RA/DEC (2000)
00:42:37.880 +41:12:49.10
10.657833 +41.213639
Type
Nova
Redshift
Reporting Group
XOSS
Discovering Data Source
XOSS
Discovery Date
2022-11-01 14:54:45.504
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
19.7
Filter
Clear-
Reporter/s
Mi Zhang, Leiming Tang, Jingyuan Zhao, Yuqing Ren, Jianlin Xu, Wenjie Zhou, Jiangao Ruan, Guoyou Sun, Xing Gao and the PSP team

Spectra

 AT_2022abzg - 2023-02-08 10:11:15 Other / Other (None)z=
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   Binning factor: (rounded to nearest integer >1)
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Light curves

 Other_Other_Clear
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
14468 2023-02-08 10:11:15 Other / Other 2700 Kenta Taguchi Kenta Taguchi None tns_2022abzg_2023-02-08_10-11-15_Other_Other.dat tns_2022abzg_2023-02-08_10-11-15_Other_Other.fits Object We performed the follow-up spectroscopic observation using the KOOLS-IFU attached to the 3.8-m Seimei telescope at Okayama Observatory. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8900 A.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- Other_Other 2022-11-01 14:54:46 - 2022-11-29 14:03:53 2459885.12136 - 2459913.08603 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
319946 2022-11-29 14:03:53 2459913.08603 18.6 20 VegaMag Clear- Other_Other 300 Xing Gao
319945 2022-11-01 14:54:46 2459885.12136 19.7 20.5 VegaMag Clear- Other_Other 300 Xing Gao
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
166009 2022-11-29 15:43:52 Mi Zhang Mi Zhang,Leiming Tang,Jingyuan Zhao et al. XOSS XOSS 00:42:37.880 +41:12:49.10 2022-11-01 14:54:45.504 19.7 Clear- PNV M31 XM90MZ XOSS Nova candidate or known VS classified by XOSS. Details can be found at http://xjltp.china-vo.org/xm90mz.html 2022TNSTR3483....1Z N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
14394 2023-02-08 14:52:30 Kenta Taguchi Kenta Taguchi (Kyoto University) None Nova 1 Our spectrum is dominated by a blue continuum on which strong emission lines of H alpha and beta are there. The FWHM of the H alpha line is ~ 24 A or ~ 1100 km/s. From these features, we classify it as a nova. 2023TNSCR.311....1T
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
14468 2023-02-08 10:11:15 Other / Other 2700 Kenta Taguchi Kenta Taguchi None tns_2022abzg_2023-02-08_10-11-15_Other_Other.dat tns_2022abzg_2023-02-08_10-11-15_Other_Other.fits Object We performed the follow-up spectroscopic observation using the KOOLS-IFU attached to the 3.8-m Seimei telescope at Okayama Observatory. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8900 A.

Comments

George
Carey

AT2022abzg Re-brightening

Magnitude 18.2 at 2023 02 07.802.  It was undetectable by my equipment on January 31st 2023.

Dave
Balam

DAO detection on UT Dec. 16

This transient was located on CCD images obtained at the Dominion Astrophysical (DAO/NRC) with the 1.82-m Plaskett telescope on UT 2022 Dec. 16.118 (exposure 3 x 60 sec in SDSS g' filter. Differentila photometry from a nearby star of similar brightness yields g' = 20.44 +/- 0.11. Our detection mosaic is attached below (current image, reference(2018) & subtraction). Each stamp is 4'x4'

Róbert
Fidrich

correction: more likey symbiotic nova

The recent multicolor photometry by the XOSS team shows this is a blue star. Thus it's probably a symbiotic nova.

Róbert
Fidrich

Verly likely an LPV

This star was clearly visible on a 300s CCD image made using an Rc filter remotely with 0.6m robotic telescope of Burke-Gaffney Observatory at 2022 november 25.0785UT. This object is very likely identical the very red star LGGS J004237.90+411248.9. The Spitzer photometry of ∼1million stars in M31 & 15 gal. (Khan, 2017) catalogue lists a bright infrared source at the given position. In the light of these information this is very likely an LPV (or a symbiotic variable in outburst).