W. Liller, Center for Astrophysics, communicates: "E. W. Gottlieb has discovered that this BL-Lac object is currently in an eruptive phase. The object, which was brought to our attention by H. R. Miller, Georgia State University, appears on the blue Palomar Sky Survey print at an estimated B ~ 20.0, and on archival Harvard plates it is usually fainter than B = 17.5. However, in the 1940s it reached B ~ 14.4; in Apr. 1974 it was seen at B ~ 14.2 and in Apr. 1975 at B ~ 15.3. Blue plates taken with the 155-cm reflector on 1976 Apr. 7 and 8 UT show it at B = 16.1 and 16.7, respectively. B2 1308+326 is one of the most variable BL-Lac objects known, and spectrographic and radio observations would now be desirable."
International Astronomical Union Circular
- Pub Date:
- April 1976