RA/DEC (2000)
15:37:37.287 -08:43:15.36
234.405364 -8.720934
Type
SN Ia
Redshift
0.02409
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-04-06 05:59:59.136
TNS AT
Y
Public
Y
Discovery Mag
18.05
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), 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_2025gxs - 2025-04-10 13:43:27 FTS / FLOYDS-S (None)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

 ▌LAST_LAST-Cam_Clear
 ▌GOTO-S_GOTO-4_L
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_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
20742 2025-04-10 13:43:27 FTS / FLOYDS-S 1800 Las Cumbres Observatory Megan Newsome None tns_2025gxs_2025-04-10_13-43-27_FTS_FLOYDS-S_None.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2024-03-09 02:26:21 - 2025-04-29 20:15:22 2460378.60163 - 2460795.34401 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
484796 2025-04-29 20:15:22 2460795.34401 16.74 ABMag Clear- LAST_LAST-Cam 400
484795 2024-03-09 02:26:21 2460378.60163 20.62 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
L-GOTO GOTO-S_GOTO-4 2025-04-03 13:33:32 - 2025-04-03 13:33:32 2460769.064953 - 2460769.064953 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
482290 2025-04-03 13:33:32 2460769.064953 19.29 0.18 ABMag L-GOTO GOTO-S_GOTO-4 180
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-04-06 05:59:59 - 2025-04-06 05:59:59 2460771.74999 - 2460771.74999 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
481155 2025-04-06 05:59:59 2460771.74999 18.05 0.091 19.25 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
L-GOTO GOTO-N_GOTO-1 2025-04-01 04:19:41 - 2025-04-01 04:19:41 2460766.68034 - 2460766.68034 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
482289 2025-04-01 04:19:41 2460766.68034 19.9 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-04-05 11:55:14 - 2025-04-08 09:49:38 2460770.9966898 - 2460773.9094676 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
481408 2025-04-08 09:49:38 2460773.9094676 17.1015 0.0587798 ABMag r-ZTF P48_ZTF-Cam
481407 2025-04-05 11:55:14 2460770.9966898 18.2792 0.125853 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-03-30 11:50:04 - 2025-03-30 11:50:04 2460764.9931019 - 2460764.9931019 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
481406 2025-03-30 11:50:04 2460764.9931019 19.5426 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-04-05 12:51:01 - 2025-04-05 12:51:01 2460771.03543 - 2460771.03543 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
481154 2025-04-05 12:51:01 2460771.03543 15.06 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 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
253021 2025-04-29 20:45:01 LAST_Bot1 R. Konno (WIS),E. A. Zimmerman (WIS),A. Horowicz (WIS) et al. LAST LAST 15:37:37.302 -08:43:15.94 2025-04-29 20:15:22.464 16.74 Clear- PSN LAST N
251723 2025-04-16 04:46:25 GOTO_bot G. Ramsay,D. O'Neill,K. Ackley et al. GOTO GOTO 15:37:37.347 -08:43:15.79 2025-04-03 13:33:31.680 19.29 L-GOTO Other GOTO25btp GOTO N
251221 2025-04-08 11:29:22 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 15:37:37.287 -08:43:15.36 2025-04-05 11:55:13.998 18.2792 r-ZTF PSN ZTF25aalughb ZTF N
251128 2025-04-07 09:30:59 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 15:37:37.304 -08:43:15.27 2025-04-06 05:59:59.136 18.05 cyan-ATLAS PSN ATLAS25dqg ATLAS 2025TNSTR1310....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
20742 2025-04-10 19:30:01 Megan Newsome Megan Newsome (Las Cumbres Observatory), Iair Arcavi (Tel Aviv University), Sara Faris (TAU), Yael Dgany (TAU), Moira Andrews (LCO), Joseph Farah (LCO), D. A. Howell (LCO), Curtis McCully (LCO), Chris Ni (LCO) None SN Ia 0.02409 1 1 Using SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to SNe Ia near maximum light, including SN 2003du 11 days before peak. The supernova is closest to MCG -01-40-004 (z = 0.02409, value from NED). Adopting this redshift we measure a Si II 6355 velocity of approximately 12,000 km/s. Adopting the distance modulus computed from this redshift (35.1), the g-band absolute magnitude of the object roughly coeval with the spectrum is -18.3 (apparent magnitude 16.781, from ZTF). This absolute magnitude and velocity is consistent with an SN Ia approaching maximum light. 2025TNSCR1351....1N
Related files
File Comments Last Modified (UT) Modified By
tns_2025gxs_atrep_20742.pdf SNID fit to SN2003du, a type Ia, at 11 days before peak. 2025-04-10 19:30:01 Megan Newsome
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
20742 2025-04-10 13:43:27 FTS / FLOYDS-S 1800 Las Cumbres Observatory Megan Newsome None tns_2025gxs_2025-04-10_13-43-27_FTS_FLOYDS-S_None.ascii Object

Comments

TNS
System

Tue, 04/08/2025 - 11:29

Object coordinates updated

Object coordinates updated according to AT-report 251221 of Group ZTF
Previous RA, DEC: 15:37:37.304, -08:43:15.27 (234.40543375, -8.72090875)
Updated RA, DEC: 15:37:37.287, -08:43:15.36 (234.405364, -8.720934)