RA/DEC (2000)
04:35:28.553 -57:28:32.42
68.868971 -57.475672
Type
SN Ia
Redshift
0.146
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-11-12 16:17:55.968
TNS AT
Y
Public
Y
Discovery Mag
20
Filter
L-GOTO
Reporter/s
B. Godson, G. Ramsay, 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, T. Killestein, A. Kumar, D. O'Neill, M. Pursiainen, on behalf of GOTO collaboration

Spectra

 SN_2025adcy - 2025-09-14 00:00:00 SALT / RSS (GW-MMADS)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-4_L
 BG3_BlackGEM-Cam3_BG-q
 ML1_MeerLICHT-Cam_BG-q
   
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
22412 2025-09-14 00:00:00 SALT / RSS SALT Observer Tomas Cabrera GW-MMADS tns_2025adcy_2025-09-14_SALT_RSS_GW-MMADS.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-11-08 12:46:56 - 2025-11-12 16:17:56 2460988.03259 - 2460992.179119 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
530651 2025-11-12 16:17:56 2460992.179119 20 0.19 ABMag L-GOTO GOTO-S_GOTO-4 240
530650 2025-11-08 12:46:56 2460988.03259 18.5 ABMag L-GOTO GOTO-S_GOTO-4 90 [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-11-16 05:19:23 - 2025-11-16 05:19:23 2460995.721794 - 2460995.721794 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531416 2025-11-16 05:19:23 2460995.721794 19.48 0.13 20.89 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
BG-q-BlackGem ML1_MeerLICHT-Cam 2020-03-23 13:39:00 - 2020-03-23 13:39:00 2458932.06875 - 2458932.06875 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531415 2020-03-23 13:39:00 2458932.06875 20.4 ABMag BG-q-BlackGem ML1_MeerLICHT-Cam 60 robotic [Last non detection]
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
277035 2025-11-16 08:38:02 BlackGEM_Bot1 P. Groot, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 04:35:28.553 -57:28:32.42 2025-11-16 05:19:23.000 19.48 BG-q-BlackGem PSN BGEM J043528.55-572832.4 BlackGEM N
276501 2025-11-12 17:49:23 GOTO_bot B. Godson, G. Ramsay, K. Ackley et al. GOTO GOTO 04:35:28.558 -57:28:31.64 2025-11-12 16:17:55.968 20 L-GOTO Other GOTO25jye GOTO 2025TNSTR4538....1G N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22411 2025-11-14 20:20:14 Xander Hall Xander J. Hall (CMU), Tomás Cabrera (CMU), Lei Hu (CMU), Antonella Palmese (CMU), Igor Andreoni (UNC), Keerthi Kunnumkai (CMU), Brendan O’Connor (CMU), on behalf of the Gravitational Wave MultiMessenger Astronomy DECam Survey (GW-MMADS) team GW-MMADS SN Ia 0.146 1 GW-MMADS NGSF best match is to Ia-norm 2017erp. 2025TNSCR4585....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
22412 2025-09-14 00:00:00 SALT / RSS SALT Observer Tomas Cabrera GW-MMADS tns_2025adcy_2025-09-14_SALT_RSS_GW-MMADS.txt Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 277035 of Group BlackGEM
Previous RA, DEC: 04:35:28.558, -57:28:31.64 (68.868992, -57.475455)
Updated RA, DEC: 04:35:28.553, -57:28:32.42 (68.868971, -57.475672)