2021abvm | Transient Name Server

RA/DEC (2000)

20:34:21.510 -54:59:20.40

308.589625 -54.989

Type

SN Ia

Redshift

0.04

Discovery Report Classification Report

Related AstroNotes: 2021-285

Reporting Group

None

Discovering Data Source

ASAS-SN

Discovery Date

2021-10-17 00:43:12.000

TNS AT

Y

Public

Y

Host Name

WISEA J203421.94-545912.0

Host Redshift

0.040124

Discovery Mag

17

Filter

g-Sloan

Reporter/s

B. Nicholls, J. Brimacombe, M. Riizzo Smith, K. Z. Stanek, C. S. Kochanek, for the ASAS-SN team

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

ASASSN-5_Payne-Gaposchkin_g

▌

ASASSN-3_Paczynski_g

▌

Gaia_Gaia-photometric_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
	11330	2021-11-06 00:33:51	ESO-NTT / EFOSC2-NTT	300	R.Carini,F.Ragosta	S.Benetti,L.Tartaglia	ePESSTO+	tns_2021abvm_2021-11-06_00-33-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2021abvm_2021-11-06_00-33-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits	Object
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

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

g-Sloan

ASASSN-5_Payne-Gaposchkin

2021-10-07 22:48:00 - 2021-10-07 22:48:00

2459495.45 - 2459495.45

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
248189	2021-10-07 22:48:00	2459495.45			18.1	ABMag	g-Sloan	ASASSN-5_Payne-Gaposchkin			[Last non detection]

g-Sloan

ASASSN-3_Paczynski

2021-10-17 00:43:12 - 2021-10-17 00:43:12

2459504.53 - 2459504.53

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
248190	2021-10-17 00:43:12	2459504.53	17			ABMag	g-Sloan	ASASSN-3_Paczynski

G-Gaia

Gaia_Gaia-photometric

2021-09-07 21:38:53 - 2021-10-15 15:08:38

2459465.402 - 2459503.131

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
248300	2021-10-15 15:08:38	2459503.131	17.14	0.2		ABMag	G-Gaia	Gaia_Gaia-photometric	60	Robot
248299	2021-09-07 21:38:53	2459465.402			21.5	ABMag	G-Gaia	Gaia_Gaia-photometric		Robot	[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
126569	2021-10-21 12:27:26	Gaia_Bot1	S.T. Hodgkin, E. Breedt, A. Delgado et al.	GaiaAlerts	GaiaAlerts	20:34:21.510	-54:59:20.40	2021-10-15 15:08:38.400	17.14	G-Gaia		PSN		Gaia21esl	GaiaAlerts		Candidate SN near galaxy 2MASX J20342202-5459123		N
126501	2021-10-19 13:06:52	Krzysztof Stanek	B. Nicholls, J. Brimacombe, M. Riizzo Smith et al.	ASAS-SN	ASAS-SN	20:34:21.713	-54:59:18.82	2021-10-17 00:43:12.000	17	g-Sloan		PSN	WISEA J203421.94-545912.0	ASASSN-21tm	ASAS-SN		Present in several epochs, on the rise	2021TNSTR3577....1N	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

11276

2021-11-06 15:55:51

ePESSTOplus_Bot1

R.Carini,F.Ragosta, S.Benetti,L.Tartaglia, N. L. Strotjohann on behalf of ePESSTO+

ePESSTO+

SN Ia

0.04

1

ePESSTO+

2021TNSCR3787....1C

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
11330	2021-11-06 00:33:51	ESO-NTT / EFOSC2-NTT	300	R.Carini,F.Ragosta	S.Benetti,L.Tartaglia	ePESSTO+	tns_2021abvm_2021-11-06_00-33-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2021abvm_2021-11-06_00-33-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits	Object

Comments

Finding Chart

http://www.astronomy.ohio-state.edu/~assassin/followup/asassn-21tm.png

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Object coordinates updated

Object coordinates updated according to AT-report 126569 of Group GaiaAlerts
Previous RA, DEC: 20:34:21.713, -54:59:18.82 (308.59047, -54.98856)
Updated RA, DEC: 20:34:21.510, -54:59:20.40 (308.589625, -54.989)

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