2018hfu | Transient Name Server

RA/DEC (2000)

23:54:50.918 +05:42:58.34

358.712159 +5.7162053

Type

SN Ia-91T-like

Redshift

0.0498

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2018-10-09 21:36:00.000

TNS AT

Y

Public

Y

Discovery Mag

17.8

Filter

g-Sloan

Reporter/s

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

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
	2979	2018-11-03 07:27:19	P60 / SEDM	1600	SEDmRobot	auto	ZTF	tns_2018hfu_2018-11-03_07-27-19_P60_SED-Machine_ZTF.ascii		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
	2907	2018-10-15 22:17:51	LT / SPRAT	800	S. Prentice		None	tns_2018hfu_2018-10-15_22-17-51_LT_SPRAT.txt		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

r-ZTF

P48_ZTF-Cam

2018-10-06 06:51:50 - 2018-11-10 06:09:46

2458397.7859954 - 2458432.756794

11

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
40850	2018-11-10 06:09:46	2458432.756794	18.0318	0.0566281	20.1338	ABMag	r-ZTF	P48_ZTF-Cam	30
42822	2018-11-10 06:09:46	2458432.756794	18.0318	0.0566281	20.1338	ABMag	r-ZTF	P48_ZTF-Cam	30
40855	2018-11-07 06:12:33	2458429.7587153	17.9905	0.0516067	20.6622	ABMag	r-ZTF	P48_ZTF-Cam	30
39387	2018-11-07 06:12:33	2458429.7587153	17.9905	0.0516067	20.6622	ABMag	r-ZTF	P48_ZTF-Cam	30
42820	2018-11-07 06:12:33	2458429.7587153	17.9905	0.0516067	20.6622	ABMag	r-ZTF	P48_ZTF-Cam	30
42818	2018-11-04 05:44:32	2458426.7392708	17.9457	0.0526793	20.0716	ABMag	r-ZTF	P48_ZTF-Cam	30
38993	2018-11-04 05:44:32	2458426.7392708	17.9457	0.0526793	20.0716	ABMag	r-ZTF	P48_ZTF-Cam	30
39111	2018-11-04 05:44:32	2458426.7392708	17.9457	0.0526793	20.0716	ABMag	r-ZTF	P48_ZTF-Cam	30
40853	2018-11-04 05:44:32	2458426.7392708	17.9457	0.0526793	20.0716	ABMag	r-ZTF	P48_ZTF-Cam	30
39390	2018-11-04 05:44:32	2458426.7392708	17.9457	0.0526793	20.0716	ABMag	r-ZTF	P48_ZTF-Cam	30
38414	2018-10-06 06:51:50	2458397.7859954	18.48			ABMag	r-ZTF	P48_ZTF-Cam	30	ZTF

g-ZTF

P48_ZTF-Cam

2018-11-01 05:12:08 - 2018-11-10 05:30:35

2458423.7167593 - 2458432.7295833

16

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
42821	2018-11-10 05:30:35	2458432.7295833	18.5698	0.086214	20.3051	ABMag	g-ZTF	P48_ZTF-Cam	30
40849	2018-11-10 05:30:35	2458432.7295833	18.5698	0.086214	20.3051	ABMag	g-ZTF	P48_ZTF-Cam	30
42819	2018-11-07 05:06:30	2458429.7128472	18.2431	0.0598477	20.7532	ABMag	g-ZTF	P48_ZTF-Cam	30
40854	2018-11-07 05:06:30	2458429.7128472	18.2431	0.0598477	20.7532	ABMag	g-ZTF	P48_ZTF-Cam	30
39386	2018-11-07 05:06:30	2458429.7128472	18.2431	0.0598477	20.7532	ABMag	g-ZTF	P48_ZTF-Cam	30
39389	2018-11-04 05:23:58	2458426.7249769	18.0245	0.0633409	20.2281	ABMag	g-ZTF	P48_ZTF-Cam	30
40852	2018-11-04 05:23:58	2458426.7249769	18.0245	0.0633409	20.2281	ABMag	g-ZTF	P48_ZTF-Cam	30
42824	2018-11-04 05:23:58	2458426.7249769	18.0245	0.0633409	20.2281	ABMag	g-ZTF	P48_ZTF-Cam	30
39110	2018-11-04 05:23:58	2458426.7249769	18.0245	0.0633409	20.2281	ABMag	g-ZTF	P48_ZTF-Cam	30
38992	2018-11-04 05:23:58	2458426.7249769	18.0245	0.0633409	20.2281	ABMag	g-ZTF	P48_ZTF-Cam	30
38415	2018-11-01 05:12:28	2458423.7169907	17.73			ABMag	g-ZTF	P48_ZTF-Cam	30	ZTF
40851	2018-11-01 05:12:08	2458423.7167593	17.7272	0.0451146	20.5832	ABMag	g-ZTF	P48_ZTF-Cam	30
39388	2018-11-01 05:12:08	2458423.7167593	17.7272	0.0451146	20.5832	ABMag	g-ZTF	P48_ZTF-Cam	30
39109	2018-11-01 05:12:08	2458423.7167593	17.7272	0.0451146	20.5832	ABMag	g-ZTF	P48_ZTF-Cam	30
38991	2018-11-01 05:12:08	2458423.7167593	17.7272	0.0451146	20.5832	ABMag	g-ZTF	P48_ZTF-Cam	30
42823	2018-11-01 05:12:08	2458423.7167593	17.7272	0.0451146	20.5832	ABMag	g-ZTF	P48_ZTF-Cam	30

g-Sloan

ASASSN-5_Payne-Gaposchkin

2018-10-04 19:40:48 - 2018-10-09 21:36:00

2458396.32 - 2458401.4

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
37402	2018-10-09 21:36:00	2458401.4	17.8			ABMag	g-Sloan	ASASSN-5_Payne-Gaposchkin
37401	2018-10-04 19:40:48	2458396.32			18.4	ABMag	g-Sloan	ASASSN-5_Payne-Gaposchkin			[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2018-10-05 10:50:52 - 2018-10-05 10:50:52

