2025ctp | Transient Name Server

RA/DEC (2000)

07:12:14.632 +07:13:54.38

108.060968 +7.2317714625

Type

SN IIb

Redshift

0.028343

Discovery Report Classification Report

Related AstroNotes: 2025-79

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-02-22 04:38:47.999

TNS AT

Y

Public

Y

Discovery Mag

20.0408

Filter

r-ZTF

Reporter/s

Eyouel Zewdie Abate (UC Berkeley), 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

▌

ATLAS-CHL_ATLAS-04_orange

▌

P48_ZTF-Cam_r

▌

P48_ZTF-Cam_g

▌

ATLAS-HKO_ATLAS-02_orange

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
	20537	2025-03-07 03:00:22	VLT-UT1 / FORS2	900	service	G. Csoernyei	adH0cc	tns_2025ctp_2025-03-07_03-00-22_VLT-UT1_FORS2_adH0cc.asci	tns_2025ctp_2025-03-07_03-00-22_VLT-UT1_FORS2_adH0cc.fits	Object			Quick-reduction spectrum
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 Quick-reduction spectrum

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-02-25 03:09:49 - 2025-02-25 03:09:49

2460731.63182 - 2460731.63182

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
472068	2025-02-25 03:09:49	2460731.63182			19.14	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot	[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-02-20 06:50:01 - 2025-02-22 04:38:48

2460726.7847338 - 2460728.6936111

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
471994	2025-02-22 04:38:48	2460728.6936111	20.0408	0.221122		ABMag	r-ZTF	P48_ZTF-Cam
474386	2025-02-22 04:38:48	2460728.6936111	20.0408	0.221122	20.0277	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
471993	2025-02-20 06:50:01	2460726.7847338			20.3243	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]
474385	2025-02-20 06:50:01	2460726.7847338			20.3243	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

g-ZTF

P48_ZTF-Cam

2025-02-26 04:36:01 - 2025-02-26 04:36:01

2460732.6916782 - 2460732.6916782

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
471995	2025-02-26 04:36:01	2460732.6916782	19.5123	0.117484		ABMag	g-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-02-26 08:03:51 - 2025-02-26 08:03:51

2460732.83601 - 2460732.83601

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
472069	2025-02-26 08:03:51	2460732.83601	18.986	0.138	19.44	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	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	Bibcode	Unreal	Auto classification
247299	2025-03-09 19:23:56	Fink	Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al.	Fink	ZTF	07:12:14.632	+07:13:54.38	2025-02-22 04:38:47.999	20.0408	r-ZTF		PSN		ZTF25aagzocg	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25aagzocg		N
246052	2025-02-26 14:53:33	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	07:12:14.624	+07:13:54.44	2025-02-26 08:03:51.264	18.986	orange-ATLAS		PSN		ATLAS25ccc	ATLAS				N
246023	2025-02-26 05:31:03	Fritz	Eyouel Zewdie Abate (UC Berkeley),Jesper Sollerman (SU),Christoffer Fremling (Caltech) et al.	ZTF	ZTF	07:12:14.633	+07:13:54.42	2025-02-22 04:38:47.999	20.0408	r-ZTF		PSN		ZTF25aagzocg	ZTF			2025TNSTR.797....1A	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

20537

2025-03-07 11:15:44

Geza Csornyei

G. Csoernyei, B. Leibundgut, J. Spyromilio (ESO), S. Taubenberger (TUM / MPA), W. Hillebrandt (MPA), S. Blondin (CNRS, LAM / ESO)

adH0cc

SN IIb

0.028343

1

1

adH0cc

The spectrum shows broad P Cygni features of He along with the Ca triplet, charachteristic of young Type IIb supernovae. GELATO (Harutyunyan et al. 2008, 2008A&A...488..383H) found good matches with the spectrum of SN 1993J 2 days after maximum light. We adopted the redshift of the host galaxy.

2025TNSCR.913....1C

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025ctp_atrep_20537_adH0cc.png	Comparison plot made by GELATO	2025-03-07 11:15:44	Geza Csornyei

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
20537	2025-03-07 03:00:22	VLT-UT1 / FORS2	900	service	G. Csoernyei	adH0cc	tns_2025ctp_2025-03-07_03-00-22_VLT-UT1_FORS2_adH0cc.asci	tns_2025ctp_2025-03-07_03-00-22_VLT-UT1_FORS2_adH0cc.fits	Object			Quick-reduction spectrum

Comments

Object coordinates updated

Object coordinates updated according to AT-report 247299 of Group ZTF
Previous RA, DEC: 07:12:14.633, +07:13:54.42 (108.0609709, +7.2317824)
Updated RA, DEC: 07:12:14.632, +07:13:54.38 (108.060968, 7.2317714625)

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