RA/DEC (2000)
13:11:37.507 +10:19:59.24
197.9062788 +10.3331234
Type
SLSN-I
Redshift
0.58
Discovery ReportClassification Report
Related AstroNotes: 2025-159, 2025-179, 2025-196
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-04-24 07:42:14.002
TNS AT
Y
Public
Y
Discovery Mag
19.988
Filter
g-ZTF
Reporter/s
Daniel Perley (LJMU), Christoffer Fremling (Caltech), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025kkb - 2025-06-25 00:28:48 Gemini-S / GMOS-S (DESIRT)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

 ▌LAST_LAST-Cam_Clear
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_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
21428 2025-06-25 00:28:48 Gemini-S / GMOS-S 1800 Gemini Staff Xander J. Hall DESIRT tns_2025kkb_2025-06-25_00-28-48_Gemini-S_GMOS-S_DESIRT.dat Object Spectrum is corrected for Milky Way extinction.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2024-03-04 00:16:01 - 2025-05-28 19:41:58 2460373.51112 - 2460824.32081 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
492349 2025-05-28 19:41:58 2460824.32081 19.93 ABMag Clear- LAST_LAST-Cam 400
492348 2024-03-04 00:16:01 2460373.51112 21.73 ABMag Clear- LAST_LAST-Cam 3580 [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-04-20 21:42:31 - 2025-04-21 01:47:34 2460786.404527 - 2460786.574703 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490159 2025-04-21 01:47:34 2460786.574703 19.38 0.19 ABMag L-GOTO GOTO-N_GOTO-1 180
490158 2025-04-20 21:42:31 2460786.404527 19.5 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-04-24 06:46:01 - 2025-04-24 06:46:01 2460789.781956 - 2460789.781956 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
488158 2025-04-24 06:46:01 2460789.781956 20.3181 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-04-24 07:42:14 - 2025-05-12 05:29:11 2460789.8209954 - 2460807.7285995 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
488160 2025-05-12 05:29:11 2460807.7285995 19.4986 0.188423 ABMag g-ZTF P48_ZTF-Cam
488159 2025-04-24 07:42:14 2460789.8209954 19.988 0.132543 ABMag g-ZTF P48_ZTF-Cam
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
257112 2025-05-28 20:01:06 LAST_Bot1 R. Konno (WIS),E. A. Zimmerman (WIS),A. Horowicz (WIS) et al. LAST LAST 13:11:37.485 +10:19:58.80 2025-05-28 19:41:57.984 19.93 Clear- PSN LAST N
255973 2025-05-22 19:11:14 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 13:11:37.494 +10:19:58.88 2025-04-21 01:47:34.080 19.38 L-GOTO Other GOTO25ctj GOTO N
254983 2025-05-14 15:23:32 Fritz Daniel Perley (LJMU),Christoffer Fremling (Caltech),Theophile du Laz (Caltech) on behalf of ZTF et al. ZTF ZTF 13:11:37.507 +10:19:59.24 2025-04-24 07:42:14.002 19.988 g-ZTF PSN ZTF25aaofttb ZTF 2025TNSTR1783....1P N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21428 2025-06-29 05:17:45 Xander Hall Xander J. Hall (CMU), Erica Hammerstein (UC Berkeley), Daniel A. Perley (LJMU), Steve Schulze (NU), Ragnhild Lunnan (OKC/SU), Brendan O’Connor (CMU), Antonella Palmese (CMU), Segev BenZvi (UR), Adam Myers (UWyo) on behalf of the 2DTS team. DESIRT SLSN-I 0.58 1 1 DESIRT We classify AT2025kkb/ZTF25aaofttb as a superluminous supernova (SLSN), with an apparent peak magnitude of m_g = 19.4, a K-corrected peak absolute magnitude of M_g = -22.8, and a redshift of z = 0.58. (Astronote 2025-196) 2025TNSCR2480....1H
Related files
File Comments Last Modified (UT) Modified By
tns_2025kkb_atrep_21428_DESIRT.pdf Best NGPS fit at z = 0.58 2025-06-29 05:17:45 Xander Hall
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
21428 2025-06-25 00:28:48 Gemini-S / GMOS-S 1800 Gemini Staff Xander J. Hall DESIRT tns_2025kkb_2025-06-25_00-28-48_Gemini-S_GMOS-S_DESIRT.dat Object Spectrum is corrected for Milky Way extinction.

Comments