RA/DEC (2000)
16:23:21.171 +08:55:15.20
245.838212 +8.920889
Type
SN Ia
Redshift
0.049
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-09 07:32:51.072
TNS AT
Y
Public
Y
Discovery Mag
17.986
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025tlc - 2025-08-16 00:00:00 LT / SPRAT (ATLAS)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-N_GOTO-2_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌GOTO-N_GOTO-1_L
 ▌BG4_BlackGEM-Cam4_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
21971 2025-08-16 00:00:00 LT / SPRAT C. Angus ATLAS tns_2025tlc_2025-08-16_LT_SPRAT_ATLAS.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-08-13 21:48:37 - 2025-08-13 21:48:37 2460901.408758 - 2460901.408758 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508609 2025-08-13 21:48:37 2460901.408758 17.89 0.08 ABMag L-GOTO GOTO-N_GOTO-2 180
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-08-08 03:57:30 - 2025-08-08 03:57:30 2460895.66493 - 2460895.66493 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507941 2025-08-08 03:57:30 2460895.66493 17.8 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-07-30 22:39:13 - 2025-07-30 22:39:13 2460887.443895 - 2460887.443895 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508608 2025-07-30 22:39:13 2460887.443895 20.1 ABMag L-GOTO GOTO-N_GOTO-1 360 [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-08-11 23:48:36 - 2025-08-11 23:48:36 2460899.4920833 - 2460899.4920833 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508161 2025-08-11 23:48:36 2460899.4920833 17.88 0.04 21.25 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
BG-q-BlackGem BG2_BlackGEM-Cam2 2025-07-22 01:39:07 - 2025-07-22 01:39:07 2460878.568831 - 2460878.568831 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508160 2025-07-22 01:39:07 2460878.568831 20.74 ABMag BG-q-BlackGem BG2_BlackGEM-Cam2 60 robotic [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-08-09 07:32:51 - 2025-08-09 07:32:51 2460896.81448 - 2460896.81448 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507942 2025-08-09 07:32:51 2460896.81448 17.986 0.124 18.51 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
265736 2025-08-14 06:19:26 GOTO_bot D. O'Neill,G. Ramsay,K. Ackley et al. GOTO GOTO 16:23:21.189 +08:55:15.34 2025-08-13 21:48:36.864 17.89 L-GOTO Other GOTO25fty GOTO N
265498 2025-08-12 07:05:02 BlackGEM_Bot1 G. Ramsay,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 16:23:21.171 +08:55:15.20 2025-08-11 23:48:36.000 17.88 BG-q-BlackGem PSN BGEM J162321.17+085515.2 BlackGEM N
265334 2025-08-09 22:18:11 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 16:23:21.169 +08:55:14.79 2025-08-09 07:32:51.072 17.986 orange-ATLAS PSN ATLAS25jey ATLAS 2025TNSTR3122....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21971 2025-09-05 11:46:33 Charlotte Angus C. Angus ATLAS SN Ia 0.049 1 ATLAS Spectrum taken with LT/SPRAT on 2025/08/16. Template matches to SNe Ia around max. Redshift taken from host galaxy redshift in NED. Classification performed using SNID. 2025TNSCR3583....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
21971 2025-08-16 00:00:00 LT / SPRAT C. Angus ATLAS tns_2025tlc_2025-08-16_LT_SPRAT_ATLAS.dat Object

Comments

TNS
System

Tue, 08/12/2025 - 07:05

Object coordinates updated

Object coordinates updated according to AT-report 265498 of Group BlackGEM
Previous RA, DEC: 16:23:21.169, +08:55:14.79 (245.838205455, +8.92077363636)
Updated RA, DEC: 16:23:21.171, +08:55:15.20 (245.838212, +8.920889)