Independent Discovery of a Probable Nova in M31
ATel #16768; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), M. Zejda (DTPA, Masaryk University, Brno, Czech Republic), A. W. Shafter (SDSU)
on 12 Aug 2024; 18:34 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Allen W. Shafter (ashafter@sdsu.edu)
Subjects: Optical, Nova, Transient
We report the independent discovery of a probable nova found during our survey of the central region of M31. The object was discovered on a co-added 490-s Sloan g CMOS frame taken on 2024 Aug. 12.012 UT with the 0.8-m telescope at Zdanice. The object is also visible on a co-added 490-s Sloan r CMOS frame taken with the same instrumentation on Aug. 12.016 UT.
The object was independently discovered on Aug. 11.385 UT by the ZTF and on 11.800 UT by Z. Mai et al. and designated as PNV J00435777+4113357 = AT 2024ryu.
The object was designated by us as M31N 2024-08d and is located at R.A. = 0h43m57s.83, Decl. = +41o13'35".7 (equinox 2000.0), which is 829.0" east and 152.8" south of the center of M31 (see link to discovery image below).
The following magnitudes were obtained using the 0.8-m telescope at Zdanice (D80):
Date [UT] | Mag | Err | Filter | Telescope
2024-08-07.054 | >21.0 | | Sloan g | D80
2024-08-07.056 | >20.2 | | Sloan r | D80
2024-08-12.012 | 19.3 | 0.2 | Sloan g | D80
2024-08-12.016 | 19.2 | 0.15 | Sloan r | D80
As with all extragalactic novae, follow-up spectroscopic and photometric observations to confirm the nova's nature and determine its spectroscopic class and rate of decline (speed class) are encouraged.
Discovery image
