of order 10E38 erg/s. The source was not detected during a series of six PCA observations of the field between Oct. 16 and 27. Observations at other wavelengths are encouraged in order to identify the binary companion."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- November 1998
- Bibcode:
- 1998IAUC.7048....1C