2021iyt | Transient Name Server

RA/DEC (2000)

10:18:44.410 +00:03:19.43

154.685042503 +0.055396560455

Type

SN Ibn

Redshift

0.0712

Discovery Report Classification Report

Reporting Group

YSE

Discovering Data Source

Pan-STARRS

Discovery Date

2021-04-09 08:39:50.400

TNS AT

Public

Discovery Mag

19.97

Filter

r-Sloan

Reporter/s

D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello, C. R. Angus, Z. Ansari, N. Arendse, C. Gall, C. Grillo, S. H. Bruun, C. Hede, J. Hjorth, L. Izzo, H. Korhonen, S. Raimundo, D. Kodi Ramanah, A. Sarangi, R. Wojtak, H. Pfister (DARK, U Copenhagen), K. Auchettl (DARK, UC Santa Cruz, U Melbourne), K. C. Chambers, M. E. Huber, E. A. Magnier, T. J. L. de Boer, J. R. Fairlamb, C. C. Lin, R. J. Wainscoat, T. Lowe, M. Willman, J. Bulger, A. S. B. Schultz (IfA, Hawaii), A. Engel, A. Gagliano, G. Narayan, M. Soraisam (Illinois), Q. Wang (JHU), A. Rest (JHU, STScI), S. J. Smartt, K. W. Smith (Queen's University Belfast), K. Alexander, A. Baldeschi, P. Blanchard, D. Coppejans, L. DeMarchi, A. Hajela, W. Jacobson-Galan, R. Margutti, D. Matthews, C. Stauffer, M. Stroh, G. Terreran (Northwestern), M. Drout (U Toronto), D. A. Coulter, G. Dimitriadis, R. J. Foley, T. Hung, C. D. Kilpatrick, C. Rojas-Bravo, M. R. Siebert (UC Santa Cruz), E. Ramirez-Ruiz (UC Santa Cruz, DARK)

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	Observer/s	Reducer/s	Group	Spectrum ascii file	Spec. Type
	9651	2021-05-12 00:00:00	Keck1 / LRIS	M. Siebert, S. Tinyanont	M. Siebert	UCSC	tns_2021iyt_2021-05-12_00-00-00_Keck1_LRIS_UCSC.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
	9391	2021-04-10 00:00:00	NOT / ALFOSC	C Angus		YSE	tns_2021iyt_2021-04-10_NOT_ALFOSC_YSE.csv	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

w-P1

PS2_GPC2

2021-04-13 06:08:38 - 2021-04-13 06:08:38

2459317.756 - 2459317.756

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
216112	2021-04-13 06:08:38	2459317.756	18.61	0.03	22	ABMag	w-P1	PS2_GPC2	45	Robot

g-ZTF

P48_ZTF-Cam

2021-04-08 05:34:29 - 2021-04-12 05:04:34

2459312.7322801 - 2459316.7115046

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
206268	2021-04-12 05:04:34	2459316.7115046	18.6701	0.0744755	20.798	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF
206267	2021-04-10 05:34:53	2459314.7325579	19.0219	0.0830335	20.6683	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF
206266	2021-04-08 05:34:29	2459312.7322801			20.441	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF

orange-ATLAS

ATLAS-MLO_ATLAS-01

2021-04-17 07:58:05 - 2021-04-17 07:58:05

2459321.832 - 2459321.832

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
207754	2021-04-17 07:58:05	2459321.832	19.464	0.162	19.79	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

cyan-ATLAS

ATLAS-MLO_ATLAS-01

2021-04-16 08:21:07 - 2021-04-16 08:21:07

2459320.848 - 2459320.848

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
207753	2021-04-16 08:21:07	2459320.848			19.47	ABMag	cyan-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot	[Last non detection]

r-P1

PS1_GPC1

2021-04-09 08:39:50 - 2021-04-09 08:39:50

2459313.861 - 2459313.861

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
205516	2021-04-09 08:39:50	2459313.861	19.97	0.1	20.6	ABMag	r-P1	PS1_GPC1	27	Robot

