Sun, 06/26/2022 - 20:01
This is probably as good as place as any to mention that the active galaxy usually called B2 1308+326 has been very bright in recent weeks. Observation worldwide has shown unprecedented brightness in the R band, including some reported to the AID. See the report by Tom Balonek and his students for some context:
https://www.astronomerstelegram.org/?read=15474
A notional AAVSO chart shows no relevant comp stars. The recommendation would be use the following stars and Rc magnitudes:
B2 1308+326 C 13 10 35.51 +32 17 50.8 13.21
B2 1308+326 A 13 10 54.13 +32 18 40.0 12.70
B2 1308+326 B 13 10 57.61 +32 21 11.9 12.36
B2 1308+326 F 13 10 06.52 +32 19 20.6 14.02
\Brian
AU CVn is still on the rise tonight. The following Ic mean magnitudes were obtained at Burleith Observatory, Washington, DC (0.32-m PlaneWave CDK, STL1001e CCD, Astrodon Cousins I filter, 180-sec exposures). Ensemble photometry using (Smith, et al., AJ, 90, 1184,1985) comparisons A,B,C, check star F.
Mean UT Mean HJD Mean Ic standard error Number of observations
June 25.1046 2022 2459755.604572 12.860 (0.002) 39
June 26.1027 2022 2459756.602745 12.720 (0.003) 36
June 28.1021 2022. 2459758.602146 12.341 (0.001). 25
Rich Schmidt (SREB)