RA/DEC (2000)
14:27:59.667 +05:38:49.76
216.998611668 +5.64715524611
Type
SN II
Redshift
0.05
Discovery ReportClassification Report
Related AstroNotes: 2025-176
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-05-23 11:22:48.288
TNS AT
Y
Public
Y
Discovery Mag
19.4
Filter
L-GOTO
Reporter/s
G. Ramsay, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025lsf - 2025-06-01 23:25:37 NOT / ALFOSC (BlackGEM)z=
 ▌SN_2025lsf - 2025-06-01 23:25:37 NOT / ALFOSC (BlackGEM)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
▌Show C III at z=vexp= km/s
▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V at z=vexp= km/s
▌Show O at z=vexp= km/s
▌Show [O I] at z=vexp= km/s
▌Show O II at z=vexp= km/s
▌Show [O II] at z=vexp= km/s
▌Show [O III] at z=vexp= km/s
▌Show O V at z=vexp= km/s
▌Show O VI at z=vexp= km/s
▌Show Na at z=vexp= km/s
▌Show Mg at z=vexp= km/s
▌Show Mg II at z=vexp= km/s
▌Show Si II at z=vexp= km/s
▌Show S II at z=vexp= km/s
▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
▌Show Fe II at z=vexp= km/s
▌Show Fe III at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Tellurics 
▌Show Galaxy lines at z=
▌Show WR-WN at z=vexp= km/s
▌Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌GOTO-S_GOTO-3_L
 ▌PS2_GPC2_w
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌GOTO-N_GOTO-1_L
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌PS1_GPC1_i
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
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
21276 2025-06-01 23:25:37 NOT / ALFOSC 1200 Gerard Garcia-Moreno, Mathias Gort Gerard Garcia-Moreno BlackGEM tns_2025lsf_2460828.4761212617_NOT_ALFOSC_BlackGEM.txt tns_2025lsf_2460828.4761212617_NOT_ALFOSC_BlackGEM.fits Object
21248 2025-06-01 23:25:37 NOT / ALFOSC 1200 Gerard Garcia-Moreno, Mathias Gort Gerard Garcia-Moreno BlackGEM tns_2025lsf_2460828.476121261_NOT_ALFOSC_BlackGEM.txt tns_2025lsf_2460828.476121261_NOT_ALFOSC_BlackGEM.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2025-05-23 11:22:48 - 2025-05-23 11:22:48 2460818.974172 - 2460818.974172 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490909 2025-05-23 11:22:48 2460818.974172 19.4 0.14 ABMag L-GOTO GOTO-S_GOTO-3 180
w-P1 PS2_GPC2 2025-05-28 06:39:51 - 2025-05-28 06:39:51 2460823.77767 - 2460823.77767 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
494826 2025-05-28 06:39:51 2460823.77767 18.83 0.04 22 ABMag w-P1 PS2_GPC2 45 Robot
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-05-24 03:21:42 - 2025-05-24 03:21:42 2460819.64007 - 2460819.64007 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491206 2025-05-24 03:21:42 2460819.64007 18.606 0.159 19.39 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
L-GOTO GOTO-N_GOTO-1 2025-05-21 23:23:00 - 2025-05-21 23:23:00 2460817.474303 - 2460817.474303 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490908 2025-05-21 23:23:00 2460817.474303 19.7 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-05-27 01:51:37 - 2025-05-27 01:51:37 2460822.5775116 - 2460822.5775116 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491770 2025-05-27 01:51:37 2460822.5775116 18.82 0.08 20.27 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-05-13 02:28:11 - 2025-05-13 02:28:11 2460808.6029051 - 2460808.6029051 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491769 2025-05-13 02:28:11 2460808.6029051 19.24 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
r-ZTF P48_ZTF-Cam 2025-05-22 05:39:18 - 2025-05-25 09:51:31 2460817.735625 - 2460820.9107755 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491406 2025-05-25 09:51:31 2460820.9107755 19.2721 0.129077 ABMag r-ZTF P48_ZTF-Cam
491404 2025-05-22 05:39:18 2460817.735625 20.6641 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-05-22 07:48:05 - 2025-05-22 07:48:05 2460817.8250579 - 2460817.8250579 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491405 2025-05-22 07:48:05 2460817.8250579 19.7007 0.142489 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-05-23 09:56:19 - 2025-05-23 09:56:19 2460818.91411 - 2460818.91411 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491205 2025-05-23 09:56:19 2460818.91411 19.6 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
i-P1 PS1_GPC1 2025-05-25 09:46:48 - 2025-05-25 09:46:48 2460820.9075 - 2460820.9075 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491524 2025-05-25 09:46:48 2460820.9075 19.53 0.11 20.7 ABMag i-P1 PS1_GPC1 27 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
258369 2025-06-13 10:48:03 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 14:27:59.667 +05:38:49.76 2025-05-28 06:39:50.688 18.83 w-P1 PSN PS25cwf Pan-STARRS N
256864 2025-05-27 06:17:09 BlackGEM_Bot1 P. Groot,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 14:27:59.684 +05:38:49.62 2025-05-27 01:51:37.000 18.82 BG-q-BlackGem 1 PSN BGEM J142759.68+053849.6 BlackGEM N
Related files
File Comments Last Modified (UT) Modified By
tns_2025lsf_atrep_256864_BlackGEM.pdf Finding Chart 2025-05-27 06:17:11 BlackGEM_Bot1
256727 2025-05-25 20:26:52 YSE_Bot1 D. O. Jones (UC Santa Cruz),K. D. French (Carnegie,Illinois) et al. YSE Pan-STARRS 14:27:59.673 +05:38:49.74 2025-05-25 09:46:48.000 19.53 i-P1 PSN PS25cwf Pan-STARRS N
256683 2025-05-25 19:21:04 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 14:27:59.693 +05:38:49.93 2025-05-22 07:48:05.002 19.7007 g-ZTF PSN ZTF25aarefui ZTF N
256579 2025-05-25 05:57:45 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 14:27:59.688 +05:38:49.53 2025-05-24 03:21:42.048 18.606 cyan-ATLAS PSN ATLAS25fjx ATLAS N
256389 2025-05-24 12:30:38 GOTO_bot G. Ramsay,D. O'Neill,K. Ackley et al. GOTO GOTO 14:27:59.648 +05:38:50.07 2025-05-23 11:22:48.288 19.4 L-GOTO Other GOTO25dad GOTO 2025TNSTR1940....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21276 2025-06-09 21:29:03 Nadejda Blagorodnova Mujortova Nadejda Blagorodnova Mujortova BlackGEM SN II 0.05 1 Add BlackGEM, CET-3PO Likely a young SN type II. The Balmer lines are broad and emerging. Initially it was confused with a CV, but the host is a faint galaxy and the broad lines are indicative of a hydrogen-rich SN. 2025TNSCR2161....1M
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
21276 2025-06-01 23:25:37 NOT / ALFOSC 1200 Gerard Garcia-Moreno, Mathias Gort Gerard Garcia-Moreno BlackGEM tns_2025lsf_2460828.4761212617_NOT_ALFOSC_BlackGEM.txt tns_2025lsf_2460828.4761212617_NOT_ALFOSC_BlackGEM.fits Object
21248 2025-06-06 22:30:37 Nadejda Blagorodnova Mujortova Nadejda Blagorodnova Mujortova BlackGEM CV 0 1 Add BlackGEM, CET-3PO 2025TNSCR2126....1M
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
21248 2025-06-01 23:25:37 NOT / ALFOSC 1200 Gerard Garcia-Moreno, Mathias Gort Gerard Garcia-Moreno BlackGEM tns_2025lsf_2460828.476121261_NOT_ALFOSC_BlackGEM.txt tns_2025lsf_2460828.476121261_NOT_ALFOSC_BlackGEM.fits Object

