2025aarn | Transient Name Server

RA/DEC (2000)

04:37:19.578 -08:46:35.93

69.3315733 -8.7766468

Type

SN II

Redshift

0.01685

Discovery Report Classification Report

Related AstroNotes: 2025-302, 2025-303, DRAFT-2349, 2025-332

Reporting Group

GOTO

Discovering Data Source

GOTO

Discovery Date

2025-10-17 17:49:43.968

TNS AT

Y

Public

Y

Discovery Mag

16.98

Filter

L-GOTO

Reporter/s

D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

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
	22483	2025-11-23 00:00:00	FLWO-1.5m / FAST	1500	Gilbert Esquerdo, Perry Berlind	S. Karthik Yadavalli, Harsh Kumar	VHU-TDA	tns_2025aarn_2025-11-23_FLWO-1.5m_FAST_VHU-TDA.ascii		Object
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), 0 (observed) ▌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 Remarks
	22255	2025-10-21 03:02:07	NOT / ALFOSC		E. Kankare, S. Mattila, P. Vaisanen		None	tns_2025aarn_2025-10-21_03-02-06.885_NOT_ALFOSC_None.dat		Object
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), 0 (observed) ▌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 Remarks

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

Clear-

LAST_LAST-Cam

2025-11-12 21:23:53 - 2025-11-27 21:38:21

2460992.39159 - 2461007.40163

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
534341	2025-11-27 21:38:21	2461007.40163	17.9			ABMag	Clear-	LAST_LAST-Cam	400
534340	2025-11-12 21:23:53	2460992.39159			19.23	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-S_GOTO-3

2025-10-15 17:55:36 - 2025-10-17 17:49:44

2460964.246955 - 2460966.242867

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524441	2025-10-17 17:49:44	2460966.242867	16.98	0.05		ABMag	L-GOTO	GOTO-S_GOTO-3	180
524440	2025-10-15 17:55:36	2460964.246955			19.9	ABMag	L-GOTO	GOTO-S_GOTO-3	180		[Last non detection]

cyan-ATLAS

ATLAS-STH_ATLAS-03

2025-10-15 23:15:48 - 2025-10-15 23:15:48

2460964.46931 - 2460964.46931

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525223	2025-10-15 23:15:48	2460964.46931			19.74	ABMag	cyan-ATLAS	ATLAS-STH_ATLAS-03	30	Robot	[Last non detection]

BG-q-BlackGem

BG2_BlackGEM-Cam2

2025-09-30 07:56:06 - 2025-10-21 06:58:36

2460948.830625 - 2460969.7906944

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525961	2025-10-21 06:58:36	2460969.7906944	16.6	0.03	20.71	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic
525960	2025-09-30 07:56:06	2460948.830625			20.81	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic	[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-10-18 09:32:26 - 2025-10-18 09:32:26

2460966.8975231 - 2460966.8975231

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524584	2025-10-18 09:32:26	2460966.8975231	16.9894	0.0319253		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-10-16 11:28:29 - 2025-10-17 10:01:35

2460964.9781134 - 2460965.9177662

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524583	2025-10-17 10:01:35	2460965.9177662	17.2258	0.037284		ABMag	g-ZTF	P48_ZTF-Cam
524582	2025-10-16 11:28:29	2460964.9781134			20.142	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

cyan-ATLAS

ATLAS-MLO_ATLAS-01

2025-10-20 12:22:58 - 2025-10-20 12:22:58

2460969.01595 - 2460969.01595

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525224	2025-10-20 12:22:58	2460969.01595	16.527	0.018	19.41	ABMag	cyan-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

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
278517	2025-11-28 05:17:14	LAST_Bot1	E. O. Ofek (WIS),R. Konno (WIS),E. A. Zimmerman (WIS) et al.	LAST	LAST	04:37:19.609	-08:46:36.35	2025-11-27 21:38:20.832	17.9	Clear-		PSN			LAST				N
274383	2025-10-23 10:04:05	BlackGEM_Bot1	H. Tranin,F. Stoppa,D. Pieterse et al.	BlackGEM	BlackGEM	04:37:19.585	-08:46:36.28	2025-10-21 06:58:36.000	16.6	BG-q-BlackGem		PSN		BGEM J043719.59-084636.3	BlackGEM				N
274074	2025-10-20 14:33:33	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	04:37:19.573	-08:46:35.73	2025-10-20 12:22:58.080	16.527	cyan-ATLAS		PSN		ATLAS25mzq	ATLAS				N
273773	2025-10-18 09:44:32	BTSbot_bot	Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al.	ZTF	ZTF	04:37:19.578	-08:46:35.93	2025-10-17 10:01:34.999	17.2258	g-ZTF		PSN		ZTF25abxjgzg	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).		N
273710	2025-10-17 18:50:50	GOTO_bot	D. O'Neill,K. Ackley,M. Dyer et al.	GOTO	GOTO	04:37:19.566	-08:46:36.02	2025-10-17 17:49:43.968	16.98	L-GOTO		Other		GOTO25iqc	GOTO			2025TNSTR4156....1O	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

22482

2025-12-02 01:18:29

VHU-TDA

Yize Dong, Anya Nugent, V. Ashley Villar, S. Karthik Yadavalli, Alex Gagliano, Kaylee de Soto, Danielle Frostig, Harsh Kumar, Peter Blanchard

VHU-TDA

SN II

0.01685

1

1

VHU-TDA

redshift measured from the template match

2025TNSCR4810....1D

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025aarn_atrep_22482_VHU-TDA.png		2025-12-02 01:18:31	VHU-TDA

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
22483	2025-11-23 00:00:00	FLWO-1.5m / FAST	1500	Gilbert Esquerdo, Perry Berlind	S. Karthik Yadavalli, Harsh Kumar	VHU-TDA	tns_2025aarn_2025-11-23_FLWO-1.5m_FAST_VHU-TDA.ascii		Object

22255

2025-10-21 09:23:15

Miika Pursiainen

M. Pursiainen, T. Killestein (Warwick), D. O'Neill (Birmingham), P. Charalampopoulos (Turku)

None

SN II

0.0157

1

Spectrum exhibits blue continuum with broad, albeit shallow Balmer P-Cygni lines at the redshift of the host galaxy (0.0157, DESI, DR1), and we classify it as young Type II SN.

2025TNSCR4232....1P

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
22255	2025-10-21 03:02:07	NOT / ALFOSC		E. Kankare, S. Mattila, P. Vaisanen		None	tns_2025aarn_2025-10-21_03-02-06.885_NOT_ALFOSC_None.dat		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 273773 of Group ZTF
Previous RA, DEC: 04:37:19.566, -08:46:36.02 (69.331526, -8.776672)
Updated RA, DEC: 04:37:19.578, -08:46:35.93 (69.3315733, -8.7766468)

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