2018dys | Transient Name Server

RA/DEC (2000)

12:55:10.160 -05:34:07.68

193.79233494 -5.56880060241

Type

SN Ic

Redshift

0.055

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2018-07-15 01:12:00.000

TNS AT

Public

Host Name

GALEXASC J125510.22-053406.8

Discovery Mag

17.4

Filter

V-Johnson

Reporter/s

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

ATLAS-HKO_ATLAS-02_cyan

▌

ASASSN-2_Cassius_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
	2296	2018-07-21 18:30:14	UH88 / SNIFS	600	Tucker, Rowan, Shappee		SCAT	tns_2018dys_2458321.271_UH88_SNIFS_SCAT.dat		Object			Reduced using a summit quick reduction pipeline intended for quick look and classifications purposes. Care should be taken before re-using this spectrum for further science.
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 Reduced using a summit quick reduction pipeline intended for quick look and classifications purposes. Care should be taken before re-using this spectrum for further science.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

cyan-ATLAS

ATLAS-HKO_ATLAS-02

2018-08-04 06:15:50 - 2018-08-08 06:04:19

2458334.7609954 - 2458338.7529977

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
34036	2018-08-08 06:04:19	2458338.7529977	18.323	0.104	18.93	ABMag	cyan-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot
34035	2018-08-04 06:15:50	2458334.7609954			16.57	ABMag	cyan-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

V-Johnson

ASASSN-2_Cassius

2018-07-01 02:09:36 - 2018-07-15 01:12:00

2458300.59 - 2458314.55

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
32099	2018-07-15 01:12:00	2458314.55	17.4			VegaMag	V-Johnson	ASASSN-2_Cassius
32098	2018-07-01 02:09:36	2458300.59			17.4	VegaMag	V-Johnson	ASASSN-2_Cassius			[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
21727	2018-08-18 16:16:08	ATLAS_Bot1	J. Tonry, B. Stalder, L. Denneau et al.	ATLAS	ATLAS	12:55:10.160	-05:34:07.68	2018-08-08 06:04:19.000	18.323	cyan-ATLAS		PSN		ATLAS18two	ATLAS				N
20689	2018-07-15 22:59:54	Krzysztof Stanek	P. Cacella, K. Z. Stanek, for the ASAS-SN team	ASAS-SN	ASAS-SN	12:55:10.226	-05:34:11.57	2018-07-15 01:12:00.000	17.4	V-Johnson		PSN	GALEXASC J125510.22-053406.8	ASASSN-18ph	ASAS-SN		In several epochs, unknown redshift host	2018TNSTR.984....1C	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

2289

2018-07-22 09:18:48

Michael Tucker

Michael A. Tucker, Dominick M. Rowan, Benjamin J. Shappee (IfA, UH Manoa)

SCAT

SN Ic

0.055

SCAT

The SCAT survey presents optical spectrum (330-970nm) classification of ASASSN-18ph (SN 2018dys) as a Type Ic-norm supernova a few days after maximum light. The spectrum was obtained on the UH88inch telescope with the SNIFS IFU on MJD 58321.271 with an exposure time of 600 sec.

2018TNSCR1016....1T

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
2296	2018-07-21 18:30:14	UH88 / SNIFS	600	Tucker, Rowan, Shappee		SCAT	tns_2018dys_2458321.271_UH88_SNIFS_SCAT.dat		Object			Reduced using a summit quick reduction pipeline intended for quick look and classifications purposes. Care should be taken before re-using this spectrum for further science.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 21727 of Group ATLAS
Previous RA, DEC: 12:55:10.226, -05:34:11.57 (193.79261, -5.56988)
Updated RA, DEC: 12:55:10.160, -05:34:07.68 (193.79233494, -5.56880060241)

AT 2018dys

We observed AT 2018dys on 2018-07-16.903

AT_2018_dys.jpg

Finding Chart

http://www.astronomy.ohio-state.edu/~assassin/followup/asassn-18ph.png