2026hbh | Transient Name Server

RA/DEC (2000)

10:49:29.855 +21:46:41.84

162.37439380526 +21.778288457895

Type

SN Ia-91bg-like

Redshift

0.023812

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2026-03-23 06:05:32.000

TNS AT

Y

Public

Y

Discovery Mag

19.9897

Filter

r-ZTF

Reporter/s

Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF

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
	23423	2026-04-03 20:08:00	BL41 / FOSC-E5535	9000	Claudio Balcon	Claudio Balcon	None	tns_2026hbh_2026-04-03_20-08-00_BL41_FOSC-E5535_None.dat	tns_2026hbh_2026-04-03_20-08-00_BL41_FOSC-E5535_None.fit	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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2026-03-14 01:27:02 - 2026-03-14 01:27:02

2461113.56044 - 2461113.56044

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
570585	2026-03-14 01:27:02	2461113.56044			19.92	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

g-WFST

WFST_WFST-WFC

2026-04-05 19:23:31 - 2026-04-05 19:23:31

2461136.308 - 2461136.308

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
575833	2026-04-05 19:23:31	2461136.308	18.67	0.02		ABMag	g-WFST	WFST_WFST-WFC	30

Clear-

LAST_LAST-Cam

2024-03-03 21:45:03 - 2026-04-06 17:48:48

2460373.40628 - 2461137.24222

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
572924	2026-04-06 17:48:48	2461137.24222	18.56			ABMag	Clear-	LAST_LAST-Cam	360
572923	2024-03-03 21:45:03	2460373.40628			21.92	ABMag	Clear-	LAST_LAST-Cam	7840		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2026-03-16 22:28:30 - 2026-03-26 21:11:34

2461116.436459 - 2461126.38303

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
570465	2026-03-26 21:11:34	2461126.38303	18.64	0.09		ABMag	L-GOTO	GOTO-N_GOTO-2	180
570464	2026-03-16 22:28:30	2461116.436459			19.8	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2026-03-22 07:08:51 - 2026-03-23 06:05:32

2461121.7978125 - 2461122.7538426

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
569589	2026-03-23 06:05:32	2461122.7538426	19.9897	0.164351		ABMag	r-ZTF	P48_ZTF-Cam
571922	2026-03-23 06:05:32	2461122.7538426	19.9897	0.164351	20.5583	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
571921	2026-03-22 07:08:51	2461121.7978125			19.4642	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

g-ZTF

P48_ZTF-Cam

2026-03-22 08:10:41 - 2026-03-24 08:40:20

2461121.8407523 - 2461123.8613426

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
569590	2026-03-24 08:40:20	2461123.8613426	19.5849	0.168991		ABMag	g-ZTF	P48_ZTF-Cam
569588	2026-03-22 08:10:41	2461121.8407523			18.7657	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2026-03-27 07:27:22 - 2026-03-27 07:27:22

2461126.81067 - 2461126.81067

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
570586	2026-03-27 07:27:22	2461126.81067	18.678	0.197	18.82	ABMag	orange-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
300406	2026-04-16 13:07:43	WFST_SN	Zelin Xu, Dezheng Meng, Ji-an Jiang et al.	WFST	WFST	10:49:29.840	+21:46:41.82	2026-04-05 19:23:31.200	18.67	g-WFST		PSN		WFST260405aohzw	WFST				N
298927	2026-04-06 22:14:55	LAST_Bot1	R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS) et al.	LAST	LAST	10:49:29.813	+21:46:41.53	2026-04-06 17:48:47.808	18.56	Clear-		PSN			LAST				N
298318	2026-04-02 18:44:26	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	10:49:29.855	+21:46:41.84	2026-03-23 06:05:32.001	19.9897	r-ZTF		PSN		ZTF26aaotmuq	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF26aaotmuq		N
297575	2026-03-27 16:29:30	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	10:49:29.822	+21:46:41.94	2026-03-27 07:27:21.888	18.678	orange-ATLAS		PSN		ATLAS26dkz	ATLAS				N
297523	2026-03-27 09:44:37	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	10:49:29.836	+21:46:42.03	2026-03-26 21:11:33.792	18.64	L-GOTO		Other		GOTO26cmn	GOTO				N
297121	2026-03-24 09:19:29	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	10:49:29.841	+21:46:41.97	2026-03-23 06:05:32.000	19.9897	r-ZTF		PSN		ZTF26aaotmuq	ZTF			2026TNSTR1267....1S	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

23421

2026-04-03 22:28:39

Claudio Balcon

Claudio Balcon (Belluno A.O. ISSP)

None

SN Ia-91bg-like

0.023812

1

GELATO Harutyunyan et al., 2008, A&A, 488, 383 (gelato@tng.iac.es) suggests that this spectrum (although with low S/N) resembles that of a type Ia supernova at the host galaxy redshift. Several fits are with sub-luminous events. We tentatively classify this transient as a SN Ia-91bg-like.

2026TNSCR1412....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
23423	2026-04-03 20:08:00	BL41 / FOSC-E5535	9000	Claudio Balcon	Claudio Balcon	None	tns_2026hbh_2026-04-03_20-08-00_BL41_FOSC-E5535_None.dat	tns_2026hbh_2026-04-03_20-08-00_BL41_FOSC-E5535_None.fit	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 298318 of Group ZTF
Previous RA, DEC: 10:49:29.841, +21:46:41.97 (162.374337, +21.7783257)
Updated RA, DEC: 10:49:29.855, +21:46:41.84 (162.37439380526, +21.778288457895)

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