RA/DEC (2000)
15:54:39.855 +46:28:35.62
238.6660632 +46.4765618
Type
SN Ia
Redshift
0.1087
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2026-05-07 07:22:53.002
TNS AT
Y
Public
Y
Discovery Mag
19.8581
Filter
g-ZTF
Reporter/s
Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026lsy - 2026-05-23 00:00:00 Lick-3m / KAST (TRex)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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-N_GOTO-2_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
23863 2026-05-23 00:00:00 Lick-3m / KAST 3660 Natalie LeBaron, Kenneth Lin, Alice Wu Natalie LeBaron TRex tns_2026lsy_2026-05-23_Lick-3m_KAST_TRex.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-05-11 01:05:36 - 2026-05-11 01:05:36 2461171.54556 - 2461171.54556 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
581234 2026-05-11 01:05:36 2461171.54556 19.682 0.147 19.67 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-N_GOTO-2 2026-05-06 00:02:31 - 2026-05-07 23:57:16 2461166.501754 - 2461168.498095 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
582220 2026-05-07 23:57:16 2461168.498095 19.54 0.13 ABMag L-GOTO GOTO-N_GOTO-2 180
582219 2026-05-06 00:02:31 2461166.501754 19.9 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2026-05-03 12:09:31 - 2026-05-09 10:19:19 2461164.0066088 - 2461169.930081 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
580598 2026-05-09 10:19:19 2461169.930081 19.6621 0.140331 ABMag r-ZTF P48_ZTF-Cam
580596 2026-05-03 12:09:31 2461164.0066088 19.6274 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-05-07 07:22:53 - 2026-05-07 07:22:53 2461167.8075579 - 2461167.8075579 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
580597 2026-05-07 07:22:53 2461167.8075579 19.8581 0.151249 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-MLO_ATLAS-01 2026-05-10 10:23:15 - 2026-05-10 10:23:15 2461170.93281 - 2461170.93281 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
581233 2026-05-10 10:23:15 2461170.93281 19.48 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
303572 2026-05-13 16:53:54 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 15:54:39.866 +46:28:35.68 2026-05-07 23:57:15.840 19.54 L-GOTO Other GOTO26epx GOTO N
303105 2026-05-11 09:14:54 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 15:54:39.862 +46:28:35.56 2026-05-11 01:05:36.384 19.682 wide-ATLAS PSN ATLAS26fje ATLAS N
302789 2026-05-09 16:28:43 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 15:54:39.855 +46:28:35.62 2026-05-07 07:22:53.002 19.8581 g-ZTF PSN ZTF26aauxbby ZTF 2026TNSTR2015....1S N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23859 2026-05-29 16:10:58 Natalie LeBaron Natalie LeBaron, Kenneth Lin, Alice Wu, Ryan Chornock (UCB) TRex SN Ia 0.1087 1 TRex We observed SN2026lsy on 5-23-2026 UT with the Kast spectrograph on the Shane telescope. We classify this transient as a SN Ia using SNID-SAGE (Stoppa & Smartt 2026 arXiv:2603.28741). 2026TNSCR2335....1L
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
23863 2026-05-23 00:00:00 Lick-3m / KAST 3660 Natalie LeBaron, Kenneth Lin, Alice Wu Natalie LeBaron TRex tns_2026lsy_2026-05-23_Lick-3m_KAST_TRex.dat Object

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