RA/DEC (2000)
18:55:34.321 -53:43:22.76
283.893006 -53.722989
Type
SN II
Redshift
0.0086
Discovery ReportClassification Report
Related AstroNotes: 2025-241
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-02 22:07:39.072
TNS AT
Y
Public
Y
Discovery Mag
16.044
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_2025tam - 2025-08-05 01:38:53 SOAR / Goodman (None)z=
 ▌SN_2025tam - 2025-08-04 17:40:54 SALT / RSS (DLT40)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
 ▌ATLAS-STH_ATLAS-03_orange
 ▌Other_Other_Other
   
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
21703 2025-08-05 01:38:53 SOAR / Goodman R. Cartier/SOAR op R. Cartier None tns_2025tam_2025-08-05_01-38-53_SOAR_Goodman_None.txt Object
21704 2025-08-04 17:40:54 SALT / RSS 1200 L. Townsend S. W. Jha DLT40 tns_2025tam_2460892.2367419_SALT_RSS_DLT40.dat Object SN II showing broad lines of H-alpha, H-beta, and He I. H-alpha expansion velocity (peak to trough) of approximately 11,000 km/s.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-07-21 11:37:43 - 2025-08-23 11:28:11 2460877.984519 - 2460910.977907 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
511749 2025-08-23 11:28:11 2460910.977907 15.94 0.01 ABMag L-GOTO GOTO-S_GOTO-4 180
511748 2025-07-21 11:37:43 2460877.984519 19.9 ABMag L-GOTO GOTO-S_GOTO-4 360 [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-07-26 00:08:57 - 2025-08-02 22:07:39 2460882.50622 - 2460890.42198 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507093 2025-08-02 22:07:39 2460890.42198 16.044 0.126 16.71 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot
507092 2025-07-26 00:08:57 2460882.50622 19.5 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
Other- Other_Other 2025-07-17 02:26:58 - 2025-10-03 00:40:24 2460873.60206 - 2460951.52805 9
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522171 2025-10-03 00:40:24 2460951.52805 15.6 19.3 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
522170 2025-10-03 00:39:04 2460951.52713 15.6 19.4 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
516206 2025-09-09 01:46:04 2460927.57366 15.3 19.3 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
516205 2025-09-09 00:32:56 2460927.52287 15.3 19.4 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
516738 2025-09-08 01:13:12 2460926.55083 15.6 19.1 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
516737 2025-09-08 00:39:44 2460926.52759 15.6 17.5 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
516204 2025-07-17 02:26:58 2460873.60206 20.4 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
516736 2025-07-17 02:26:58 2460873.60206 20.4 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
522169 2025-07-17 02:26:58 2460873.60206 20.4 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
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
272455 2025-10-03 19:35:21 MASTER M.Shilova,V.Lipunov,E.Gorbovskoy et al. MASTER MASTER 18:55:34.420 -53:43:22.80 2025-10-03 00:39:04.032 15.6 Other- PSN MASTER OT J185534.42-534322.8 MASTER unfiltered N
269860 2025-09-13 23:33:03 MASTER Ya.Kechin,M.Shilova,V.Shumkov et al. MASTER MASTER 18:55:34.380 -53:43:22.50 2025-09-08 00:39:43.776 15.6 Other- PSN MASTER OT J185534.38-534322.5 MASTER unfiltered N
269575 2025-09-09 10:29:32 MASTER M.Shilova,V.Lipunov,E.Gorbovskoy et al. MASTER MASTER 18:55:34.290 -53:43:22.80 2025-09-09 00:32:55.968 15.3 Other- PSN MASTER OT J185534.29-534322.8 MASTER N
267353 2025-08-23 15:53:13 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 18:55:34.325 -53:43:22.66 2025-08-23 11:28:11.424 15.94 L-GOTO Other GOTO25gev GOTO N
264806 2025-08-03 00:53:19 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 18:55:34.321 -53:43:22.76 2025-08-02 22:07:39.072 16.044 orange-ATLAS PSN ATLAS25iym ATLAS 2025TNSTR3049....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
21704 2025-08-05 02:35:33 Saurabh W. Jha Saurabh W. Jha (Rutgers) J. Andrews, D. J. Sand, K. A. Bostroem, S. Valenti, M. Lundquist, E. Hoang, M. Shrestha, Y. Dong, D. Janzen, G. Hosseinzadeh, J. Pearson, N. Meza, D. Metha, A. Ravi, A. Martas, B. Subrayan DLT40 SN II 0.0086 1 DLT40 2025TNSCR3088....1J
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
21704 2025-08-04 17:40:54 SALT / RSS 1200 L. Townsend S. W. Jha DLT40 tns_2025tam_2460892.2367419_SALT_RSS_DLT40.dat Object SN II showing broad lines of H-alpha, H-beta, and He I. H-alpha expansion velocity (peak to trough) of approximately 11,000 km/s.
21703 2025-08-05 02:21:01 Regis Cartier R. Cartier (CITEVA), J. L. Prieto, E. Hueichapan (UDP) None SN II 0.0086 1 Young type II SN. Redshift estimated from host galaxy narrow emission lines. 2025TNSCR3089....1C
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
21703 2025-08-05 01:38:53 SOAR / Goodman R. Cartier/SOAR op R. Cartier None tns_2025tam_2025-08-05_01-38-53_SOAR_Goodman_None.txt Object

Comments