Confirmation and Photometry of Five Optical Nova Candidates in M81
ATel #3888; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), D. Fohring (ING, La Palma, Spain/U. of Durham, UK), R. Karjalainen (ING, La Palma, Spain)
on 26 Jan 2012; 06:01 UT
Credential Certification: Allen W. Shafter (aws@nova.sdsu.edu)
Subjects: Optical, Nova, Transient
We report confirmation of five nova candidates in M81 discovered on 2012
Jan. 9.102 UT (ATEL #3871). On Jan. 21.196 UT we obtained four 400-s
narrow-band H-alpha CCD frames with the 2.5-m Isaac Newton Telescope + WFC
at La Palma under ~1.5" seeing.
The single frames were co-added and the co-added image was used for
confirmation of the nova candidates and the photometry.
The candidates (except PNV J09553792+6902498, which is visible at the limit)
are well visible on the co-added image as well as nova PNV J09553266+6906072
(ATEL #3735, #3770, and #3871) and PNV J09553281+6902028 (ATEL #3867).
The following magnitudes were obtained:
TOCP designation CBAT designation H-alpha mag
PNV J09553266+6906072 2011-11a? 20.43 +/- 0.07
PNV J09553281+6902028 2011-12a? 19.95 +/- 0.07
PNV J09553278+6902139 2012-01a? 19.43 +/- 0.05
PNV J09555380+6903383 2012-01b? 19.38 +/- 0.05
PNV J09555778+6902041 2012-01c? 21.0 +/- 0.15
PNV J09553792+6902498 2012-01d? 21.8 +/- 0.3
PNV J09553560+6904154 2012-01e? 20.4 +/- 0.25
