GRS 1915+105
Abstract
I. F. Mirabel, Service d'Astrophysique, Centre d'Etudes de Saclay; L. F. Rodriguez, Universidad Nacional Autonoma de Mexico; J. Marti, Department of Astronomy and Meteorology, University of Barcelona; R. Teyssier and J. Paul, Service d'Astrophysique, Centre d'Etudes de Saclay; and M. Auriere, Observatoire du Pic du Midi, communicate: "Inside the 3'.5 SIGMA error radius (Cordier et al., Compton Symp., St. Louis) of this x-ray transient, discovered by WATCH onboard GRANAT (IAUC 5590) and observed with a slow rise to maximum intensity by BATSE on the Compton Observatory (IAUC 5619), we have detected with the Very Large Array a radio-counterpart candidate at R.A. = 19h12m49s.97, Decl. = +10 51'25".6 +/- 0".5 ( equinox 1950.0). This source is time-variable: on 1992 Dec. 11, the 20-cm peak flux was 2.5 +/- 0.1 mJy; on 1993 Mar. 10, it was 5.0 +/- 0.1 mJy. R-band optical images obtained with the 2-m telescope at Pic du Midi during Apr. 19 and 20 show no star brighter than mag 21 at the position of the compact radio source. The nearest stars are > 4" away from the radio counterpart. Further radio observations at higher frequencies, as well as infrared observations in the H, J, and K bands, are in progress."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- April 1993
- Bibcode:
- 1993IAUC.5773....2M