RA/DEC (2000)
10:07:04.516 +02:32:49.00
151.768817 +2.546944
Type
SLSN-I
Redshift
1.056
Discovery ReportClassification Report
Related AstroNotes: 2026-49, 2026-68
Reporting Group
YSE
Discovering Data Source
YSE
Discovery Date
2025-11-24 08:12:02.880
TNS AT
Y
Public
Y
Discovery Mag
23.304
Filter
g-Sloan
Reporter/s
C. T. Murphey, A. Arunachalam, G. Nair, G. Narayan (UIUC), R. J. Foley (UCSC), A. Rest (JHU, STScI), D. O. Jones (UH, IfA), K. de Soto (Harvard, CfA), C. Ni (KITP), H. Perkins, J. Henricks (UIUC), K. Patra (UCSC), C. Ransome, Y. Dong (Harvard, CfA), Y. Chen (U Toronto), K. Auchettl (U. Melbourne, UCSC), K. Taggart (UCSC), C. Kilpatrick (Northwestern), A. Zenteno, W. Liu, K. Vivas (NOIRLab), S. Sharief (U. Montreal), A. Wasserman, M. Verrico, A. Agarwal (UIUC), Q. Wang (STScI, MIT), R. Angulo (STScI, JHU), H. Abunemeh, N. Earl, K. D. French, A. Mitra, J. O'Brien, M. Shepherd (UIUC), M. Grayling, E. Hayes, K. S. Mandel (Cambridge), D. Farías, C. Gall, A. Hajela, J. Hjorth, L. Izzo, D. Langeroodi, A. Sedgewick, R. Wojtak (DARK, NBI), S. Raimunda (DARK, NBI, U. Southampton), A. Gagliano, S. Gomez, S. Rankin, V. A. Villar, A. Tartaglia, A. Nugent, S. K. Yadavalli (Harvard, CfA), S. Smartt, K. Smith (QUB, Oxford), D. Coulter, J. Pierel, M. Seibert (STScI), P. Arunachalam, K. W. Davis, R. Kaur, P. Macias, C. Rojas-Bravo, E. Ramirez-Ruiz (UCSC), K. C. Chambers, M. E. Huber, E. G. Magnier, R. J. Wainscoat (UH, IfA), M. Drout (U. Toronto), V. Baldasarre, A. Messick (WSU), C. Angus (QUB), S. Thorpe (Stockholm U.), Y.-C. Pan (NCU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025altn - 2026-03-08 12:10:38 Keck2 / DEIMOS (ZTF)z=
 ▌SN_2025altn - 2026-03-08 12:10:38 Keck2 / DEIMOS (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

 ▌CTIO-4m_DECAM_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
23192 2026-03-08 12:10:38 Keck2 / DEIMOS Wynn Jacobson-Galan ZTF tns_2025altn_2026-03-08_12-10-38_Keck2_DEIMOS_ZTF.flm Object
23188 2026-03-08 12:10:38 Keck2 / DEIMOS Wynn Jacobson-Galan ZTF tns_2025altn_2026-03-08_12-10-37.75_Keck2_DEIMOS_ZTF.flm Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-Sloan CTIO-4m_DECAM 2025-11-03 08:34:09 - 2025-11-24 08:12:03 2460982.85705 - 2461003.8417 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
561335 2025-11-24 08:12:03 2461003.8417 23.304 0.209 23.9013 ABMag g-Sloan CTIO-4m_DECAM 50
561334 2025-11-03 08:34:09 2460982.85705 22.238 ABMag g-Sloan CTIO-4m_DECAM 50 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
292831 2026-02-24 23:16:32 YSE_DECam C. T. Murphey, A. Arunachalam, G. Nair et al. YSE YSE 10:07:04.516 +02:32:49.00 2025-11-24 08:12:02.880 23.304 g-Sloan PSN YSE 2026TNSTR.783....1M N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23191 2026-03-12 21:11:28 Wynn Jacobson-Galan Wynn Jacobson-Galan ZTF SLSN-I 1.056 1 ZTF We thank Ryan Chornock for identifying the Mg II and confirming classification of a SLSN-I at z=1.056. 2026TNSCR1048....1J
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
23192 2026-03-08 12:10:38 Keck2 / DEIMOS Wynn Jacobson-Galan ZTF tns_2025altn_2026-03-08_12-10-38_Keck2_DEIMOS_ZTF.flm Object
23187 2026-03-12 18:17:16 Wynn Jacobson-Galan Wynn Jacobson-Galan ZTF SN I 1 ZTF 2026TNSCR1048....1J
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
23188 2026-03-08 12:10:38 Keck2 / DEIMOS Wynn Jacobson-Galan ZTF tns_2025altn_2026-03-08_12-10-37.75_Keck2_DEIMOS_ZTF.flm Object

Comments