2025bpq | Transient Name Server

RA/DEC (2000)

15:38:31.259 +40:04:36.08

234.630245514 +40.0766879268

Type

SN IIn

Redshift

0.0637

Discovery Report Classification Report

Related AstroNotes: 2025-70

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-02-15 11:58:56.003

TNS AT

Y

Public

Y

Discovery Mag

18.1693

Filter

r-ZTF

Reporter/s

Nabeel Rehemtulla (CIERA, NU), 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
	20468	2025-02-24 00:00:00	NOT / ALFOSC	2400	Jesper Sollerman, Steve Schulze, Avinash Singh (OKC,SU)	Anjasha Gangopadhyay	ZTF	tns_2025bpq_2025-02-24_NOT_ALFOSC_ZTF.ascii		Object		2025-02-25	The redshift is calculated from the host galaxy lines.
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 The redshift is calculated from the host galaxy lines.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

Clear-

LAST_LAST-Cam

2024-03-06 02:18:21 - 2025-02-28 01:12:55

2460375.59608 - 2460734.55064

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
472386	2025-02-28 01:12:55	2460734.55064	17.5			ABMag	Clear-	LAST_LAST-Cam	380
472385	2024-03-06 02:18:21	2460375.59608			20.89	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-02-13 03:23:43 - 2025-02-16 03:02:46

2460719.641473 - 2460722.626917

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
469330	2025-02-16 03:02:46	2460722.626917	17.72	0.11		ABMag	L-GOTO	GOTO-N_GOTO-2	180
469329	2025-02-13 03:23:43	2460719.641473			18	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-02-15 11:58:56 - 2025-02-15 11:58:56

2460721.9992593 - 2460721.9992593

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
468743	2025-02-15 11:58:56	2460721.9992593	18.1693	0.0745162		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-02-09 13:17:02 - 2025-02-15 12:48:30

2460716.0534954 - 2460722.0336806

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
468744	2025-02-15 12:48:30	2460722.0336806	18.0656	0.0657898		ABMag	g-ZTF	P48_ZTF-Cam
468742	2025-02-09 13:17:02	2460716.0534954			18.7468	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-02-13 14:11:44 - 2025-02-13 14:11:44

2460720.09148 - 2460720.09148

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
469343	2025-02-13 14:11:44	2460720.09148			18.88	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot	[Last non detection]

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-02-17 13:41:09 - 2025-02-17 13:41:09

2460724.07024 - 2460724.07024

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
469344	2025-02-17 13:41:09	2460724.07024	17.415	0.063	19.17	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot

i-P1

PS1_GPC1

2025-02-16 14:55:06 - 2025-02-16 14:55:06

2460723.1216 - 2460723.1216

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
477886	2025-02-16 14:55:06	2460723.1216	17.76	0.05	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	Related files	AT Type	Host name	Internal name	Assoc. Groups	End prop. period	Remarks	ADS Bibcode	Unreal	Auto classification
249378	2025-03-23 01:12:01	PS1_Bot1	K. C. Chambers,T. de Boer,J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	15:38:31.259	+40:04:36.08	2025-02-16 14:55:06.240	17.76	i-P1		PSN		PS25aox	Pan-STARRS				N
246193	2025-02-28 01:44:30	LAST_Bot1	R. Konno (WIS),E. Zimmerman (WIS),A. Horowicz (WIS) et al.	LAST	LAST	15:38:31.270	+40:04:35.59	2025-02-28 01:12:55.296	17.5	Clear-		PSN			LAST				N
244848	2025-02-17 15:10:36	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	15:38:31.255	+40:04:36.31	2025-02-17 13:41:08.736	17.415	orange-ATLAS		PSN		ATLAS25bqx	ATLAS				N
244841	2025-02-17 14:49:41	GOTO_bot	S. Belkin,D. O'Neill,K. Ackley et al.	GOTO	GOTO	15:38:31.271	+40:04:37.04	2025-02-16 03:02:45.888	17.72	L-GOTO		Other		GOTO25aje	GOTO				N
244449	2025-02-15 12:58:03	Fritz	Nabeel Rehemtulla (CIERA,NU),Christoffer Fremling (Caltech) et al.	ZTF	ZTF	15:38:31.261	+40:04:36.05	2025-02-15 11:58:56.003	18.1693	r-ZTF		PSN		ZTF25aafofmu	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).	2025TNSTR.616....1R	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

20468

2025-02-25 17:27:44

Anjasha Gangopadhyay

Anjasha Gangopadhyay, Jesper Sollerman, Ariel Goobar, Avinash Singh (OKC,SU), Steve Schulze (NorthWestern), Yuhan Yao (UC Berkeley)

ZTF

SN IIn

0.0637

1

ZTF

2025-02-25

We classify SN2025bpq as a type IIn SN based on the spectrum taken with NOT on 2025-02-24 (gr4, 40 mins). The SN shows flash ionized signatures of C III/N III around 4700 Angstrom along with intermediate width H$\alpha$ and H$\beta$ emission signatures (FWHM ~ 1300 km/sec). The redshift estimated from the host galaxy lines of ZTF25aafofmu is 0.0637. NGSF (AstroNote 2022-191; Howell et al. 2005) also shows a best match with SN IIn/II-flash. The line width is narrower than typical TDEs and rise time is also quite fast at the given absolute magnitude which rules out the TDE scenario.

2025TNSCR.804....1G

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
20468	2025-02-24 00:00:00	NOT / ALFOSC	2400	Jesper Sollerman, Steve Schulze, Avinash Singh (OKC,SU)	Anjasha Gangopadhyay	ZTF	tns_2025bpq_2025-02-24_NOT_ALFOSC_ZTF.ascii		Object		2025-02-25	The redshift is calculated from the host galaxy lines.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 249378 of Group Pan-STARRS
Previous RA, DEC: 15:38:31.261, +40:04:36.05 (234.630255, +40.0766813)
Updated RA, DEC: 15:38:31.259, +40:04:36.08 (234.630245514, 40.0766879268)

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