Detection of strong H-alpha emission from recent nova candidates in M31
ATel #16716; A. Valcheva (University of Sofia, Bulgaria), A. Kostov (IA and NAO, BAS, Bulgaria), E. Ovcharov, P. Nedialkov (University of Sofia, Bulgaria)
on 17 Jul 2024; 21:19 UT
Credential Certification: Antoniya Valcheva (valcheva@phys.uni-sofia.bg)
Subjects: Optical, Nova, Transient
We report the detection of strong H-alpha emission from four recent nova candidates in M31: AT 2024pbp (= PNV J00424415+4116276), discovered on 2024/07/07.136 UT by Jingyuan Zhao; AT 2024nct (= PNV J00425070+4119381), discovered on 2024/06/29.227 UT by Jingyuan Zhao; AT 2024lwy (= PSP24Q) (= PNV J00425282+4115251), discovered on 2024/06/20.878 UT by Xingming Observatory Sky Survey (XOSS) ; AT 2024ikt (= ZTF24aamrdsj), discovered on 2024/05/07.489 UT by Zwicky Transient Facility (ZTF).
Our observations were carried out in H-alpha narrowband filter (FWHM of 3 nm) with the focal reducer FoReRo2 mounted on the 2m RCC telescope at Rozhen NAO, Bulgaria on 2024 July 08.9972 UT. H-alpha magnitudes were obtained from 3x300 sec co-added frames and are shown below:
AT2024pbp, Halpha = 15.98 ± 0.06 mag
AT2024nct, Halpha = 15.51 ± 0.02 mag
AT2024lwy, Halpha = 15.73 ± 0.02 mag
AT2024ikt, Halpha = 15.55 ± 0.02 mag
The strong H-alpha emission detected from AT2024pbp, AT2024nct, AT2024lwy, and AT2024ikt confirms that the transients are novae in M31. Spectroscopic observations can reveal the novae's spectroscopic class.
In addition, our narrowband observations showed that nova AT 2024ccb (= PNV J00425721+4119038), discovered on 2024/02/10.594 UT by Xingming Observatory Sky Survey (XOSS) is still visible in H-alpha with a magnitude of 17.31 ± 0.05 mag.
H-alpha image can be seen (here).
This study was financially supported by the National RI Roadmap Project DO1-326/04.12.2023 with Ministry of Education and Science of the Republic of Bulgaria.