2458396.9519907 - 2458396.9519907

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
37539	2018-10-05 10:50:52	2458396.9519907	18.889	0.196	18.87	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2018-10-03 11:42:43 - 2018-10-03 11:42:43

2458394.9879977 - 2458394.9879977

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
37538	2018-10-03 11:42:43	2458394.9879977			19.41	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	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
25270	2018-11-21 13:15:51	ZTF_AMPEL_NEW	J. Nordin, V. Brinnel, M. Giomi et al.	ZTF	ZTF	23:54:50.918	+05:42:58.34	2018-10-06 06:51:21.000	17.9457	r-ZTF		PSN		ZTF18acahuph	ZTF				N
24691	2018-11-10 14:20:20	ZTF_AMPEL_NEW	J. Nordin, V. Brinnel, M. Giomi (HU Berlin) et al.	ZTF	ZTF	23:54:50.919	+05:42:58.17	2018-10-06 06:51:21.000	18.5698	g-ZTF		PSN		ZTF18acahuph	ZTF				N
24300	2018-11-07 15:20:54	ZTF_AMPEL_NEW	J. Nordin, V. Brinnel (HU Berlin), A. Gal-Yam et al.	ZTF	ZTF	23:54:50.917	+05:42:58.28	2018-10-06 06:51:21.000	18.2431	g-ZTF		PSN		ZTF18acahuph	ZTF				N
24219	2018-11-07 14:54:17	ZTF_AMPEL_NEW	J. Nordin, V. Brinnel (HU Berlin), A. Gal-Yam et al.	ZTF	ZTF	23:54:50.919	+05:42:58.31	2018-10-06 06:51:21.000	17.7272	g-ZTF		PSN		ZTF18acahuph	ZTF				N
24190	2018-11-07 14:52:27	ZTF_AMPEL_NEW	J. Nordin, V. Brinnel (HU Berlin), A. Gal-Yam et al.	ZTF	ZTF	23:54:50.919	+05:42:58.31	2018-10-06 06:51:21.000	17.7272	g-ZTF		PSN		ZTF18acahuph	ZTF				N
23944	2018-11-04 05:24:48	ZTF_Bot1	C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaboration	ZTF	ZTF	23:54:50.924	+05:42:58.26	2018-10-06 06:51:50.000	18.48	r-ZTF		PSN		ZTF18acahuph	ZTF				N
23517	2018-10-14 19:45:42	ATLAS_Bot1	J. Tonry, L. Denneau, A. Heinze et al.	ATLAS	ATLAS	23:54:50.919	+05:42:58.20	2018-10-05 10:50:52.000	18.889	orange-ATLAS		PSN		ATLAS18wrk	ATLAS				N
23449	2018-10-10 20:12:44	Krzysztof Stanek	K. Z. Stanek, for the ASAS-SN team	ASAS-SN	ASAS-SN	23:54:51.094	+05:42:57.60	2018-10-09 21:36:00.000	17.8	g-Sloan		PSN		ASASSN-18xp	ASAS-SN		In several epochs, very faint (g~22) SDSS host galaxy	2018TNSTR1539....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

2971

2018-11-05 22:36:18

ZTF_Bot1

C. Fremling, A. Dugas, Y. Sharma (Caltech) on behalf of the Zwicky Transient Facility (ZTF)

ZTF

SN Ia-91T-like

0.0498

1

ZTF

2018TNSCR2162....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
2979	2018-11-03 07:27:19	P60 / SEDM	1600	SEDmRobot	auto	ZTF	tns_2018hfu_2018-11-03_07-27-19_P60_SED-Machine_ZTF.ascii		Object

2899

2018-10-15 22:52:09

Simon Prentice

S. J. Prentice (QUB)

None

SN Ia-pec

0.06

1

The spectrum matches several SNe Ia of varying types around maximum light. Using SNID (Blondin and Tonry 2007, Ap.J. 666, 1024), good matches can be found to 2000cx at z=0.054 and 91T-like SN 1999aa at z=0.066. The given redshift of 0.06 is an average between the two and the classification as SN Ia-pec reflects that the two best templates are not normal SNe Ia.

2018TNSCR1585....1P

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
2907	2018-10-15 22:17:51	LT / SPRAT	800	S. Prentice		None	tns_2018hfu_2018-10-15_22-17-51_LT_SPRAT.txt		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 25270 of Group ZTF
Previous RA, DEC: 23:54:51.094, +05:42:57.60 (358.71289, +5.716)
Updated RA, DEC: 23:54:50.918, +05:42:58.34 (358.712159, 5.7162053)

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Finding Chart

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

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