2025afad | Transient Name Server

RA/DEC (2000)

08:57:10.727 -15:33:35.19

134.294693838 -15.5597751142

Type

SLSN-I

Redshift

0.307

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2025-11-26 12:31:27.840

TNS AT

Public

Discovery Mag

19.12

Filter

cyan-ATLAS

Reporter/s

J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill, P. J. Broda, A. J. Smith (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)

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	Observer/s	Reducer/s	Group	Spectrum ascii file	Spec. Type
	22646	2025-12-17 03:04:54	NOT / ALFOSC	Jesper Sollerman, Avinash Singh	Avinash Singh	ZTF	tns_2025afad_2025-12-17_03-04-54.474000_NOT_ALFOSC_ZTF.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
	22578	2025-12-09 04:20:30	LT / SPRAT	Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025afad_2025-12-09_04-20-30.079_LT_SPRAT_ZTF.spec	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

L-GOTO

GOTO-S_GOTO-4

2025-12-03 14:36:14 - 2025-12-03 14:36:14

2461013.108498 - 2461013.108498

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
536986	2025-12-03 14:36:14	2461013.108498	19.21	0.2		ABMag	L-GOTO	GOTO-S_GOTO-4	180

L-GOTO

GOTO-S_GOTO-3

2025-11-18 16:04:15 - 2025-11-18 16:04:15

2460998.169621 - 2460998.169621

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
536985	2025-11-18 16:04:15	2460998.169621			19.5	ABMag	L-GOTO	GOTO-S_GOTO-3	180		[Last non detection]

orange-ATLAS

ATLAS-STH_ATLAS-03

2025-11-25 00:36:52 - 2025-11-25 00:36:52

2461004.5256 - 2461004.5256

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
534264	2025-11-25 00:36:52	2461004.5256			19.35	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot	[Last non detection]

BG-q-BlackGem

BG3_BlackGEM-Cam3

2025-11-16 06:39:22 - 2025-11-16 06:39:22

2460995.777338 - 2460995.777338

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
587418	2025-11-16 06:39:22	2460995.777338	20.4	0.17	20.53	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic

BG-q-BlackGem

BG2_BlackGEM-Cam2

2025-11-15 06:34:49 - 2025-11-15 06:34:49

2460994.7741782 - 2460994.7741782

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
587417	2025-11-15 06:34:49	2460994.7741782			19.92	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic	[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-11-01 11:03:28 - 2025-11-28 09:49:35

2460980.9607407 - 2461007.9094329

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Remarks
534399	2025-11-28 09:49:35	2461007.9094329	19.1876	0.13089		ABMag	g-ZTF	P48_ZTF-Cam
534398	2025-11-02 11:11:30	2460981.9663194	21.0922	0.19782		ABMag	g-ZTF	P48_ZTF-Cam
534397	2025-11-01 11:03:28	2460980.9607407			20.0061	ABMag	g-ZTF	P48_ZTF-Cam	[Last non detection]

cyan-ATLAS

ATLAS-HKO_ATLAS-02

2025-11-26 12:31:28 - 2025-11-26 12:31:28

2461006.02185 - 2461006.02185

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
534265	2025-11-26 12:31:28	2461006.02185	19.12	0.132	19.41	ABMag	cyan-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot

i-P1

PS1_GPC1

2025-11-16 12:55:36 - 2025-11-16 12:55:36

2460996.03861 - 2460996.03861

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553053	2025-11-16 12:55:36	2460996.03861	20.25	0.16	20.7	ABMag	i-P1	PS1_GPC1	45	Robot

AT Reports

ID	Time received (UT)	Sender	Reporter/s	Reporting group	Disc. Data Source	RA	DEC	Discovery date (UT)	Discovery Mag.	Filter	AT Type	Internal name	Assoc. Groups	ADS Bibcode	Unreal
306273	2026-05-27 17:31:30	BlackGEM_Bot1	H. Tranin, F. Stoppa, D. Pieterse et al.	BlackGEM	BlackGEM	08:57:10.717	-15:33:35.21	2025-11-16 06:39:22.000	20.4	BG-q-BlackGem	PSN	BGEM J085710.72-153335.2	BlackGEM		N
288532	2026-01-23 11:48:43	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	08:57:10.727	-15:33:35.19	2025-11-16 12:55:35.904	20.25	i-P1	PSN	PS25mts	Pan-STARRS		N
279767	2025-12-09 08:12:53	GOTO_bot	G. Ramsay, K. Ackley, M. Dyer et al.	GOTO	GOTO	08:57:10.764	-15:33:34.91	2025-12-03 14:36:14.400	19.21	L-GOTO	Other	GOTO25lha	GOTO		N
278538	2025-11-28 10:36:41	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	08:57:10.716	-15:33:35.04	2025-11-02 11:11:29.996	21.0922	g-ZTF	PSN	ZTF25accmopr	ZTF		N
278466	2025-11-27 16:23:31	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	08:57:10.673	-15:33:34.74	2025-11-26 12:31:27.840	19.12	cyan-ATLAS	PSN	ATLAS25pal	ATLAS	2025TNSTR4732....1T	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

22645

2025-12-19 21:54:30

ZTF_Bot1

R. Chornock, J. Castaneda Jaimes, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF)

ZTF

SLSN-I

0.307

ZTF

2025TNSCR5079....1C

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
22646	2025-12-17 03:04:54	NOT / ALFOSC		Jesper Sollerman, Avinash Singh	Avinash Singh	ZTF	tns_2025afad_2025-12-17_03-04-54.474000_NOT_ALFOSC_ZTF.ascii		Object

22577

2025-12-13 22:04:42

Jacob Wise

Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (Caltech), Zoe McGrath (LJMU), Lin Yan (Caltech), Ryan Chornock (Berkeley), Jesper Sollerman (OKC)

ZTF

SLSN-I

0.307

ZTF

Spectrum is well-fit to template spectra from previously classified SLSN-I events at a redshift of z = 0.307 ± 0.011. Classification performed using Next Generation Superfit (NGSF; AstroNote 2022-191, Howell et al. 2005).

2025TNSCR4962....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025afad_atrep_22577_ZTF.pdf	NGSF fits	2025-12-13 22:04:42	Jacob Wise

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
22578	2025-12-09 04:20:30	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025afad_2025-12-09_04-20-30.079_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 288532 of Group Pan-STARRS
Previous RA, DEC: 08:57:10.716, -15:33:35.04 (134.2946517, -15.5597329)
Updated RA, DEC: 08:57:10.727, -15:33:35.19 (134.294693838, -15.5597751142)

Object coordinates updated

Object coordinates updated according to AT-report 278538 of Group ZTF
Previous RA, DEC: 08:57:10.673, -15:33:34.74 (134.29447, -15.55965)
Updated RA, DEC: 08:57:10.716, -15:33:35.04 (134.2946517, -15.5597329)

SN 2025afad

Spectra

Light curves

Comments

Object coordinates updated

Object coordinates updated