2023clx | Transient Name Server

RA/DEC (2000)

11:40:09.397 +15:19:38.54

175.0391524 +15.3273735

Type

TDE

Redshift

Discovery Report Classification Report

Related AstroNotes: 2023-51

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2023-02-22 05:02:24.000

TNS AT

Y

Public

Y

Host Name

NGC 3799

Host Redshift

0.01107

Comments

[Prefix updated to TDE by admin on 2025-01-26]

Discovery Mag

16.3

Filter

g-Sloan

Reporter/s

K. Z. Stanek, for the ASAS-SN team

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

P48_ZTF-Cam_r

▌

P48_ZTF-Cam_g

▌

ASASSN-2_Cassius_g

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
	14552	2023-02-26 13:56:55	Other / Other	3600	Kenta Taguchi	Kenta Taguchi	None	tns_2023clx_2023-02-26_13-56-55_Other_Other.dat	tns_2023clx_2023-02-26_13-56-55_Other_Other.fits	Object
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), ▌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

r-ZTF

P48_ZTF-Cam

2023-02-05 09:04:19 - 2023-02-05 09:04:19

2459980.878 - 2459980.878

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
332023	2023-02-05 09:04:19	2459980.878	19.28			ABMag	r-ZTF	P48_ZTF-Cam	30	ZTF

g-ZTF

P48_ZTF-Cam

2023-02-02 12:44:38 - 2023-03-17 05:22:34

2459978.031 - 2460020.724

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
332024	2023-03-17 05:22:34	2460020.724	17.23			ABMag	g-ZTF	P48_ZTF-Cam	30	ZTF
332022	2023-02-02 12:44:38	2459978.031			20.06	ABMag	g-ZTF	P48_ZTF-Cam	30	ZTF	[Last non detection]

g-Sloan

ASASSN-2_Cassius

2023-02-13 06:00:00 - 2023-02-22 05:02:24

2459988.75 - 2459997.71

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
330503	2023-02-22 05:02:24	2459997.71	16.3			ABMag	g-Sloan	ASASSN-2_Cassius
330502	2023-02-13 06:00:00	2459988.75			17.9	ABMag	g-Sloan	ASASSN-2_Cassius			[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
172302	2023-03-17 09:26:10	ZTF_Bot1	C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaboration et al.	ZTF	ZTF	11:40:09.397	+15:19:38.54	2023-02-05 09:04:19.200	19.28	r-ZTF		PSN		ZTF18aabkvpi	ZTF				N
171535	2023-02-23 04:06:56	Krzysztof Stanek	K. Z. Stanek,for the ASAS-SN team et al.	ASAS-SN	ASAS-SN	11:40:09.444	+15:19:39.04	2023-02-22 05:02:24.000	16.3	g-Sloan		PSN	NGC 3799	ASASSN-23bd	ASAS-SN		On the rise, nuclear source, so could also be a TDE	2023TNSTR.421....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

14478

2023-02-26 17:38:18

Kenta Taguchi

Kenta Taguchi (Kyoto University), Kohki Uno (Kyoto University), Takashi Nagao (University of Turku, Aalto University), Keiichi Maeda (Kyoto University)

None

TDE

1

Our spectrum is very blue and exhibits broad Balmer lines. The spectral features are very similar to a sample of previously-identified TDEs (e.g., AT 2018hyz = ASASSN-18zj). Assuming the distance of 50-100 Mpc to the host galaxy NGC 3799, the current absolute magnitude is about -17 or -18 mag. It is likely still rising for another one or two magnitudes. Follow-up observations are highly encouraged.

2023TNSCR.438....1T

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
14552	2023-02-26 13:56:55	Other / Other	3600	Kenta Taguchi	Kenta Taguchi	None	tns_2023clx_2023-02-26_13-56-55_Other_Other.dat	tns_2023clx_2023-02-26_13-56-55_Other_Other.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 172302 of Group ZTF
Previous RA, DEC: 11:40:09.444, +15:19:39.04 (175.03935, +15.32751)
Updated RA, DEC: 11:40:09.397, +15:19:38.54 (175.0391524, 15.3273735)

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