RA/DEC (2000)
04:21:40.657 -53:21:39.13
65.419405 -53.36086875
Type
SN Ia
Redshift
0.0424
Discovery ReportClassification Report
Related AstroNotes: 2025-215
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-07-04 10:04:26.400
TNS AT
Y
Public
Y
Discovery Mag
17.801
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), 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_2025qha - 2025-07-16 09:37:10 ESO-NTT / EFOSC2-NTT (ePESSTO+)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-3_L
 ▌ATLAS-CHL_ATLAS-04_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
21541 2025-07-16 09:37:10 ESO-NTT / EFOSC2-NTT 300 J. Quirola-Vasquez, J. Sanchez-Sierras U. Burgaz, J.H. Terwel ePESSTO+ tns_2025qha_2025-07-16_09-37-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025qha_2025-07-16_09-37-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2025-04-07 10:00:50 - 2025-07-08 19:04:45 2460772.91725 - 2460865.294973 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
501516 2025-07-08 19:04:45 2460865.294973 17.37 0.09 ABMag L-GOTO GOTO-S_GOTO-3 180
501515 2025-04-07 10:00:50 2460772.91725 18.3 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-06-30 09:39:35 - 2025-07-04 10:04:26 2460856.90249 - 2460860.91975 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
500823 2025-07-04 10:04:26 2460860.91975 17.801 0.122 18.75 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
500822 2025-06-30 09:39:35 2460856.90249 18.85 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [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
261883 2025-07-09 09:25:07 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 04:21:40.620 -53:21:38.96 2025-07-08 19:04:45.408 17.37 L-GOTO Other GOTO25erg 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, Pietro Maiorana, Ayushmaan Mishra, Antonio Pasqua N
261514 2025-07-04 13:29:17 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 04:21:40.657 -53:21:39.13 2025-07-04 10:04:26.400 17.801 orange-ATLAS PSN ATLAS25gzg ATLAS 2025TNSTR2553....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
21541 2025-07-17 07:33:51 ePESSTOplus_Bot1 J. Quirola-Vasquez, J. Sanchez-Sierras, U. Burgaz, J.H. Terwel, A. Horowicz on behalf of ePESSTO+ ePESSTO+ SN Ia 0.0424 1 ePESSTO+ 2025TNSCR2747....1Q
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
21541 2025-07-16 09:37:10 ESO-NTT / EFOSC2-NTT 300 J. Quirola-Vasquez, J. Sanchez-Sierras U. Burgaz, J.H. Terwel ePESSTO+ tns_2025qha_2025-07-16_09-37-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025qha_2025-07-16_09-37-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments