X-Ray Nova in Sagittarius
Abstract
L. Kaluzienski and S. Holt, Goddard Space Flight Center, report the detection of a novalike outburst from a source in Sagittarius. The increase apparently commenced during Ariel-5 all-sky-monitor fine-mode observations of this region on Oct. 26, the 3-6-keV flux rising from a level of < 0.1 Crab on that date to ~ 0.5 Crab early on the 29th. Upper limits of ~ 0.07 Crab were obtained during fine-mode observations conducted during Oct. 18-20. The source is located at R.A. = 18h28m, Decl. = -24o.3 (equinox 1950.0), with a 90-percent-confidence error-circle radius of ~ 2o. The source was still bright when last observed on Nov. 4. It should be noted that the weak source 4U 1831-23 is located within the outer region of the error circle and thus cannot be excluded as the origin of the outburst.
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- November 1979
- Bibcode:
- 1979IAUC.3422....2K