RA/DEC (2000)
13:07:15.755 -25:49:53.23
196.8156465 -25.8314528
Type
SN Ia
Redshift
0.059828
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-04-06 07:31:53.002
TNS AT
Y
Public
Y
Discovery Mag
18.3846
Filter
g-ZTF
Reporter/s
Nabeel Rehemtulla (CIERA, NU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025gzd - 2025-04-28 22:20:10 LT / SPRAT (ZTF)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

 ▌P48_ZTF-Cam_g
   
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
20920 2025-04-28 22:20:10 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath Jacob Wise ZTF tns_2025gzd_2025-04-28_22-20-09.983_LT_SPRAT_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-ZTF P48_ZTF-Cam 2025-03-27 08:32:22 - 2025-04-08 07:02:02 2460761.8558102 - 2460773.7930787 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
481362 2025-04-08 07:02:02 2460773.7930787 18.2928 0.142329 ABMag g-ZTF P48_ZTF-Cam
481361 2025-04-06 07:31:53 2460771.8138079 18.3846 0.120161 ABMag g-ZTF P48_ZTF-Cam
481360 2025-03-27 08:32:22 2460761.8558102 19.9369 ABMag g-ZTF P48_ZTF-Cam [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
251201 2025-04-08 07:09:17 Fritz Nabeel Rehemtulla (CIERA,NU),Christoffer Fremling (Caltech) et al. ZTF ZTF 13:07:15.755 -25:49:53.23 2025-04-06 07:31:53.002 18.3846 g-ZTF PSN ZTF25aalrums ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). 2025TNSTR1329....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
20920 2025-04-29 10:43:41 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU) ZTF SN Ia 0.059828 1 1 ZTF Spectrum is well-fit by template spectra from previously classified SN Ia. Redshift of z = 0.059828 ± 0.000150 from The 6dF Galaxy Survey Data Release 3. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022). We note that this is a simultaneous sibling supernova of the SN Ia 2025ewa, separated by ~2". 2025TNSCR1590....1W
Related files
File Comments Last Modified (UT) Modified By
tns_2025gzd_atrep_20920_ZTF.pdf NGSF fits 2025-04-29 10:43:41 Jacob Wise
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
20920 2025-04-28 22:20:10 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath Jacob Wise ZTF tns_2025gzd_2025-04-28_22-20-09.983_LT_SPRAT_ZTF.spec Object

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