Comments

TNS
System

Fri, 06/13/2025 - 10:48

Object coordinates updated

Object coordinates updated according to AT-report 258369 of Group Pan-STARRS
Previous RA, DEC: 14:27:59.673, +05:38:49.74 (216.998638931, +5.64714902905)
Updated RA, DEC: 14:27:59.667, +05:38:49.76 (216.998611668, +5.64715524611)

TNS
System

Sun, 05/25/2025 - 20:26

Object coordinates updated

Object coordinates updated according to AT-report 256727 of Group Pan-STARRS
Previous RA, DEC: 14:27:59.693, +05:38:49.93 (216.9987222, +5.6472037)
Updated RA, DEC: 14:27:59.673, +05:38:49.74 (216.998638931, +5.64714902905)

TNS
System

Sun, 05/25/2025 - 19:21

Object coordinates updated

Object coordinates updated according to AT-report 256683 of Group ZTF
Previous RA, DEC: 14:27:59.688, +05:38:49.53 (216.998701667, +5.64709166667)
Updated RA, DEC: 14:27:59.693, +05:38:49.93 (216.9987222, +5.6472037)

TNS
System

Sun, 05/25/2025 - 05:57

Object coordinates updated

Object coordinates updated according to AT-report 256579 of Group ATLAS
Previous RA, DEC: 14:27:59.648, +05:38:50.07 (216.998535, +5.647242)
Updated RA, DEC: 14:27:59.688, +05:38:49.53 (216.998701667, +5.64709166667)