2025aahc | Transient Name Server

RA/DEC (2000)

23:03:20.558 -00:12:37.31

345.835659 -0.210363

Type

Afterglow

Redshift

0.572

Discovery Report Classification Report

Reporting Group

LAST

Discovering Data Source

LAST

Discovery Date

2025-10-13 18:10:26.400

TNS AT

Y

Public

Y

Discovery Mag

16.14

Filter

Clear-

Reporter/s

E. O. Ofek (WIS), R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS), S. Garrappa (WIS), S. Ben-Ami (WIS), D. Polishook (WIS), O. Yaron (WIS), P. Chen (WIS), A. Krassilchtchikov (WIS), Y. M. Shani (WIS), E. Segre (WIS), A. Gal-Yam (WIS), S. Spitzer (WIS), and K. Rybicki (WIS) on behalf of the LAST Collaboration

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

LAST_LAST-Cam_Clear

▌

GOTO-N_GOTO-2_L

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
	22207	2025-10-13 20:03:00	BL41 / FOSC-E5535	3600	Balcon	Balcon	None	tns_2025aahc_2025-10-13_20-03-00_BL41_FOSC-E5535_None.dat	tns_2025aahc_2025-10-13_20-03-00_BL41_FOSC-E5535_None.fit	Object			Spectrum taken in a large collaboration with: GRB/UAI - Gamma ray Burst section of Unione Astrofili Italiani. M.G. Dainotti (National Astronomical Observatory of Japan), Y. Niino (Tokyo University, Institute of Astronomy), K. Kalinowski (Aarhus University, Department of Physics and Astronomy)
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 Spectrum taken in a large collaboration with: GRB/UAI - Gamma ray Burst section of Unione Astrofili Italiani. M.G. Dainotti (National Astronomical Observatory of Japan), Y. Niino (Tokyo University, Institute of Astronomy), K. Kalinowski (Aarhus University, Department of Physics and Astronomy)

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

Clear-

LAST_LAST-Cam

2025-09-22 18:14:10 - 2025-10-13 18:10:26

2460941.25984 - 2460962.25725

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
523595	2025-10-13 18:10:26	2460962.25725	16.14			ABMag	Clear-	LAST_LAST-Cam	400
523594	2025-09-22 18:14:10	2460941.25984			20.52	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-10-08 23:09:08 - 2025-10-13 21:40:06

2460957.46468 - 2460962.402854

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524130	2025-10-13 21:40:06	2460962.402854	17.12	0.02		ABMag	L-GOTO	GOTO-N_GOTO-2	180
524129	2025-10-08 23:09:08	2460957.46468			18.9	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

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
273500	2025-10-15 17:50:25	GOTO_bot	B. Gompertz, D. O'Neill, K. Ackley et al.	GOTO	GOTO	23:03:20.558	-00:12:37.31	2025-10-13 21:40:06.240	17.12	L-GOTO		Other		GOTO25inc	GOTO				N
273201	2025-10-13 18:44:25	LAST_Bot1	E. O. Ofek (WIS), R. Konno (WIS), E. A. Zimmerman (WIS) et al.	LAST	LAST	23:03:20.589	-00:12:36.76	2025-10-13 18:10:26.400	16.14	Clear-		PSN			LAST			2025TNSTR4100....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

22207

2025-10-14 14:55:47

Claudio Balcon

Claudio Balcon (Belluno A.O. ISSP)

None

Afterglow

0.572

1

The low-resolution spectrum shows a featureless, noise-dominated continuum. Redshift from Martin-Carrillo GCN Circular 42227. This transient is the afterglow of GRB251013C

2025TNSCR4119....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
22207	2025-10-13 20:03:00	BL41 / FOSC-E5535	3600	Balcon	Balcon	None	tns_2025aahc_2025-10-13_20-03-00_BL41_FOSC-E5535_None.dat	tns_2025aahc_2025-10-13_20-03-00_BL41_FOSC-E5535_None.fit	Object			Spectrum taken in a large collaboration with: GRB/UAI - Gamma ray Burst section of Unione Astrofili Italiani. M.G. Dainotti (National Astronomical Observatory of Japan), Y. Niino (Tokyo University, Institute of Astronomy), K. Kalinowski (Aarhus University, Department of Physics and Astronomy)

Comments

Object coordinates updated

Object coordinates updated according to AT-report 273500 of Group GOTO
Previous RA, DEC: 23:03:20.589, -00:12:36.76 (345.83578890603, -0.21021234799664)
Updated RA, DEC: 23:03:20.558, -00:12:37.31 (345.835659, -0.210363)

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