2018hfg | Transient Name Server

RA/DEC (2000)

08:52:56.190 +42:24:46.48

133.234125 +42.412911

Type

SN IIn

Redshift

0.023863

Discovery Report Classification Report

Reporting Group

ASAS-SN

Discovering Data Source

ASAS-SN

Discovery Date

2018-10-09 11:45:36.000

TNS AT

Y

Public

Y

Host Name

UGC 04642

Host Redshift

0.023863

Discovery Mag

16.9

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
	2876	2018-10-11 01:40:48	Ekar / AFOSC	900	Nascimbeni, Granata	Benetti	Padova-Asiago	tns_2018hfg_2018-10-11.07_Ekar_AFOSC_Padova-Asiago.dat	tns_2018hfg_2018-10-11.07_Ekar_AFOSC_Padova-Asiago.fits	Object		2019-10-11
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
	2872	2018-10-10 20:13:03	BAO-2.16m / Cassegrain	3000	Jia junjun	Hann Sai	TNTS	tns_2018hfg_2458402.3424_BAO-2.16m_Cassegrain_TNTS.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
	2878	2018-10-10 12:57:36	Lick-3m / KAST		WeiKang Zheng	Thomas Brink	LOSS	tns_2018hfg_2018-10-10.540_Lick_3m_KAST_LOSS.flm		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

2019-02-20 08:50:46 - 2019-04-09 04:42:54

2458534.868588 - 2458582.6964583

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
60556	2019-04-09 04:42:54	2458582.6964583	17.47	0.06	20.61	ABMag	r-ZTF	P48_ZTF-Cam	30
54592	2019-02-26 05:13:55	2458540.7179977	17.08			ABMag	r-ZTF	P48_ZTF-Cam	30	ZTF
54591	2019-02-20 08:51:21	2458534.8689931	17.01			ABMag	r-ZTF	P48_ZTF-Cam	30	ZTF
60557	2019-02-20 08:50:46	2458534.868588	17.01	0.08	18.85	ABMag	r-ZTF	P48_ZTF-Cam	30

g-Sloan

ASASSN-4_Leavitt

2018-10-04 11:31:12 - 2018-10-09 11:45:36

2458395.98 - 2458400.99

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
37371	2018-10-09 11:45:36	2458400.99	16.9			ABMag	g-Sloan	ASASSN-4_Leavitt
37370	2018-10-04 11:31:12	2458395.98			18	ABMag	g-Sloan	ASASSN-4_Leavitt			[Last non detection]

G-Gaia

Gaia_Gaia-photometric

2018-05-30 12:34:33 - 2018-10-07 06:48:57

2458269.0239931 - 2458398.7839931

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
39781	2018-10-07 06:48:57	2458398.7839931	17.01	0.2		ABMag	G-Gaia	Gaia_Gaia-photometric	60	Robot
39780	2018-05-30 12:34:33	2458269.0239931			21.5	ABMag	G-Gaia	Gaia_Gaia-photometric		Robot	[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2018-10-23 13:40:47 - 2018-10-23 13:40:47

2458415.0699884 - 2458415.0699884

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
37955	2018-10-23 13:40:47	2458415.0699884	16.382	0.035	18.47	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2018-09-23 14:41:16 - 2018-09-23 14:41:16

2458385.1119907 - 2458385.1119907

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
37954	2018-09-23 14:41:16	2458385.1119907			18.76	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

w-P1

PS1_GPC1

2018-12-16 14:00:57 - 2018-12-16 14:00:57

2458469.0839931 - 2458469.0839931

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
46427	2018-12-16 14:00:57	2458469.0839931	16.57	0.01	22	ABMag	w-P1	PS1_GPC1	45	Robot

