2025kvc | Transient Name Server

RA/DEC (2000)

00:42:22.999 +41:16:19.26

10.595829 +41.2720161

Type

Nova

Redshift

0

Discovery Report Classification Report

Reporting Group

ROTS

Discovering Data Source

None

Discovery Date

2025-05-20 03:39:41.184

TNS AT

Y

Public

Y

Host Name

M31

Host Redshift

-0.001

Discovery Mag

18.09

Filter

Clear-

Reporter/s

Ziyang Mai, Jingyuan Zhao, Jianlin Xu, Mi Zhang

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

GOTO-N_GOTO-2_L

▌

P48_ZTF-Cam_r

▌

Other_Other_Clear

Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)

Spectra

Select	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
	21196	2025-05-31 01:20:00	BL41 / FOSC-E5535	1800	Claudio Balcon	Claudio Balcon	None	tns_2025kvc_2025-05-31_01-20-00_BL41_FOSC-E5535_None.dat	tns_2025kvc_2025-05-31_01-20-00_BL41_FOSC-E5535_None.fit	Object
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), ▌Show H at z=v_exp= km/s ▌Show He at z=v_exp= km/s ▌Show He II at z=v_exp= km/s ▌Show C II at z=v_exp= km/s ▌Show C III at z=v_exp= km/s ▌Show C IV at z=v_exp= km/s ▌Show N II at z=v_exp= km/s ▌Show N III at z=v_exp= km/s ▌Show N IV at z=v_exp= km/s ▌Show N V at z=v_exp= km/s ▌Show O at z=v_exp= km/s ▌Show [O I] at z=v_exp= km/s ▌Show O II at z=v_exp= km/s ▌Show [O II] at z=v_exp= km/s ▌Show [O III] at z=v_exp= km/s ▌Show O V at z=v_exp= km/s ▌Show O VI at z=v_exp= km/s ▌Show Na at z=v_exp= km/s ▌Show Mg at z=v_exp= km/s ▌Show Mg II at z=v_exp= km/s ▌Show Si II at z=v_exp= km/s ▌Show S II at z=v_exp= km/s ▌Show Ca II at z=v_exp= km/s ▌Show [Ca II] at z=v_exp= km/s ▌Show Fe II at z=v_exp= km/s ▌Show Fe III at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Tellurics ▌Show Galaxy lines at z= ▌Show WR-WN at z=v_exp= km/s ▌Show WR-WC/O at z=v_exp= km/s z-step: v-step: Remarks

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

L-GOTO

GOTO-N_GOTO-2

2025-02-09 20:10:12 - 2025-06-09 04:19:02

2460716.340424 - 2460835.679879

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
494411	2025-06-09 04:19:02	2460835.679879	17.51	0.13		ABMag	L-GOTO	GOTO-N_GOTO-2	180
494410	2025-02-09 20:10:12	2460716.340424			17.9	ABMag	L-GOTO	GOTO-N_GOTO-2	360		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-05-16 11:53:07 - 2025-05-23 11:49:08

2460811.9952199 - 2460818.9924537

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
493690	2025-05-23 11:49:08	2460818.9924537	16.2113	0.0388582		ABMag	r-ZTF	P48_ZTF-Cam
493689	2025-05-20 11:41:43	2460815.9873032	18.0615	0.068472		ABMag	r-ZTF	P48_ZTF-Cam
493688	2025-05-16 11:53:07	2460811.9952199			18.2986	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

Clear-

Other_Other

2025-05-18 03:54:04 - 2025-05-26 03:24:30

2460813.66255 - 2460821.64201

5

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
491639	2025-05-26 03:24:30	2460821.64201	15.86	0.02	20	VegaMag	Clear-	Other_Other	400	Jingyuan Zhao	Follow-up observation for AT 2025kvc. Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program.
491640	2025-05-24 03:24:31	2460819.64203	16.13	0.03	20	VegaMag	Clear-	Other_Other	400	Jingyuan Zhao	Follow-up observation for AT 2025kvc. Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program.
491641	2025-05-22 03:38:33	2460817.65177	16.78	0.04	20	VegaMag	Clear-	Other_Other	400	Jingyuan Zhao	Follow-up observation for AT 2025kvc. Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program.
489250	2025-05-20 03:39:41	2460815.65256	18.09		19.5	VegaMag	Clear-	Other_Other	400	Jingyuan Zhao	Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope at Alnitak Remote Observatories in Nerpio, Spain, exposured 2×200s with Clear filter.
489249	2025-05-18 03:54:04	2460813.66255			18.5	VegaMag	Clear-	Other_Other	400	Jingyuan Zhao	[Last non detection] Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope at Alnitak Remote Observatories in Nerpio, Spain, exposured 2×200s with Clear filter.

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

258118

2025-06-10 09:26:48

GOTO_bot

A. Kumar, K. Ackley, M. Dyer et al.

GOTO

GOTO

00:42:22.962

+41:16:19.69

2025-06-09 04:19:01.632

17.51

L-GOTO

Other

GOTO25dkd

GOTO

N

257796

2025-06-05 08:18:12

Fritz

Nabeel Rehemtulla (CIERA, NU), Daniel Perley (LJMU), Christoffer Fremling (Caltech) et al.

ZTF

ZTF

00:42:22.999

+41:16:19.26

2025-05-20 11:41:42.996

18.0615

r-ZTF

PSN

ZTF25aaqwejm

ZTF

N

256805

2025-05-26 10:08:21

Jingyuan Zhao

Jingyuan Zhao

ROTS

00:42:23.010

+41:16:19.40

2025-05-26 03:24:29.664

15.86

Clear-

PNV

M31

Follow-up observation for AT 2025kvc. Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program.

N

255532

2025-05-20 13:28:27

Jingyuan Zhao

Ziyang Mai, Jingyuan Zhao, Jianlin Xu et al.

ROTS

00:42:23.000

+41:16:19.70

2025-05-20 03:39:41.184

18.09

Clear-

1

PNV

M31

Ziyang Mai, Jingyuan Zhao, Jianlin Xu, Mi Zhang report discovery of a possible nova in M31. Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope at Alnitak Remote Observatories in Nerpio, Spain, exposured 2×200s with Clear filter, around 2025 May 20.1526 UT, mag = 18.09 CV. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program.

2025TNSTR1850....1M

N

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025kvc_atrep_255532.png	Discoverey Image	2025-05-21 02:23:37	Jingyuan Zhao

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

21196

2025-05-31 01:53:09

Claudio Balcon

Claudio Balcon (Belluno A.O. ISSP)

None

Nova

0

1

The strong and broad H-alpha line suggest a Nova in M31

2025TNSCR2057....1B

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
21196	2025-05-31 01:20:00	BL41 / FOSC-E5535	1800	Claudio Balcon	Claudio Balcon	None	tns_2025kvc_2025-05-31_01-20-00_BL41_FOSC-E5535_None.dat	tns_2025kvc_2025-05-31_01-20-00_BL41_FOSC-E5535_None.fit	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 257796 of Group ZTF
Previous RA, DEC: 00:42:23.010, +41:16:19.40 (10.595875, +41.272056)
Updated RA, DEC: 00:42:22.999, +41:16:19.26 (10.595829, +41.2720161)

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Object coordinates updated

Object coordinates updated according to AT-report 256805 of Group None
Previous RA, DEC: 00:42:23.000, +41:16:19.70 (10.595833, +41.272139)
Updated RA, DEC: 00:42:23.010, +41:16:19.40 (10.595875, +41.272056)

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