RA/DEC (2000)
16:00:38.334 +14:21:22.61
240.159724338 +14.3562801355
Type
SN II
Redshift
0.032
Discovery ReportClassification Report
Related AstroNotes: 2025-214, 2025-247
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-07-09 22:00:27.936
TNS AT
Y
Public
Y
Discovery Mag
17.8
Filter
L-GOTO
Reporter/s
D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, 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_2025qsn - 2025-08-07 23:32:40 ESO-NTT / EFOSC2-NTT (ePESSTO+)z=
 ▌SN_2025qsn - 2025-07-15 01:32:10 Magellan-Clay / LDSS-3 (None)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
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌PS2_GPC2_w
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌GOTO-N_GOTO-1_L
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌BG2_BlackGEM-Cam2_BG-q
 ▌ATLAS-HKO_ATLAS-02_orange
   
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
21727 2025-08-07 23:32:40 ESO-NTT / EFOSC2-NTT 1800 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025qsn_2025-08-07_23-32-40_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025qsn_2025-08-07_23-32-40_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
21535 2025-07-15 01:32:10 Magellan-Clay / LDSS-3 E. Hueichapan R. Cartier/J. L. Prieto None tns_2025qsn_2025-07-15_01-32-10_Magellan-Clay_LDSS-3_None.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
w-P1 PS2_GPC2 2025-07-25 08:48:42 - 2025-07-25 08:48:42 2460881.86715 - 2460881.86715 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
545916 2025-07-25 08:48:42 2460881.86715 17.98 0.02 22 ABMag w-P1 PS2_GPC2 45 Robot
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-07-07 02:52:47 - 2025-07-07 02:52:47 2460863.61999 - 2460863.61999 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502297 2025-07-07 02:52:47 2460863.61999 18.25 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-07-07 21:48:47 - 2025-07-09 22:00:28 2460864.408876 - 2460866.416989 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
501687 2025-07-09 22:00:28 2460866.416989 17.8 0.13 ABMag L-GOTO GOTO-N_GOTO-1 180
501686 2025-07-07 21:48:47 2460864.408876 18.5 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-06-24 03:08:22 - 2025-06-24 03:08:22 2460850.6308102 - 2460850.6308102 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
514918 2025-06-24 03:08:22 2460850.6308102 20.79 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
BG-q-BlackGem BG2_BlackGEM-Cam2 2025-08-11 23:34:18 - 2025-08-11 23:34:18 2460899.4821528 - 2460899.4821528 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
514919 2025-08-11 23:34:18 2460899.4821528 18.69 0.05 20.9 ABMag BG-q-BlackGem BG2_BlackGEM-Cam2 60 robotic
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-07-08 08:50:37 - 2025-07-08 08:50:37 2460864.86848 - 2460864.86848 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502298 2025-07-08 08:50:37 2460864.86848 18.441 0.161 18.62 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 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
284669 2025-12-31 00:40:12 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 16:00:38.334 +14:21:22.61 2025-07-25 08:48:41.760 17.98 w-P1 PSN PS25lil Pan-STARRS N
268943 2025-09-01 17:29:09 BlackGEM_Bot1 H. Tranin,F. Stoppa,D. Pieterse et al. BlackGEM BlackGEM 16:00:38.324 +14:21:22.95 2025-08-11 23:34:18.000 18.69 BG-q-BlackGem PSN BGEM J160038.32+142122.9 BlackGEM N
262384 2025-07-13 09:03:12 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 16:00:38.325 +14:21:22.43 2025-07-08 08:50:36.672 18.441 orange-ATLAS PSN ATLAS25hoh ATLAS N
261983 2025-07-10 06:19:43 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 16:00:38.365 +14:21:23.14 2025-07-09 22:00:27.936 17.8 L-GOTO Other GOTO25esf GOTO 2025TNSTR2638....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21727 2025-08-08 18:34:08 ePESSTOplus_Bot1 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani, Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter, Ofer Yaron on behalf of ePESSTO+ ePESSTO+ SN II 0.032 1 ePESSTO+ 2025TNSCR3118....1V
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
21727 2025-08-07 23:32:40 ESO-NTT / EFOSC2-NTT 1800 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025qsn_2025-08-07_23-32-40_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025qsn_2025-08-07_23-32-40_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
21535 2025-07-16 16:48:34 Regis Cartier E. Hueichapan (UDP), R. Cartier (CITEVA), J. L. Prieto (UDP) None SN 1 Young SN spectrum showing blue continuum and broad wiggles. No clear SN type and redshift. A narrow feature at 6784.3 A could be due to Halpha, thus the potential SN redshift is ~ 0.034. At this redshift the SN maximum absolute magnitude will be brighter than -18 mag. 2025TNSCR2735....1H
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
21535 2025-07-15 01:32:10 Magellan-Clay / LDSS-3 E. Hueichapan R. Cartier/J. L. Prieto None tns_2025qsn_2025-07-15_01-32-10_Magellan-Clay_LDSS-3_None.txt Object

Comments

TNS
System

Wed, 12/31/2025 - 00:40

Object coordinates updated

Object coordinates updated according to AT-report 284669 of Group Pan-STARRS
Previous RA, DEC: 16:00:38.324, +14:21:22.95 (240.159683, +14.356375)
Updated RA, DEC: 16:00:38.334, +14:21:22.61 (240.159724338, +14.3562801355)

TNS
System

Mon, 09/01/2025 - 17:29

Object coordinates updated

Object coordinates updated according to AT-report 268943 of Group BlackGEM
Previous RA, DEC: 16:00:38.325, +14:21:22.43 (240.159688333, +14.3562313333)
Updated RA, DEC: 16:00:38.324, +14:21:22.95 (240.159683, +14.356375)

TNS
System

Sun, 07/13/2025 - 09:03

Object coordinates updated

Object coordinates updated according to AT-report 262384 of Group ATLAS
Previous RA, DEC: 16:00:38.365, +14:21:23.14 (240.159855, +14.356429)
Updated RA, DEC: 16:00:38.325, +14:21:22.43 (240.159688333, +14.3562313333)