RA/DEC (2000)
09:58:24.467 +00:43:41.12
149.601947 +0.728089
Type
SN II
Redshift
0.065
Discovery ReportClassification Report
Related AstroNotes: 2026-68, 2026-81
Reporting Group
YSE
Discovering Data Source
YSE
Discovery Date
2025-12-18 08:07:06.528
TNS AT
Y
Public
Y
Discovery Mag
22.594
Filter
g-Sloan
Reporter/s
C. T. Murphey, 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, G. Nair, A. Arunachalam, 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_2025alrj - 2026-03-12 04:07:26 Mayall / DESI (DESI)z=
 ▌SN_2025alrj - 2026-03-08 11:05:32 Keck2 / DEIMOS (ZTF)z=
 ▌SN_2025alrj - 2026-02-27 00:00:00 VLT-UT1 / FORS2 (OxQUB)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

 ▌Rubin_LSSTCam_y
 ▌Rubin_LSSTCam_z
 ▌Rubin_LSSTCam_i
 ▌Rubin_LSSTCam_r
 ▌Rubin_LSSTCam_g
 ▌Rubin_LSSTCam_u
 ▌CTIO-4m_DECAM_i
 ▌CTIO-4m_DECAM_g
 ▌PS1_GPC1_r
   
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
23232 2026-03-12 04:07:26 Mayall / DESI DESI DESI tns_2025alrj_2026-03-12_04-07-26_Mayall_DESI_DESI.ascii Object
23185 2026-03-08 11:05:32 Keck2 / DEIMOS Wynn Jacobson-Galan ZTF tns_2025alrj_2026-03-08_11-05-32.17_Keck2_DEIMOS_ZTF.flm Object
23133 2026-02-27 00:00:00 VLT-UT1 / FORS2 VLT Staff C. Angus OxQUB tns_2025alrj_2026-02-27_VLT-UT1_FORS2_OxQUB.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
y-LSST Rubin_LSSTCam 2026-01-28 06:36:08 - 2026-01-28 06:36:08 2461068.7750926 - 2461068.7750926 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563352 2026-01-28 06:36:08 2461068.7750926 21.2 0.146 ABMag y-LSST Rubin_LSSTCam
z-LSST Rubin_LSSTCam 2026-02-17 05:08:38 - 2026-03-07 05:57:19 2461088.7143287 - 2461106.7481366 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563209 2026-03-07 05:57:19 2461106.7481366 20.82 0.028 ABMag z-LSST Rubin_LSSTCam
563354 2026-02-17 05:08:38 2461088.7143287 20.98 0.027 ABMag z-LSST Rubin_LSSTCam
i-LSST Rubin_LSSTCam 2026-01-19 07:09:12 - 2026-01-19 07:09:12 2461059.7980556 - 2461059.7980556 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563349 2026-01-19 07:09:12 2461059.7980556 22 0.063 ABMag i-LSST Rubin_LSSTCam
r-LSST Rubin_LSSTCam 2026-01-20 06:59:45 - 2026-03-07 05:50:27 2461060.7914931 - 2461106.7433681 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563208 2026-03-07 05:50:27 2461106.7433681 20.99 0.028 ABMag r-LSST Rubin_LSSTCam
563353 2026-02-17 05:05:55 2461088.7124421 21.09 0.016 ABMag r-LSST Rubin_LSSTCam
563351 2026-01-20 06:59:45 2461060.7914931 21.58 0.024 ABMag r-LSST Rubin_LSSTCam
g-LSST Rubin_LSSTCam 2026-01-17 07:17:50 - 2026-03-06 02:33:19 2461057.8040509 - 2461105.6064699 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563207 2026-03-06 02:33:19 2461105.6064699 21.59 0.046 ABMag g-LSST Rubin_LSSTCam
563348 2026-01-19 07:01:30 2461059.7927083 21.5 0.022 ABMag g-LSST Rubin_LSSTCam
563206 2026-01-17 07:17:50 2461057.8040509 24.34 0.2 ABMag g-LSST Rubin_LSSTCam
u-LSST Rubin_LSSTCam 2026-01-20 03:05:37 - 2026-01-20 03:05:37 2461060.6289005 - 2461060.6289005 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563350 2026-01-20 03:05:37 2461060.6289005 21.09 0.075 ABMag u-LSST Rubin_LSSTCam
i-Sloan CTIO-4m_DECAM 2026-01-28 07:18:54 - 2026-01-28 07:18:54 2461068.8047868 - 2461068.8047868 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
557527 2026-01-28 07:18:54 2461068.8047868 21.1636 0.0919718 ABMag i-Sloan CTIO-4m_DECAM
g-Sloan CTIO-4m_DECAM 2025-12-11 08:11:48 - 2026-01-14 05:51:08 2461020.84153 - 2461054.74384 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
561327 2026-01-14 05:51:08 2461054.74384 23.158 0.178 23.932 ABMag g-Sloan CTIO-4m_DECAM 50
561326 2026-01-03 06:53:10 2461043.78692 22.3371 ABMag g-Sloan CTIO-4m_DECAM 50 Robot [Last non detection]
555317 2025-12-18 08:07:07 2461027.83827 22.594 0.104 23.9507 ABMag g-Sloan CTIO-4m_DECAM 50
555316 2025-12-11 08:11:48 2461020.84153 22.8171 ABMag g-Sloan CTIO-4m_DECAM 50 Robot [Last non detection]
