Spectroscopic observation of the transient ZTF19acfsteg/AT2019stm in M31
ATel #13231; Monika Soraisam (NCSA/UIUC), Chien-Hsiu Lee (NSF OIR Lab), Gautham Narayan (UIUC), Thomas Matheson (NSF OIR Lab), Abhijit Saha (NSF OIR Lab), Arizona-NOAO Temporal Analysis and Response to Events System (ANTARES) team
on 28 Oct 2019; 04:36 UT
Credential Certification: Monika Soraisam (soraisam@noao.edu)
Subjects: Optical, Cataclysmic Variable, Nova, Transient
We report the spectroscopic observation of the transient ZTF19acfsteg/AT2019stm in M31. It was flagged by a filter on the ANTARES alert-broker (https://antares.noao.edu/) customized to find promising stellar explosive events from the ZTF public alert stream. This transient was also reported in ATel #13206.
Name | Alternative name | RA (J2000) | Dec (J2000) | First detection: MJD, mag
ZTF19acfsteg | AT2019stm | 00:40:05.03 | 39:53:57.12 | 58774.160139, g~19.9+/-0.2
We obtained Gemini GMOS spectrum (2x150sec exposures) of this nova on 27 Oct 2019 UT through the ToO program GN-2019B-Q-221 (PI: Lee, C.-H.). The spectrum clearly shows H-alpha and OI emission lines, along with a faint trace of HeI at 7280Å. All these pieces of evidence confirm the nova nature of this source and that it is a fast declining nova, in line with the photometric observations. Its light curve can be accessed at https://antares.noao.edu/alerts/locus/6039949.
