RA/DEC (2000)
12:51:56.463 +16:16:53.32
192.985262638 +16.2814786365
Type
SN IIb
Redshift
0.021
Discovery ReportClassification Report
Related AstroNotes: 2026-149, 2026-150
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2026-05-19 04:28:17.996
TNS AT
Y
Public
Y
Discovery Mag
19.6515
Filter
g-ZTF
Reporter/s
Jesper Sollerman (SU) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026naq - 2026-05-22 00:00:00 NOT / ALFOSC (ENGRAVE)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
 ▌LAST_LAST-Cam_Clear
 ▌PS2_GPC2_z
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_i
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_cyan
   
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
23806 2026-05-22 00:00:00 NOT / ALFOSC K. Valeckas L. Izzo ENGRAVE tns_2026naq_2026-05-22_NOT_ALFOSC_ENGRAVE.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-05-18 23:40:05 - 2026-05-18 23:40:05 2461179.48617 - 2461179.48617 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
584130 2026-05-18 23:40:05 2461179.48617 20.17 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
Clear- LAST_LAST-Cam 2026-05-13 19:46:17 - 2026-05-20 19:33:32 2461174.32381 - 2461181.31495 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
584453 2026-05-20 19:33:32 2461181.31495 19.44 ABMag Clear- LAST_LAST-Cam 400
584452 2026-05-13 19:46:17 2461174.32381 20.97 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
z-P1 PS2_GPC2 2026-05-24 06:13:19 - 2026-05-24 06:13:19 2461184.75925 - 2461184.75925 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
587673 2026-05-24 06:13:19 2461184.75925 20.38 0.3 20.4 ABMag z-P1 PS2_GPC2 200 Robot
L-GOTO GOTO-N_GOTO-1 2026-05-18 21:33:03 - 2026-05-19 21:27:16 2461179.397951 - 2461180.393928 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
584037 2026-05-19 21:27:16 2461180.393928 19.32 0.11 ABMag L-GOTO GOTO-N_GOTO-1 180
584036 2026-05-18 21:33:03 2461179.397951 20 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
i-ZTF P48_ZTF-Cam 2026-05-16 08:21:04 - 2026-05-16 08:21:04 2461176.847963 - 2461176.847963 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
583756 2026-05-16 08:21:04 2461176.847963 20.3048 ABMag i-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-05-19 04:28:18 - 2026-05-19 04:28:18 2461179.6863194 - 2461179.6863194 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
583757 2026-05-19 04:28:18 2461179.6863194 19.6515 0.14434 ABMag g-ZTF P48_ZTF-Cam
583758 2026-05-19 04:28:18 2461179.6863194 19.6515 0.14434 ABMag g-ZTF P48_ZTF-Cam
cyan-ATLAS ATLAS-HKO_ATLAS-02 2026-05-20 08:08:41 - 2026-05-20 08:08:41 2461180.83936 - 2461180.83936 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
584131 2026-05-20 08:08:41 2461180.83936 19.187 0.173 19.49 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 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
306401 2026-05-28 07:20:00 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 12:51:56.463 +16:16:53.32 2026-05-24 06:13:19.200 20.38 z-P1 PSN PS26bmo Pan-STARRS N
304823 2026-05-21 19:05:33 LAST_Bot1 E. O. Ofek (WIS), R. Konno (WIS), E. A. Zimmerman (WIS) et al. LAST LAST 12:51:56.429 +16:16:53.43 2026-05-20 19:33:31.680 19.44 Clear- PSN LAST N
304674 2026-05-20 13:42:47 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 12:51:56.440 +16:16:53.82 2026-05-20 08:08:40.704 19.187 cyan-ATLAS PSN ATLAS26gdn ATLAS N
304633 2026-05-19 21:56:25 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 12:51:56.473 +16:16:53.74 2026-05-19 21:27:15.552 19.32 L-GOTO Other GOTO26eyx GOTO N
304494 2026-05-19 05:36:26 Fritz Jesper Sollerman (SU) on behalf of ZTF ZTF ZTF 12:51:56.470 +16:16:53.47 2026-05-19 04:28:17.996 19.6515 g-ZTF PSN ZTF26aaxgdqa ZTF 2026TNSTR2179....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
23802 2026-05-23 03:03:11 Giorgos Leloudas L. Izzo (INAF/OACN and DARK/NBI), G. Leloudas (DTU Space), D. B. Malesani (DAWN/NBI and Radboud), K. Valeckas (NOT) ENGRAVE SN IIb 0.021 1 ENGRAVE Best match is a Type IIb supernova. Redshift from host galaxy lines. 2026TNSCR2251....1I
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
23806 2026-05-22 00:00:00 NOT / ALFOSC K. Valeckas L. Izzo ENGRAVE tns_2026naq_2026-05-22_NOT_ALFOSC_ENGRAVE.txt Object

Comments

TNS
System

Thu, 05/28/2026 - 07:20

Object coordinates updated

Object coordinates updated according to AT-report 306401 of Group Pan-STARRS
Previous RA, DEC: 12:51:56.470, +16:16:53.47 (192.9852919, +16.2815208)
Updated RA, DEC: 12:51:56.463, +16:16:53.32 (192.985262638, +16.2814786365)