RA/DEC (2000)
09:22:40.158 +60:52:06.88
140.6673268 +60.8685771
Type
SN IIb
Redshift
0.02588
Discovery ReportClassification Report
Reporting Group
None
Discovering Data Source
None
Discovery Date
2025-06-24 21:07:00.000
TNS AT
Y
Public
Y
Host Name
UGC 4973
Discovery Mag
17
Filter
Clear-
Reporter/s
Giancarlo Cortini
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025ovr - 2025-06-28 21:33:00 BL41 / FOSC-E5535 (None)z=
 ▌SN_2025ovr - 2025-06-28 00:00:00 Keck1 / LRIS (ZTF)z=
 ▌SN_2025ovr - 2025-06-27 00:00:00 UH88 / SNIFS (SCAT)z=
▌Show H at z=vexp= km/s
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▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
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▌Show N V at z=vexp= km/s
▌Show O at z=vexp= km/s
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▌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
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▌Show Tellurics 
▌Show Galaxy lines at z=
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌P48_ZTF-Cam_r
 ▌Other_Other_Clear
   
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
21434 2025-06-28 21:33:00 BL41 / FOSC-E5535 3600 Balcon Balcon None tns_2025ovr_2025-06-28_21-33-00_BL41_FOSC-E5535_None.dat tns_2025ovr_2025-06-28_21-33-00_BL41_FOSC-E5535_None.fit Object
21461 2025-06-28 00:00:00 Keck1 / LRIS 300 Kaustav Kashyap Das, Wynn Jacobson-Galán Kaustav Kashyap Das ZTF tns_2025ovr_2025-06-28_00-00-00_Keck1_LRIS_ZTF.ascii Object
21419 2025-06-27 00:00:00 UH88 / SNIFS 600 Hoogendam Hoogendam SCAT tns_2025ovr_2025-06-27_UH88_SNIFS_SCAT.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2025-06-06 04:27:28 - 2025-06-27 04:12:07 2460832.6857407 - 2460853.675081 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498597 2025-06-27 04:12:07 2460853.675081 17.7048 0.0608141 ABMag r-ZTF P48_ZTF-Cam
498596 2025-06-26 03:59:28 2460852.6662963 17.8289 0.091799 ABMag r-ZTF P48_ZTF-Cam
498595 2025-06-06 04:27:28 2460832.6857407 20.1408 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
Clear- Other_Other 2025-05-24 23:30:00 - 2025-06-24 21:07:00 2460820.4791667 - 2460851.3798611 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
497989 2025-06-24 21:07:00 2460851.3798611 17 VegaMag Clear- Other_Other G.CORTINI
497988 2025-05-24 23:30:00 2460820.4791667 19 VegaMag Clear- Other_Other [Last non detection] G.CORTINI REPORTS THE DISCOVERY OF A PSN IN UGC 4973. MY PAST IMAGE OF THE HOST GALAXY TAKEN ON 2025 05.24.98 SHOWED NOTHING IN THE POSITION OF THE SUSPECT UNTIL MAG. +19.0. THE SUSPECT DOES NOT APPEAR ON POSS II RED AND BLUE PLATES. NO KNOWN MINOR PLANET IS MARKED IN THE POSITION OF THE SUSPECY AT THE TIME OF THE DISCOVERY. THE DISCOVERY INSTRUMENT IS SCH. - CASS. REFLECTOR 0.35 m. F/5.6.
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
260212 2025-06-27 04:47:53 Fritz Sam Rose (Caltech),Jesper Sollerman (SU),Christoffer Fremling (Caltech) et al. ZTF ZTF 09:22:40.158 +60:52:06.88 2025-06-26 03:59:28.000 17.8289 r-ZTF PSN ZTF25aaxocya ZTF N
259953 2025-06-24 21:24:43 Giancarlo Cortini Giancarlo Cortini et al. 09:22:40.240 +60:52:06.58 2025-06-24 21:07:00.000 17 Clear- PSN UGC 4973 G.CORTINI REPORTS THE DISCOVERY OF A PSN IN UGC 4973. MY PAST IMAGE OF THE HOST GALAXY TAKEN ON 2025 05.24.98 SHOWED NOTHING IN THE POSITION OF THE SUSPECT UNTIL MAG. +19.0. THE SUSPECT DOES NOT APPEAR ON POSS II RED AND BLUE PLATES. NO KNOWN MINOR PLANET IS MARKED IN THE POSITION OF THE SUSPECY AT THE TIME OF THE DISCOVERY. 2025TNSTR2379....1C N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21461 2025-07-02 23:31:16 ZTF_Bot1 K. Das, S. Covarrubias, M. Kasliwal (Caltech) on behalf of the ZTF CATS150 collaboration ZTF SN IIb 0.02588 1 ZTF 2025TNSCR2530....1D
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
21461 2025-06-28 00:00:00 Keck1 / LRIS 300 Kaustav Kashyap Das, Wynn Jacobson-Galán Kaustav Kashyap Das ZTF tns_2025ovr_2025-06-28_00-00-00_Keck1_LRIS_ZTF.ascii Object
21434 2025-06-30 09:50:42 Claudio Balcon Claudio Balcon (Belluno A.O. ISSP) None SN II 0.025886 1 GELATO Harutyunyan et al., 2008, A&A, 488, 383 (gelato@tng.iac.es) suggests that this low S/N spectrum resembles that of a type II supernova at the redshift of the host galaxy, value from NED. A young type IIb supernova seems possible. 2025TNSCR2500....1B
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
21434 2025-06-28 21:33:00 BL41 / FOSC-E5535 3600 Balcon Balcon None tns_2025ovr_2025-06-28_21-33-00_BL41_FOSC-E5535_None.dat tns_2025ovr_2025-06-28_21-33-00_BL41_FOSC-E5535_None.fit Object
21419 2025-06-28 06:43:30 Willem Hoogendam Willem Hoogendam (IfA/Hawaii), on behalf of SCAT SCAT SN Ia 0.025886 1 SCAT SNID best matches to the SN Ia 2003cg—Redshift from NED. Claudio Balcon is gratefully acknowledged for requesting this classification spectrum. 2025TNSCR2460....1H
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
21419 2025-06-27 00:00:00 UH88 / SNIFS 600 Hoogendam Hoogendam SCAT tns_2025ovr_2025-06-27_UH88_SNIFS_SCAT.dat Object

Comments

TNS
System

Fri, 06/27/2025 - 04:47

Object coordinates updated

Object coordinates updated according to AT-report 260212 of Group ZTF
Previous RA, DEC: 09:22:40.240, +60:52:06.58 (140.667667, +60.868494)
Updated RA, DEC: 09:22:40.158, +60:52:06.88 (140.6673268, +60.8685771)