2023uta | Transient Name Server

RA/DEC (2000)

07:09:38.285 +54:56:59.75

107.409521039 +54.9499292327

Type

SN Ia

Redshift

0.036812

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2023-10-12 08:38:24.000

TNS AT

Public

Host Name

WISEA J070938.25+545701.2

Host Redshift

0.036812

Discovery Mag

16.8

Filter

g-Sloan

Reporter/s

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

PS2_GPC2_w

▌

ASASSN-4_Leavitt_g

▌

ATLAS-HKO_ATLAS-02_orange

▌

ASASSN-1_Brutus_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	Remarks
	15910	2023-10-17 15:09:35	Other / Other	1800	Eleni Koutsiona, Kenta Taguchi, Miho Kawabata	Kenta Taguchi	None	tns_2023uta_2023-10-17_15-09-35_Other_Other.dat	tns_2023uta_2023-10-17_15-09-35_Other_Other.fits	Object	We performed a spectroscopic follow-up observation with KOOLS-IFU mounted on the 3.8-m Seimei telescope at Okayama Observatory of Kyoto University. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8500 A.
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 performed a spectroscopic follow-up observation with KOOLS-IFU mounted on the 3.8-m Seimei telescope at Okayama Observatory of Kyoto University. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8500 A.
	15848	2023-10-12 19:58:25	Other / Other	1800	Kohki Uno, Masaki Tsurumi	Kenta Taguchi	None	tns_2023uta_2023-10-12_19-58-25_Other_Other.dat	tns_2023uta_2023-10-12_19-58-25_Other_Other.fits	Object	We performed a spectroscopic follow-up observation with KOOLS-IFU mounted on the 3.8-m Seimei telescope at Okayama Observatory of Kyoto University. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8500 A.
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 performed a spectroscopic follow-up observation with KOOLS-IFU mounted on the 3.8-m Seimei telescope at Okayama Observatory of Kyoto University. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8500 A.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

w-P1

PS2_GPC2

2023-11-08 14:05:59 - 2023-11-08 14:05:59

2460257.08749 - 2460257.08749

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
376080	2023-11-08 14:05:59	2460257.08749	17.93	0.02	22	ABMag	w-P1	PS2_GPC2	45	Robot

g-Sloan

ASASSN-4_Leavitt

2023-10-12 08:38:24 - 2023-10-12 08:38:24

2460229.86 - 2460229.86

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
367695	2023-10-12 08:38:24	2460229.86	16.8			ABMag	g-Sloan	ASASSN-4_Leavitt

orange-ATLAS

ATLAS-HKO_ATLAS-02

2023-10-03 15:29:06 - 2023-10-07 12:21:28

2460221.14521 - 2460225.01491

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
367774	2023-10-07 12:21:28	2460225.01491	18.068	0.124	18.79	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot
367773	2023-10-03 15:29:06	2460221.14521			18.14	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

g-Sloan

ASASSN-1_Brutus

2023-10-04 12:14:24 - 2023-10-04 12:14:24

2460222.01 - 2460222.01

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
367694	2023-10-04 12:14:24	2460222.01			17.5	ABMag	g-Sloan	ASASSN-1_Brutus			[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	AT Type	Host name	Internal name	Assoc. Groups	Remarks	ADS Bibcode	Unreal
194412	2023-11-23 20:57:52	PS1_Bot1	K. C. Chambers, T. de Boer, J. Herman et al.	Pan-STARRS	Pan-STARRS	07:09:38.285	+54:56:59.75	2023-11-08 14:05:59.136	17.93	w-P1	PSN		PS23kuo	Pan-STARRS			N
190407	2023-10-13 09:15:03	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	07:09:38.326	+54:56:59.14	2023-10-07 12:21:28.224	18.068	orange-ATLAS	PSN		ATLAS23ttz	ATLAS			N
190371	2023-10-12 13:21:37	Krzysztof Stanek	K. Z. Stanek, A. Miller, for the ASAS-SN team	ASAS-SN	ASAS-SN	07:09:38.230	+54:57:00.07	2023-10-12 08:38:24.000	16.8	g-Sloan	PNV	WISEA J070938.25+545701.2	ASASSN-23hb	ASAS-SN	Present in several epochs, on the rise, nuclear source, so could also be a TDE	2023TNSTR2562....1S	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

15824

2023-10-20 12:35:05

Kenta Taguchi

Kohki Uno (Kyoto University), Kenta Taguchi (Kyoto University), Keiichi Maeda (Kyoto University), Eleni Koutsiona (Kyoto University, the University of Crete), Miho Kawabata (Kyoto University)

None

SN Ia

0.036812

After a more detailed discussion and analysis, SN2023uta is preffered to an SN Ia rather than SLSN. Indeed, although the gelato system does not suggest SNe Ia, the spectrum is well fitted by the spectra of PTF10cmj and SN2019giy around their peaks. In addition, the redshit is z=0.036812. Assuming the usual cosmological parameters, the distance modulus is estimated to be ~36.0, and the absolute mag should be ~ -19.2 mag, which is typical magnitude of SNe Ia. We conclude that SN 2023uta is an SN Ia, not SLSN.

2023TNSCR2672....1U

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
15910	2023-10-17 15:09:35	Other / Other	1800	Eleni Koutsiona, Kenta Taguchi, Miho Kawabata	Kenta Taguchi	None	tns_2023uta_2023-10-17_15-09-35_Other_Other.dat	tns_2023uta_2023-10-17_15-09-35_Other_Other.fits	Object			We performed a spectroscopic follow-up observation with KOOLS-IFU mounted on the 3.8-m Seimei telescope at Okayama Observatory of Kyoto University. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8500 A.

15762

2023-10-12 22:55:21

Kenta Taguchi

Kohki Uno (Kyoto University), Tatsuya Nakaoka (Hiroshima University), Kenta Taguchi (Kyoto University), Keiichi Maeda (Kyoto University), Masaki Tsurumi (Kyoto University)

None

SLSN-I

0.036812

Our spectrum is similar to that of SLSN-I 2017egm. In addition, considering its photo-z redshift (z=0.037), the absolute magnitude reaches ~-20mag. Therefore, we propose that this transient is an SLSN-I.

2023TNSCR2570....1U

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
15848	2023-10-12 19:58:25	Other / Other	1800	Kohki Uno, Masaki Tsurumi	Kenta Taguchi	None	tns_2023uta_2023-10-12_19-58-25_Other_Other.dat	tns_2023uta_2023-10-12_19-58-25_Other_Other.fits	Object			We performed a spectroscopic follow-up observation with KOOLS-IFU mounted on the 3.8-m Seimei telescope at Okayama Observatory of Kyoto University. The spectral resolution is ~ 500, and the wavelength coverage is 4100-8500 A.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 194412 of Group Pan-STARRS
Previous RA, DEC: 07:09:38.326, +54:56:59.14 (107.40969, +54.949762)
Updated RA, DEC: 07:09:38.285, +54:56:59.75 (107.409521039, 54.9499292327)

Object coordinates updated

Object coordinates updated according to AT-report 190407 of Group ATLAS
Previous RA, DEC: 07:09:38.230, +54:57:00.07 (107.40929, +54.95002)
Updated RA, DEC: 07:09:38.326, +54:56:59.14 (107.40969, 54.949762)

Typo on the classification comment

In the classification comment (ID: 15762), "considering its photo-z redshift" should be "considering its spec-z redshift".