RA/DEC (2000)
19:49:06.908 +78:51:20.32
297.2787842 +78.8556448
Type
SLSN-I
Redshift
0.1734
Related AstroNotes: 2025-143, 2025-159, 2025-161, 2025-179
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-04-22 09:21:29.001
TNS AT
Y
Public
Y
Discovery Mag
19.8542
Filter
g-ZTF
Reporter/s
Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF

Spectra

 SN_2025izy - 2025-06-22 08:09:31 MMT / BINOSPEC (FLEET)z=
Show H at z=vexp= km/s
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Show [Ca II] at z=vexp= km/s
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Show Tellurics 
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 GOTO-N_GOTO-2_L
 P48_ZTF-Cam_r
 P48_ZTF-Cam_g
 ATLAS-MLO_ATLAS-01_orange
 ATLAS-HKO_ATLAS-02_orange
   
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
21392 2025-06-22 08:09:31 MMT / BINOSPEC Harsh Kumar (Harvard CfA), Peter Blanchard (Harvard CfA), Daichi Hiramatsu (Harvard CfA), Sebastian Gomez (CfA) FLEET tns_2025izy_2025-06-22_08-09-31_MMT_BINOSPEC_FLEET.ascii Object Classification based on NGSF template match to Ic with peak absolute magnitude of ~ -20.7. The turnover on the blue end is likely superficial and needs a calibration with photometry.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-04-21 03:51:41 - 2025-04-26 05:04:20 2460786.660891 - 2460791.711343 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491278 2025-04-26 05:04:20 2460791.711343 19.17 0.18 ABMag L-GOTO GOTO-N_GOTO-2 180
491277 2025-04-21 03:51:41 2460786.660891 19.5 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-04-20 09:50:07 - 2025-04-20 09:50:07 2460785.9098032 - 2460785.9098032 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
485551 2025-04-20 09:50:07 2460785.9098032 19.2357 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-04-22 09:21:29 - 2025-05-02 11:08:09 2460787.889919 - 2460797.9639931 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
485553 2025-05-02 11:08:09 2460797.9639931 19.5894 0.120941 ABMag g-ZTF P48_ZTF-Cam
485552 2025-04-22 09:21:29 2460787.889919 19.8542 0.191152 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-05-22 12:11:08 - 2025-05-22 12:11:08 2460818.00773 - 2460818.00773 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490853 2025-05-22 12:11:08 2460818.00773 18.88 0.159 19.14 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-05-16 13:12:39 - 2025-05-16 13:12:39 2460812.05045 - 2460812.05045 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490852 2025-05-16 13:12:39 2460812.05045 17.29 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
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
256615 2025-05-25 08:35:17 GOTO_bot A. Kumar, D. O'Neill, K. Ackley et al. GOTO GOTO 19:49:06.981 +78:51:19.88 2025-04-26 05:04:19.776 19.17 L-GOTO Other GOTO25dbw GOTO N
256361 2025-05-24 11:48:13 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 19:49:06.694 +78:51:20.37 2025-05-22 12:11:07.872 18.88 orange-ATLAS PSN ATLAS25fia ATLAS N
253399 2025-05-02 14:46:47 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 19:49:06.908 +78:51:20.32 2025-04-22 09:21:29.001 19.8542 g-ZTF PSN ZTF25aanxtou ZTF 2025TNSTR1632....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
21392 2025-06-24 19:53:24 Harsh Kumar Harsh Kumar (Harvard CfA), Peter Blanchard (Harvard CfA), Daichi Hiramatsu (Harvard CfA), Sebastian Gomez (CfA), Edo Berger (Harvard CfA) FLEET SLSN-I 0.1734 1 FLEET 2025TNSCR2386....1K
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
21392 2025-06-22 08:09:31 MMT / BINOSPEC Harsh Kumar (Harvard CfA), Peter Blanchard (Harvard CfA), Daichi Hiramatsu (Harvard CfA), Sebastian Gomez (CfA) FLEET tns_2025izy_2025-06-22_08-09-31_MMT_BINOSPEC_FLEET.ascii Object Classification based on NGSF template match to Ic with peak absolute magnitude of ~ -20.7. The turnover on the blue end is likely superficial and needs a calibration with photometry.

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