RA/DEC (2000)
16:23:34.394 +36:00:12.88
245.893309261 +36.0035774927
Type
SN II
Redshift
0.031
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-04-22 01:32:29.472
TNS AT
Y
Public
Y
Discovery Mag
19.38
Filter
L-GOTO
Reporter/s
G. Ramsay, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026kmm - 2026-05-29 00:54:16 LT / SPRAT (GOTO)z=
 ▌SN_2026kmm - 2026-04-26 00:00:00 UH88 / SNIFS (SCAT)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
 ▌PS2_GPC2_w
 ▌P48_ZTF-Cam_r
 ▌ATLAS-HKO_ATLAS-02_orange
 ▌PS1_GPC1_i
   
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
23859 2026-05-29 00:54:16 LT / SPRAT Robotic GOTO tns_2026kmm_2461189.537693_LT_SPRAT_GOTO.dat Object
23561 2026-04-26 00:00:00 UH88 / SNIFS C. Angus SCAT tns_2026kmm_2026-04-26_UH88_SNIFS_SCAT.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-04-15 04:28:31 - 2026-04-15 04:28:31 2461145.68647 - 2461145.68647 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577670 2026-04-15 04:28:31 2461145.68647 20.25 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-2 2026-04-21 01:40:00 - 2026-04-22 01:32:29 2461151.569447 - 2461152.564227 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577300 2026-04-22 01:32:29 2461152.564227 19.38 0.15 ABMag L-GOTO GOTO-N_GOTO-2 180
577299 2026-04-21 01:40:00 2461151.569447 20 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
w-P1 PS2_GPC2 2026-05-07 13:10:52 - 2026-05-07 13:10:52 2461168.04921 - 2461168.04921 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
581125 2026-05-07 13:10:52 2461168.04921 16.95 0.01 22 ABMag w-P1 PS2_GPC2 45 Robot
r-ZTF P48_ZTF-Cam 2026-04-17 10:37:50 - 2026-04-28 12:14:40 2461147.9429398 - 2461159.0101852 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
578637 2026-04-28 12:14:40 2461159.0101852 17.1779 0.062033 ABMag r-ZTF P48_ZTF-Cam
578636 2026-04-21 09:40:42 2461151.9032639 20.4911 0.162063 ABMag r-ZTF P48_ZTF-Cam
578635 2026-04-17 10:37:50 2461147.9429398 21.0159 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-04-22 13:06:43 - 2026-04-22 13:06:43 2461153.04633 - 2461153.04633 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577671 2026-04-22 13:06:43 2461153.04633 19.303 0.183 19.52 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
i-P1 PS1_GPC1 2026-05-11 14:01:09 - 2026-05-11 14:01:09 2461172.08413 - 2461172.08413 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
581607 2026-05-11 14:01:09 2461172.08413 17 0.03 20.7 ABMag i-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
303304 2026-05-11 17:50:10 YSE_Bot1 D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al. YSE Pan-STARRS 16:23:34.394 +36:00:12.88 2026-05-11 14:01:08.832 17 i-P1 PSN PS26bfr Pan-STARRS N
303053 2026-05-10 15:18:48 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 16:23:34.401 +36:00:12.85 2026-05-07 13:10:51.744 16.95 w-P1 PSN PS26bfr Pan-STARRS N
301833 2026-04-28 12:54:10 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 16:23:34.407 +36:00:12.81 2026-04-21 09:40:42.000 20.4911 r-ZTF PSN ZTF18aawibgr ZTF N
301333 2026-04-24 10:52:29 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 16:23:34.388 +36:00:13.15 2026-04-22 13:06:42.912 19.303 orange-ATLAS PSN ATLAS26euv ATLAS N
301162 2026-04-23 15:12:42 GOTO_bot G. Ramsay, D. O'Neill, K. Ackley et al. GOTO GOTO 16:23:34.433 +36:00:12.77 2026-04-22 01:32:29.472 19.38 L-GOTO Other GOTO26dql GOTO 2026TNSTR1780....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23855 2026-05-29 09:45:44 GOTO_bot M. Pursiainen, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, D. O'Neill, on behalf of GOTO collaboration GOTO SN II 0.031 1 GOTO Prominent broad Ha emission consistent with Type II SN. 2026TNSCR2333....1P
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
23859 2026-05-29 00:54:16 LT / SPRAT Robotic GOTO tns_2026kmm_2461189.537693_LT_SPRAT_GOTO.dat Object
23558 2026-04-26 15:45:34 Charlotte Angus C. Angus (QUB) on behalf of SCAT SCAT SN 0.031 1 SCAT Spectrum taken with UH88/SNIFS on 26/04/2026. Spectrum shows a blue continuum with narrow balmer and He II emission lines present, with some underlying broader He-II emission. Features are consistent with a young core collapse supernova, in line with the light curve phase. 2026TNSCR1837....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
23561 2026-04-26 00:00:00 UH88 / SNIFS C. Angus SCAT tns_2026kmm_2026-04-26_UH88_SNIFS_SCAT.dat Object

Comments

TNS
System

Mon, 05/11/2026 - 17:50

Object coordinates updated

Object coordinates updated according to AT-report 303304 of Group Pan-STARRS
Previous RA, DEC: 16:23:34.401, +36:00:12.85 (245.893337198, +36.003569722)
Updated RA, DEC: 16:23:34.394, +36:00:12.88 (245.893309261, +36.0035774927)

TNS
System

Sun, 05/10/2026 - 15:18

Object coordinates updated

Object coordinates updated according to AT-report 303053 of Group Pan-STARRS
Previous RA, DEC: 16:23:34.407, +36:00:12.81 (245.8933614, +36.0035592)
Updated RA, DEC: 16:23:34.401, +36:00:12.85 (245.893337198, +36.003569722)

TNS
System

Tue, 04/28/2026 - 12:54

Object coordinates updated

Object coordinates updated according to AT-report 301833 of Group ZTF
Previous RA, DEC: 16:23:34.388, +36:00:13.15 (245.893283333, +36.0036533333)
Updated RA, DEC: 16:23:34.407, +36:00:12.81 (245.8933614, +36.0035592)

TNS
System

Fri, 04/24/2026 - 10:52

Object coordinates updated

Object coordinates updated according to AT-report 301333 of Group ATLAS
Previous RA, DEC: 16:23:34.433, +36:00:12.77 (245.89347, +36.003547)
Updated RA, DEC: 16:23:34.388, +36:00:13.15 (245.893283333, +36.0036533333)