2026rcy | Transient Name Server

RA/DEC (2000)

21:42:45.018 -17:41:11.12

325.68757576066 -17.686421898962

Type

SLSN-I

Redshift

0.71

Discovery Report Classification Report

Related AstroNotes: 2026-215

Reporting Group

ANTARES

Discovering Data Source

Rubin

Discovery Date

2026-06-26 09:19:37.000

TNS AT

Public

Discovery Mag

21.8

Filter

z-LSST

Reporter/s

A. Chalagulla (UCSC), M. Soraisam (NOIRLab)

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

Rubin_LSSTCam_z

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
	24263	2026-07-11 14:13:50	Keck1 / LRIS		Sam Whitebook, Andrei-Alexandru Cristea, Tom Prince	Maggie Li	None	tns_2026rcy_2026-07-11_14-13-50_Keck1_LRIS_None.spec		Object			Keck/LRIS
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 z-step: v-step: Remarks Keck/LRIS

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

z-LSST

Rubin_LSSTCam

2026-06-26 09:19:37 - 2026-06-26 09:19:37

2461217.8886227 - 2461217.8886227

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
597035	2026-06-26 09:19:37	2461217.8886227	21.8	0.049		ABMag	z-LSST	Rubin_LSSTCam

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
311475	2026-07-01 06:08:14	GOATS_bot	A. Chalagulla (UCSC), M. Soraisam (NOIRLab)	ANTARES	Rubin	21:42:45.018	-17:41:11.12	2026-06-26 09:19:37.000	21.8	z-LSST		PSN		LSST-AP-DO-170587110502301802	Rubin			2026TNSTR2757....1C	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

24257

2026-07-14 00:57:25

Maggie Li

Maggie Li, Lin Yan (Caltech)

None

SLSN-I

0.71

Classification as a SLSN-I based on template matching to NGSF; redshift is approximate.

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
24263	2026-07-11 14:13:50	Keck1 / LRIS		Sam Whitebook, Andrei-Alexandru Cristea, Tom Prince	Maggie Li	None	tns_2026rcy_2026-07-11_14-13-50_Keck1_LRIS_None.spec		Object			Keck/LRIS

SN 2026rcy

Spectra

Light curves

Comments