r-P1 PS1_GPC1 2026-01-29 10:58:34 - 2026-01-29 10:58:34 2461069.95734 - 2461069.95734 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
556202 2026-01-29 10:58:34 2461069.95734 21.18 0.27 20.6 ABMag r-P1 PS1_GPC1 27 Robot
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
293865 2026-03-08 09:37:20 Andrea Reguitti Andrea Reguitti (INAF-OAPd) Padova-Asiago Rubin 09:58:24.467 +00:43:41.12 2026-01-19 07:01:30.000 21.5 g-LSST PSN SDSS J095824.46+004341.0 LSST-P-DO-313875416830444113 Rubin N
293806 2026-03-07 09:45:37 Andrea Reguitti Andrea Reguitti (INAF-OAPd) Padova-Asiago Rubin 09:58:24.467 +00:43:41.12 2026-01-17 07:17:50.000 24.34 g-LSST PSN SDSS J095824.46+004341.0 LSST-P-DO-313998569623257167 Rubin N
292827 2026-02-24 23:16:32 YSE_DECam C. T. Murphey, A. Arunachalam, G. Nair et al. YSE YSE 09:58:24.470 +00:43:41.23 2026-01-14 05:51:07.776 23.158 g-Sloan PSN YSE N
290819 2026-02-10 20:45:31 DESIRT_Bot Xander J. Hall (Carnegie Mellon U.), Lei Hu (Carnegie Mellon U.), Antonella Palmese (Carnegie Mellon U.) et al. DESIRT DESIRT 09:58:24.484 +00:43:41.13 2026-01-28 07:18:53.856 21.1636 i-Sloan PSN A202601280958245p004341 DESIRT Discovered in a joint DESIRT/YSE Field N
290133 2026-02-07 01:32:48 YSE_Bot1 D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al. YSE Pan-STARRS 09:58:24.465 +00:43:41.13 2026-01-29 10:58:34.176 21.18 r-P1 PSN PS26su Pan-STARRS N
289707 2026-02-01 23:16:00 YSE_DECam C. T. Murphey, G. Narayan (UIUC), R. J. Foley (UCSC) et al. YSE YSE 09:58:24.469 +00:43:41.31 2025-12-18 08:07:06.528 22.594 g-Sloan PSN YSE 2026TNSTR.430....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
23231 2026-03-16 23:51:22 Xander Hall Xander J. Hall (CMU), John Banovez (LBNL), Antonella Palmese (CMU), Stephen Bailey (LBNL), Segev BenZvi (U Rochester), Xinyi Chen (Yale), Dylan Green (LBNL), Anthony Kremin (LBNL), Adam Myers (U of Wyoming), David Schlegel (LBNL), Swayamtrupta Panda (NOIRLab) on behalf of the DESI Collaboration DESI SN II 0.065 1 DESI Classified as part of the DESI Transients Survey (DTS; Hall et al. 2026) 2026TNSCR1122....1H
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
23232 2026-03-12 04:07:26 Mayall / DESI DESI DESI tns_2025alrj_2026-03-12_04-07-26_Mayall_DESI_DESI.ascii Object
23184 2026-03-12 18:06:37 Wynn Jacobson-Galan Wynn Jacobson-Galan ZTF SN IIP 0.064 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
23185 2026-03-08 11:05:32 Keck2 / DEIMOS Wynn Jacobson-Galan ZTF tns_2025alrj_2026-03-08_11-05-32.17_Keck2_DEIMOS_ZTF.flm Object
23132 2026-03-04 18:02:42 Charlotte Angus C. Angus (QUB), P. Wiseman (Southampton) OxQUB SN II 0.064 1 OxQUB Spectrum taken with VLT/FORS2 on 27/02/2026. Template matches to SNe II, narrow host lines give redshift z=0.064. Classification was done using SNID. 2026TNSCR.914....1A
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
23133 2026-02-27 00:00:00 VLT-UT1 / FORS2 VLT Staff C. Angus OxQUB tns_2025alrj_2026-02-27_VLT-UT1_FORS2_OxQUB.txt Object

Comments

TNS
System

Sun, 03/08/2026 - 09:37

Object coordinates updated

Object coordinates updated according to AT-report 293865 of Group Rubin
Previous RA, DEC: 09:58:24.467, +00:43:41.12 (149.601946, +0.728089)
Updated RA, DEC: 09:58:24.467, +00:43:41.12 (149.601947, +0.728089)

TNS
System

Sat, 03/07/2026 - 09:45

Object coordinates updated

Object coordinates updated according to AT-report 293806 of Group Rubin
Previous RA, DEC: 09:58:24.465, +00:43:41.13 (149.601938379, +0.728090325403)
Updated RA, DEC: 09:58:24.467, +00:43:41.12 (149.601946, +0.728089)

TNS
System

Sat, 02/07/2026 - 01:32

Object coordinates updated

Object coordinates updated according to AT-report 290133 of Group Pan-STARRS
Previous RA, DEC: 09:58:24.469, +00:43:41.31 (149.601954, +0.728142)
Updated RA, DEC: 09:58:24.465, +00:43:41.13 (149.601938379, +0.728090325403)