H-alpha detection of AT2020aapw, AT2020aafw, AT2020yky and AT2020vak novae in M31
ATel #14212; A. Valcheva (Sofia University, Bulgaria), M. Minev (Sofia University, Bulgaria), E. Ovcharov (Sofia Univeristy, Bulgaria), P. Nedialkov (Sofia University, Bulgaria)
on 24 Nov 2020; 18:58 UT
Credential Certification: Evgeni Ovcharov (evgeni@phys.uni-sofia.bg)
Subjects: Optical, Nova, Transient
We report H-alpha photometry of the recent novae in M31 - AT2020aapw (ATel #14204), AT2020aafw (ATel #14183), AT2020yky (ATEL #14150) and AT2020vak (ATEL #14121, ATEL #14073, ATEL #14109). The observations in narrowband H-alpha (FWHM of 3 nm) and R-band were performed with the FoReRo2 focal reducer at the 2m RCC telescope at NAO Rozhen, Bulgaria. Photometric magnitudes were obtained from 3x300 sec co-added H-alpha and 3x180 sec co-added R-band images (see the links below). All photometric information is summarized here:
2020 Nov 22.826 UT | 2020 Nov 22.836 UT
# Object | H-alpha mag | R mag
AT2020aapw | 15.81 +/- 0.02 | 18.01 +/- 0.02
2020 Nov 22.812 UT | 2020 Nov 22.799 UT
# Object | H-alpha mag | R mag
AT2020aafw 15.29 +/- 0.03 | 18.3 +/- 0.2
AT2020yky 16.36 +/- 0.04 | 19.4 +/- 0.1
AT2020vak 16.04 +/- 0.03 | > 19.5
The presence of strong H-alpha emission for AT2020aapw, AT2020yky and AT2020vak novae is consistent with their spectroscopic classification reported in ATEL #14204, ATEL #14150 and ATEL #14121, respectively.
AT2020aafw (ATEL #14183) candidate also shows strong H-alpha emission and a relatively faint mag in R-band and this support the classification of the transient as a nova.
Field1 images, Field2 images
The work was partially supported by the Ministry of Education and Science of the Republic of Bulgaria, National RI Roadmap Project DO1-277/16.12.2019 and NSF Bulgaria grant DN18/10-11.12.2017.
