2023ung | Transient Name Server

RA/DEC (2000)

21:54:21.720 +09:06:11.98

328.5904988 +9.1033287

Type

SN Ia

Redshift

0.037798

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2023-10-04 03:36:00.000

TNS AT

Y

Public

Y

Host Name

WISEA J215421.70+090611.9

Host Redshift

0.037798

Discovery Mag

17.2

Filter

g-Sloan

Reporter/s

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

P48_ZTF-Cam_g

▌

ASASSN-4_Leavitt_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
	15839	2023-10-10 20:32:00	BL41 / FOSC-E5535	3600	Claudio Balcon	Claudio Balcon	None	tns_2023ung_2023-10-10_20-32-00_Other_Other.dat	tns_2023ung_2023-10-10_20-32-00_Other_Other.fit	Object			We obtained the low-resolution spectrum using the FOSC-ES32 spectrograph attached to a 0.41m telescope, in the course of Italian Supernovae Search Project.
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 We obtained the low-resolution spectrum using the FOSC-ES32 spectrograph attached to a 0.41m telescope, in the course of Italian Supernovae Search Project.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

g-ZTF

P48_ZTF-Cam

2019-08-04 10:14:53 - 2023-10-21 08:13:55

2458699.927 - 2460238.843

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
370540	2023-10-21 08:13:55	2460238.843	18.23			ABMag	g-ZTF	P48_ZTF-Cam	30	ZTF
370539	2019-08-04 10:14:53	2458699.927	19.39			ABMag	g-ZTF	P48_ZTF-Cam	30	ZTF

g-Sloan

ASASSN-4_Leavitt

2023-09-19 05:31:12 - 2023-09-19 05:31:12

2460206.73 - 2460206.73

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
367376	2023-09-19 05:31:12	2460206.73			18.4	ABMag	g-Sloan	ASASSN-4_Leavitt			[Last non detection]

g-Sloan

ASASSN-2_Cassius

2023-10-04 03:36:00 - 2023-10-04 03:36:00

2460221.65 - 2460221.65

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
367377	2023-10-04 03:36:00	2460221.65	17.2			ABMag	g-Sloan	ASASSN-2_Cassius

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
191728	2023-10-24 21:04:05	ZTF_Bot1	C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaboration	ZTF	ZTF	21:54:21.720	+09:06:11.98	2019-08-04 10:14:52.800	19.39	g-ZTF		PSN		ZTF19abnggdt	ZTF				N
190164	2023-10-10 01:02:00	Krzysztof Stanek	K. Z. Stanek, S. Petz, for the ASAS-SN team	ASAS-SN	ASAS-SN	21:54:21.826	+09:06:13.18	2023-10-04 03:36:00.000	17.2	g-Sloan		PSN	WISEA J215421.70+090611.9	ASASSN-23gx	ASAS-SN		Present in several epochs	2023TNSTR2540....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

15754

2023-10-10 21:40:48

Claudio Balcon

Claudio Balcon (Belluno A.O. ISSP)

None

SN Ia

0.037798

1

The low S/N spectrum is contaminated by the host galaxy. DASH (Muthukrishna et al., 2019, ApJ, 885, 85) suggests that this spectrum resembles that of a type la supernova near maximum light at the redshift of the host galaxy, value from NED.

2023TNSCR2549....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
15839	2023-10-10 20:32:00	BL41 / FOSC-E5535	3600	Claudio Balcon	Claudio Balcon	None	tns_2023ung_2023-10-10_20-32-00_Other_Other.dat	tns_2023ung_2023-10-10_20-32-00_Other_Other.fit	Object			We obtained the low-resolution spectrum using the FOSC-ES32 spectrograph attached to a 0.41m telescope, in the course of Italian Supernovae Search Project.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 191728 of Group ZTF
Previous RA, DEC: 21:54:21.826, +09:06:13.18 (328.59094, +9.10366)
Updated RA, DEC: 21:54:21.720, +09:06:11.98 (328.5904988, 9.1033287)

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