w-P1

PS1_GPC1

2021-04-13 06:02:53 - 2021-04-13 06:02:53

2459317.752 - 2459317.752

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
206859	2021-04-13 06:02:53	2459317.752	18.83	0.02	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	AT Type	Host name	Internal name	Assoc. Groups	Remarks	ADS Bibcode	Unreal
111046	2021-05-28 09:06:22	PS2_Bot1	K. C. Chambers,T. de Boer,J. Bulger et al.	Pan-STARRS	Pan-STARRS	10:18:44.410	+00:03:19.43	2021-04-13 06:08:38.400	18.61	w-P1	PSN		PS21dau	Pan-STARRS			N
107193	2021-04-18 10:44:36	ATLAS_Bot1	J. Tonry,L. Denneau,A. Heinze et al.	ATLAS	ATLAS	10:18:44.395	+00:03:19.21	2021-04-17 07:58:04.800	19.464	orange-ATLAS	PSN		ATLAS21myw	ATLAS			N
106792	2021-04-14 10:24:11	PS1_Bot1	K. C. Chambers,T. de Boer,J. Bulger et al.	Pan-STARRS	Pan-STARRS	10:18:44.408	+00:03:19.40	2021-04-13 06:02:52.800	18.83	w-P1	PSN		PS21dau	Pan-STARRS			N
106471	2021-04-12 18:42:39	ALeRCE	A. Munoz-Arancibia,F. Forster,F.E. Bauer et al.	ALeRCE	ZTF	10:18:44.414	+00:03:19.44	2021-04-10 05:34:53.003	19.0219	g-ZTF	PSN	WISEA J101844.29+000315.4	ZTF21aatwkkt	ZTF	Early SN candidate (g-rise > 0.71+-0.04 mag/day) classified using ALeRCE's stamp classifier - see http://arxiv.org/abs/2008.03309 - and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF21aatwkkt		N
106107	2021-04-10 18:21:52	YSE_Bot1	D. O. Jones (UC Santa Cruz),K. D. French (Carnegie,Illinois) et al.	YSE	Pan-STARRS	10:18:44.414	+00:03:19.37	2021-04-09 08:39:50.400	19.97	r-P1	PSN		PS21dau	Pan-STARRS		2021TNSTR1145....1J	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

9641

2021-05-13 22:55:49

UCSCTr_Bot1

M. R. Siebert, S. Tinyanont, K. Taggart, R. J. Foley (UCSC)

UCSC

SN Ibn

0.0712

UCSC

Previously classified by YSE as a SN with a blue continuum and flash ionization signatures (2021TNSCR1206....1A). Our new spectrum reveals that this is a SN Ibn. We measure the He 5876 line with a FWHM of 1900 km/s. ATel: 14624

2021TNSCR1615....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
9651	2021-05-12 00:00:00	Keck1 / LRIS		M. Siebert, S. Tinyanont	M. Siebert	UCSC	tns_2021iyt_2021-05-12_00-00-00_Keck1_LRIS_UCSC.flm		Object

9381

2021-04-14 18:15:46

Charlotte Angus

YSE

0.0712

YSE

Spectrum taken with ALFOSC/NOT in gr4 on 10/04/2021. Signatures of flash ionisation are seen within the spectrum (a blue continuum with strong He II and C III emission features and some weak Balmer lines). The rapid rise of the light curve in both YZE and ZTF imaging suggests that the transient was very young at the time of observation.

2021TNSCR1206....1A

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
9391	2021-04-10 00:00:00	NOT / ALFOSC		C Angus		YSE	tns_2021iyt_2021-04-10_NOT_ALFOSC_YSE.csv		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 111046 of Group Pan-STARRS1
Previous RA, DEC: 10:18:44.408, +00:03:19.40 (154.685031498, +0.0553900634367)
Updated RA, DEC: 10:18:44.410, +00:03:19.43 (154.685042503, 0.055396560455)

Object coordinates updated

Object coordinates updated according to AT-report 106792 of Group Pan-STARRS1
Previous RA, DEC: 10:18:44.414, +00:03:19.37 (154.685059983, +0.0553795786138)
Updated RA, DEC: 10:18:44.408, +00:03:19.40 (154.685031498, 0.0553900634367)

SN 2021iyt

Spectra

Light curves

Comments

Object coordinates updated

Object coordinates updated