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
32659	2019-04-09 13:56:48	ZTF_AMPEL_COMPLETE	J. Nordin, V. Brinnel, M. Giomi et al.	ZTF	ZTF	08:52:56.183	+42:24:46.50	2019-02-20 08:50:46.000	17.47	r-ZTF		PSN		ZTF18acsulmu	ZTF				N
30313	2019-02-28 08:38:24	ZTF_Bot1	C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaboration	ZTF	ZTF	08:52:56.189	+42:24:46.50	2019-02-20 08:51:21.000	17.01	r-ZTF		PSN		ZTF18acsulmu	ZTF				N
26567	2018-12-17 23:30:05	PS1_Bot1	K. C. Chambers, M. E. Huber, H. Flewelling et al.	Pan-STARRS	Pan-STARRS	08:52:56.186	+42:24:46.41	2018-12-16 14:00:57.000	16.57	w-P1		PSN		PS18cde	Pan-STARRS				N
24422	2018-11-08 10:21:14	Gaia_Bot1	A. Delgado, D. Harrison, S. Hodgkin et al.	GaiaAlerts	GaiaAlerts	08:52:56.190	+42:24:46.48	2018-10-07 06:48:57.000	17.01	G-Gaia		PSN		Gaia18dia	GaiaAlerts		confirmed SN II aka ASASSN-18xk		N
23728	2018-10-24 15:39:02	ATLAS_Bot1	J. Tonry, L. Denneau, A. Heinze et al.	ATLAS	ATLAS	08:52:56.180	+42:24:46.57	2018-10-23 13:40:47.000	16.382	orange-ATLAS		PSN		ATLAS18xsq	ATLAS				N
23434	2018-10-09 21:19:05	Krzysztof Stanek	K. Z. Stanek, for the ASAS-SN team	ASAS-SN	ASAS-SN	08:52:56.316	+42:24:47.02	2018-10-09 11:45:36.000	16.9	g-Sloan		PSN	UGC 04642	ASASSN-18xk	ASAS-SN		In several epochs, on the rise	2018TNSTR1532....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

2871

2018-10-11 20:54:55

Weikang Zheng

Weikang Zheng, Thomas Brink, Alexei V. Filippenko (UC Berkeley)

LOSS

SN IIn

1

LOSS

We confirmed it is a type IIn SN also classified by Nascimbeni et al. (ATel 12101) and Sai et al. (ATel 12102).

2018TNSCR2154....1Z

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
2878	2018-10-10 12:57:36	Lick-3m / KAST		WeiKang Zheng	Thomas Brink	LOSS	tns_2018hfg_2018-10-10.540_Lick_3m_KAST_LOSS.flm		Object

2869

2018-10-11 09:01:01

Lina Tomasella

V. Nascimbeni, V. Granata (DFA-UniPd), S. Benetti, E. Cappellaro, L. Tomasella, M. Turatto (INAF OAPd)

Padova-Asiago

SN IIn

0.023863

1

Padova-Asiago

Spectrum similar to those of several type IIn supernovae (including SN 2009ip) several days after explosion. Redshift of the host galaxy UGC 04642 is from Fisher et al. 1995 (ApJS 100, 69 via NED)

2018TNSCR2155....1N

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
2876	2018-10-11 01:40:48	Ekar / AFOSC	900	Nascimbeni, Granata	Benetti	Padova-Asiago	tns_2018hfg_2018-10-11.07_Ekar_AFOSC_Padova-Asiago.dat	tns_2018hfg_2018-10-11.07_Ekar_AFOSC_Padova-Asiago.fits	Object		2019-10-11

2865

2018-10-11 06:48:56

Hanna Sai

H. Sai, X. Wang, H. Lin, X. Zhang, D. Xiang, L. Rui(THU), H. Wang, T. Zhang (NAOC), J. Zhang (YNAO)

TNTS

SN IIn-pec

0.023863

1

TNTS

2018TNSCR1556....1S

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
2872	2018-10-10 20:13:03	BAO-2.16m / Cassegrain	3000	Jia junjun	Hann Sai	TNTS	tns_2018hfg_2458402.3424_BAO-2.16m_Cassegrain_TNTS.txt		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 24422 of Group GaiaAlerts
Previous RA, DEC: 08:52:56.316, +42:24:47.02 (133.23465, +42.41306)
Updated RA, DEC: 08:52:56.190, +42:24:46.48 (133.234125, 42.412911)

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Finding Chart

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

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