RA/DEC (2000)
20:45:55.565 -51:23:27.65
311.481521667 -51.3910133333
Type
SN Ia
Redshift
0.01525
Discovery ReportClassification Report
Related AstroNotes: 2025-234
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-07-26 00:13:32.160
TNS AT
Y
Public
Y
Discovery Mag
19.005
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_2025siq - 2025-08-05 12:00:00 ANU-2.3m / WiFeS (DEBASS)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
 ▌ATLAS-STH_ATLAS-03_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
21712 2025-08-05 12:00:00 ANU-2.3m / WiFeS 1200 Robotic B. Martin DEBASS tns_2025siq_2025-08-05.5_ANU-2.3m_WiFeS_DEBASS.dat tns_2025siq_2025-08-05.5_ANU-2.3m_WiFeS_DEBASS.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-08-12 09:45:33 - 2025-08-12 09:45:33 2460899.906634 - 2460899.906634 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508273 2025-08-12 09:45:33 2460899.906634 16.22 0.01 ABMag L-GOTO GOTO-S_GOTO-4 180
L-GOTO GOTO-S_GOTO-3 2025-07-16 13:20:52 - 2025-07-16 13:20:52 2460873.056165 - 2460873.056165 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508272 2025-07-16 13:20:52 2460873.056165 19.8 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-07-24 08:12:07 - 2025-07-24 08:12:07 2460880.84175 - 2460880.84175 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
505390 2025-07-24 08:12:07 2460880.84175 18.85 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-07-26 00:13:32 - 2025-07-26 00:13:32 2460882.5094 - 2460882.5094 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
505391 2025-07-26 00:13:32 2460882.5094 19.005 0.159 19.59 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 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
265566 2025-08-12 13:54:45 GOTO_bot A. Kumar, T. Killestein, L. Kelsey et al. GOTO GOTO 20:45:55.527 -51:23:27.25 2025-08-12 09:45:32.832 16.22 L-GOTO Other GOTO25fso GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. The candidate was flagged by volunteers: Sauro Gaudenzi, M.T. Mazzucato, Pietro Maiorana, Antonio Pasqua, Mayahuel Torres Guerrero N
263957 2025-07-27 08:41:47 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 20:45:55.565 -51:23:27.65 2025-07-26 00:13:32.160 19.005 orange-ATLAS PSN ATLAS25ihm ATLAS 2025TNSTR2937....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
21712 2025-08-08 04:46:33 Bailey Martin B. Martin (ANU), K. Auchettl (University of Melbourne/UCSC), B. P. Schmidt (ANU), P. Armstrong (ANU), D. Cao (ANU), H. Kummar (ANU), C. Lidman (ANU), L. Rauf (ANU), J. Shi (University of Melbourne), and B. E. Tucker (ANU) DEBASS SN Ia 0.01525 1 1 DEBASS Classified with superfit. The best fitting spectrum is SN1981B, a Type Ia. 2025TNSCR3117....1M
Related files
File Comments Last Modified (UT) Modified By
tns_2025siq_atrep_21712_DEBASS.pdf The best fitting spectrum from superfit. 2025-08-08 04:46:34 Bailey Martin
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
21712 2025-08-05 12:00:00 ANU-2.3m / WiFeS 1200 Robotic B. Martin DEBASS tns_2025siq_2025-08-05.5_ANU-2.3m_WiFeS_DEBASS.dat tns_2025siq_2025-08-05.5_ANU-2.3m_WiFeS_DEBASS.fits Object

Comments