2017eex | Transient Name Server

RA/DEC (2000)

10:23:19.360 +22:23:38.47

155.830667 +22.394019

Type

SN Ia

Redshift

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2017-05-21 06:28:48.000

TNS AT

Y

Public

Y

Host Name

MCG +04-25-014

Host Redshift

0.03966

Comments

[Object redshift updated according to host-redshift by admin]

Discovery Mag

17.4

Filter

V-Johnson

Reporter/s

G. Stone, R. Post, 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
	1015	2017-05-23 04:42:30	FLWO-1.5m / FAST		M. Calkins (Harvard CfA)		ASAS-SN	tns_2017eex_2457896.696195_FLWO_1.5m_FAST_ASAS-SN.txt	tns_2017eex_2457896.696195_FLWO_1.5m_FAST_ASAS-SN.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

G-Gaia

Gaia_Gaia-photometric

2017-04-12 22:03:21 - 2017-05-21 15:17:16

2457856.4189931 - 2457895.1369907

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
17239	2017-05-21 15:17:16	2457895.1369907	17.58	0.2		ABMag	G-Gaia	Gaia_Gaia-photometric	60	Robot
17238	2017-04-12 22:03:21	2457856.4189931			21.5	ABMag	G-Gaia	Gaia_Gaia-photometric		Robot	[Last non detection]

V-Johnson

ASASSN-1_Brutus

2017-05-14 07:12:00 - 2017-05-21 06:28:48

2457887.8 - 2457894.77

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
17206	2017-05-21 06:28:48	2457894.77	17.4			VegaMag	V-Johnson	ASASSN-1_Brutus
17207	2017-05-16 06:57:36	2457889.79	17.4			VegaMag	V-Johnson	ASASSN-1_Brutus
17205	2017-05-14 07:12:00	2457887.8			17.4	VegaMag	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
11653	2017-05-23 07:25:30	Gaia_Bot1	A. Delgado, D. Harrison, S. Hodgkin et al.	GaiaAlerts	GaiaAlerts	10:23:19.360	+22:23:38.47	2017-05-21 15:17:16.000	17.58	G-Gaia		PSN		Gaia17big	GaiaAlerts		candidate SN near galaxy MCG +04-25-014, GS-TEC predicts SN Ia t=5 (aka ASASSN-17gl)		N
11629	2017-05-22 04:28:20	Krzysztof Stanek	G. Stone, R. Post, K. Z. Stanek et al.	ASAS-SN	ASAS-SN	10:23:19.406	+22:23:38.29	2017-05-21 06:28:48.000	17.4	V-Johnson		PSN	MCG +04-25-014	ASASSN-17gl	ASAS-SN		In several epochs, confirmed by R. Post and G. Stone	2017TNSTR.575....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

1005

2017-05-23 18:22:24

Jose Prieto

E. Falco (Harvard CfA), J. L. Prieto (UDP; MAS)

ASAS-SN

SN Ia

1

ASAS-SN

We obtained an optical spectrum of ASASSN-17gl/AT2017eex on UT 2017 May 23.2 with FAST mounted on the FLWO 1.5m telescope. The spectrum is that of a normal SN Ia at maximum light. Cross-correlation with a library of SN spectra using SNID (Blondin & Tonry 2007) shows that ASASSN-17gl is best fit with normal SN Ia at an age of +3 days after maximum light (best-fit template is the spectrum of SN Ia 2001ep at +3 days). After correcting for the host galaxy redshift, we measure a Si II 6355 Angs. expansion velocity of 10800 km/s.

2017TNSCR.584....1F

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
1015	2017-05-23 04:42:30	FLWO-1.5m / FAST		M. Calkins (Harvard CfA)		ASAS-SN	tns_2017eex_2457896.696195_FLWO_1.5m_FAST_ASAS-SN.txt	tns_2017eex_2457896.696195_FLWO_1.5m_FAST_ASAS-SN.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 11653 of Group GaiaAlerts
Previous RA, DEC: 10:23:19.406, +22:23:38.29 (155.830858, +22.393969)
Updated RA, DEC: 10:23:19.360, +22:23:38.47 (155.830667, 22.394019)

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