2017gav | Transient Name Server

RA/DEC (2000)

17:03:21.130 +45:24:48.74

255.838042 +45.413539

Type

SN Ia

Redshift

0.033

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2017-08-12 07:53:45.000

TNS AT

Y

Public

Y

Host Name

SDSS J170321.30+452447.5

Discovery Mag

16.9

Filter

V-Johnson

Reporter/s

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

Gaia_Gaia-photometric_G

▌

ASASSN-1_Brutus_V

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
	1112	2017-08-16 06:00:00	Plaskett / Plaskett	3600	Balam	Balam, Hsiao	DAO_OTS	tns_2017gav_2017-08-16.25_Plaskett_Telescope_Plaskett_DAO_OTS.dat	tns_2017gav_2017-08-16.25_Plaskett_Telescope_Plaskett_DAO_OTS.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-Gaia

Gaia_Gaia-photometric

2017-08-07 15:11:31 - 2017-08-07 16:58:04

2457973.1329977 - 2457973.2069907

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
20122	2017-08-07 16:58:04	2457973.2069907	17.47	0.2		ABMag	G-Gaia	Gaia_Gaia-photometric	60	Robot
20121	2017-08-07 15:11:31	2457973.1329977			21.5	ABMag	G-Gaia	Gaia_Gaia-photometric		Robot	[Last non detection]

V-Johnson

ASASSN-1_Brutus

2017-08-09 08:09:36 - 2017-08-12 07:53:45

2457974.84 - 2457977.8289931

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
19432	2017-08-12 07:53:45	2457977.8289931	16.9			VegaMag	V-Johnson	ASASSN-1_Brutus
19431	2017-08-09 08:09:36	2457974.84			17.5	STMag	V-Johnson	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	Related files	AT Type	Host name	Internal name	Assoc. Groups	End prop. period	Remarks	ADS Bibcode	Unreal	Auto classification
13491	2017-09-07 09:45:11	Gaia_Bot1	A. Delgado, D. Harrison, S. Hodgkin et al.	GaiaAlerts	GaiaAlerts	17:03:21.130	+45:24:48.74	2017-08-07 16:58:04.000	17.47	G-Gaia		PSN		Gaia17cfz	GaiaAlerts		Confirmed SN Ia near galaxy SDSS J170321.30+452447.5, aka ASASSN-17kt, SN2017gav. Declining.		N
13057	2017-08-13 17:28:20	Krzysztof Stanek	K. Z. Stanek, for the ASAS-SN team	ASAS-SN	ASAS-SN	17:03:21.091	+45:24:48.64	2017-08-12 07:53:45.000	16.9	V-Johnson		PSN	SDSS J170321.30+452447.5	ASASSN-17kt	ASAS-SN		Faint SDSS galaxy present at the SN candidate position	2017TNSTR.862....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

1108

2017-08-17 00:47:27

Dave Balam

Dave Balam

DAO_OTS

SN Ia

0.033

1

DAO_OTS

D. D. Balam, Dominion Astrophysical Observatory, National Research Council of Canada, K. Thanjavur (University of Victoria) and E. Hsiao, Florida State University report that a spectrogram (range 390-710 nm, resolution 0.3 nm) of SN 2017gav obtained on Aug. 16.25 UT with the 1.82-m Plaskett Telescope of the National Research Council of Canada, shows it to be a normal type Ia supernova near maximum light. Cross- correlation with a library of supernova spectra using the "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666,1024) suggests that SN 2017gav is most similar to the normal type-Ia supernova at maximum light. Our solution yields a red shift of 0.033.

2017TNSCR.880....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
1112	2017-08-16 06:00:00	Plaskett / Plaskett	3600	Balam	Balam, Hsiao	DAO_OTS	tns_2017gav_2017-08-16.25_Plaskett_Telescope_Plaskett_DAO_OTS.dat	tns_2017gav_2017-08-16.25_Plaskett_Telescope_Plaskett_DAO_OTS.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 13491 of Group GaiaAlerts
Previous RA, DEC: 17:03:21.091, +45:24:48.64 (255.83788, +45.41351)
Updated RA, DEC: 17:03:21.130, +45:24:48.74 (255.838042, 45.413539)

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