RA/DEC (2000)
17:01:59.995 +12:54:11.23
255.499979439 +12.9031199267
Type
SN IIn
Redshift
0.276
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2026-05-23 08:07:52.000
TNS AT
Y
Public
Y
Discovery Mag
20.9721
Filter
g-ZTF
Reporter/s
K-Ryan Hinds (Caltech), Christoffer Fremling (Caltech), Mansi Kasliwal (Caltech), Theophile du Laz (Caltech), Thomas Culino (Caltech), Joahan Castaneda Jaimes (CIT, IPAC), Michael Coughlin (UMN), Antoine Le Calloch (UMN) , Pete Bachant (Caltech) on behalf of Z+LIONS
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026ouq - 2026-06-12 00:00:00 Magellan-Clay / LDSS-3 (FLEET)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
z-step:   v-step: 
   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-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_cyan
 ▌PS1_GPC1_w
   
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
24153 2026-06-12 00:00:00 Magellan-Clay / LDSS-3 Harsh Kumar (Harvard CfA), Peter Blanchard (Harvard CfA), Daichi Hiramatsu (UF), Alex Gagliano (CfA) Harsh Kumar (Harvard CfA) FLEET tns_2026ouq_2026-06-12_00-00-00_Magellan-Clay_LDSS-3_FLEET.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-06-20 22:51:24 - 2026-06-20 22:51:24 2461212.45236 - 2461212.45236 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
593789 2026-06-20 22:51:24 2461212.45236 19.679 0.125 20.2 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-N_GOTO-1 2026-05-22 00:45:17 - 2026-06-06 22:48:57 2461182.531449 - 2461198.450659 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
610899 2026-06-06 22:48:57 2461198.450659 20.09 0.15 ABMag L-GOTO GOTO-N_GOTO-1 180
610898 2026-05-22 00:45:17 2461182.531449 20.6 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2026-05-22 09:39:17 - 2026-06-09 08:45:06 2461182.9022801 - 2461200.8646528 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
590717 2026-06-09 08:45:06 2461200.8646528 20.4379 0.213987 ABMag r-ZTF P48_ZTF-Cam
590715 2026-05-22 09:39:17 2461182.9022801 20.6671 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-05-23 08:07:52 - 2026-05-23 08:07:52 2461183.8387963 - 2461183.8387963 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
590716 2026-05-23 08:07:52 2461183.8387963 20.9721 0.18612 ABMag g-ZTF P48_ZTF-Cam
cyan-ATLAS ATLAS-HKO_ATLAS-02 2026-06-20 10:16:51 - 2026-06-20 10:16:51 2461211.92837 - 2461211.92837 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
593788 2026-06-20 10:16:51 2461211.92837 19.56 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
w-P1 PS1_GPC1 2026-05-25 12:07:31 - 2026-05-25 12:07:31 2461186.00522 - 2461186.00522 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
593752 2026-05-25 12:07:31 2461186.00522 20.92 0.12 22 ABMag w-P1 PS1_GPC1 45 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
319353 2026-08-07 18:32:10 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 17:01:59.987 +12:54:11.17 2026-06-06 22:48:57.024 20.09 L-GOTO Other GOTO26hxx GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. This candidate was flagged by volunteers: Antonio Pasqua, Ciro Sirio Perrella, Sauro Gaudenzi, Shogo Noma, Virgilio Gonano. The most likely subtype for this transient is hostless transient (44.4% consensus). N
309600 2026-06-22 07:35:36 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 17:01:59.996 +12:54:11.08 2026-06-20 22:51:23.904 19.679 wide-ATLAS PSN ATLAS26hnc ATLAS N
309582 2026-06-21 23:51:02 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 17:01:59.995 +12:54:11.23 2026-05-25 12:07:31.008 20.92 w-P1 PSN PS26cjw Pan-STARRS N
307925 2026-06-10 05:53:30 ZTF_LIONS K-Ryan Hinds (Caltech), Christoffer Fremling (Caltech), Mansi Kasliwal (Caltech) et al. ZTF ZTF 17:02:00.001 +12:54:11.33 2026-05-23 08:07:52.000 20.9721 g-ZTF PSN ZTF26abagawv ZTF 2026TNSTR2430....1H N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
24147 2026-06-29 19:39:13 TNS_Query Harsh Kumar (Harvard CfA), Peter Blanchard (Harvard CfA), Daichi Hiramatsu (UF), Alex Gagliano (CfA) FLEET SN IIn 0.276 1 FLEET Classified as IIn at z=0.276, based on match to SN IIn (ASASSN-14il) using SNID-SAGE (Stoppa, F. and Smartt, S. J. 2026).
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
24153 2026-06-12 00:00:00 Magellan-Clay / LDSS-3 Harsh Kumar (Harvard CfA), Peter Blanchard (Harvard CfA), Daichi Hiramatsu (UF), Alex Gagliano (CfA) Harsh Kumar (Harvard CfA) FLEET tns_2026ouq_2026-06-12_00-00-00_Magellan-Clay_LDSS-3_FLEET.ascii Object

Comments

TNS
System

Sun, 06/21/2026 - 23:51

Object coordinates updated

Object coordinates updated according to AT-report 309582 of Group Pan-STARRS
Previous RA, DEC: 17:02:00.001, +12:54:11.33 (255.5000024, +12.903148)
Updated RA, DEC: 17:01:59.995, +12:54:11.23 (255.499979439, +12.9031199267)