RA/DEC (2000)
01:11:27.200 -38:04:53.29
17.8633349217 -38.0814700482
Type
SN II
Redshift
0.01
Discovery ReportClassification Report
Related AstroNotes: 2025-233
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-07-24 07:13:35.040
TNS AT
Y
Public
Y
Discovery Mag
16.924
Filter
cyan-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_2025scw - 2025-07-31 13:18:55 FTN / FLOYDS-N (Global SN Project)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
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌PS1_GPC1_w
   
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
21674 2025-07-31 13:18:55 FTN / FLOYDS-N 3600 LCO/GSP Joseph Farah Global SN Project tns_2025scw_2025-07-31_13-18-55_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2025scw_2025-07-31_13-18-55_FTN_FLOYDS-N_Global_SN_Project.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-08-04 15:58:47 - 2025-08-04 15:58:47 2460892.165818 - 2460892.165818 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507412 2025-08-04 15:58:47 2460892.165818 17.04 0.02 ABMag L-GOTO GOTO-S_GOTO-4 360
L-GOTO GOTO-S_GOTO-3 2025-07-16 16:43:32 - 2025-07-16 16:43:32 2460873.196902 - 2460873.196902 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507411 2025-07-16 16:43:32 2460873.196902 19.7 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-07-21 08:21:56 - 2025-07-24 07:13:35 2460877.84856 - 2460880.8011 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
504878 2025-07-24 07:13:35 2460880.8011 16.924 0.045 18.96 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
504877 2025-07-21 08:21:56 2460877.84856 15.28 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
w-P1 PS1_GPC1 2025-09-17 12:05:02 - 2025-09-17 12:05:02 2460936.0035 - 2460936.0035 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
518926 2025-09-17 12:05:02 2460936.0035 17.23 0.01 22 ABMag w-P1 PS1_GPC1 45 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
270855 2025-09-21 10:42:07 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 01:11:27.200 -38:04:53.29 2025-09-17 12:05:02.400 17.23 w-P1 PSN PS25hop Pan-STARRS N
265010 2025-08-04 18:37:22 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 01:11:27.194 -38:04:53.31 2025-08-04 15:58:46.848 17.04 L-GOTO Other GOTO25fqb GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. The candidate was flagged by volunteers: M.T. Mazzucato, Henryk Krawczyk, Antonio Pasqua, Elanos Luís Amado Gonzalez, Cledison Marcos da Silva N
263704 2025-07-25 13:44:23 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 01:11:27.178 -38:04:53.18 2025-07-24 07:13:35.040 16.924 cyan-ATLAS PSN ATLAS25igr ATLAS 2025TNSTR2886....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
21674 2025-07-31 21:23:03 Joseph Farah Joseph Farah (UCSB/LCO), Moira Andrews, Kathryn Wynn, D. Andrew Howell, Curtis McCully Global SN Project SN II 0.01 1 Global SN Project We report the classification of SN 2025scw as SN II. The spectrum shows a best match to SN II at approximately peak using SNID (Blondin & Tonry 2007, ApJ, 666, 1024). There is a clear and prominent Hydrogen-alpha feature. SNID finds a best-fit redshift of z~0.009, consistent with the nearby host galaxy of NGC 0424 (z = 0.011, d = 47.8 Mpc; value from NED). Additional follow-up is encouraged. 2025TNSCR3013....1F
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
21674 2025-07-31 13:18:55 FTN / FLOYDS-N 3600 LCO/GSP Joseph Farah Global SN Project tns_2025scw_2025-07-31_13-18-55_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2025scw_2025-07-31_13-18-55_FTN_FLOYDS-N_Global_SN_Project.fits Object

Comments

TNS
System

Sun, 09/21/2025 - 10:42

Object coordinates updated

Object coordinates updated according to AT-report 270855 of Group Pan-STARRS
Previous RA, DEC: 01:11:27.178, -38:04:53.18 (17.86324125, -38.08143875)
Updated RA, DEC: 01:11:27.200, -38:04:53.29 (17.8633349217, -38.0814700482)