RA/DEC (2000)
02:25:43.241 +37:14:18.69
36.4301721253 +37.2385258183
Type
SN IIn
Redshift
0.036902
Discovery ReportClassification Report
Reporting Group
SNHunt
Discovering Data Source
CRTS
Discovery Date
2025-12-08 08:05:59.000
TNS AT
Y
Public
Y
Host Name
UGC 1882
Host Redshift
0.0369
Discovery Mag
19.5
Filter
V-crts-CRTS
Reporter/s
Michele Mazzucato on behalf of SNHunt
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025agby - 2025-12-16 10:35:00 Keck2 / KCWI (UCSC)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

 ▌P48_ZTF-Cam_r
 ▌PS1_GPC1_g
 ▌Other_Other_V-crts
   
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
22679 2025-12-16 10:35:00 Keck2 / KCWI 1200 Ravjit Kaur (UCSC), Ryan Foley (UCSC) Kyle Davis (UCSC) UCSC tns_2025agby_2025-12-16_10-35-00_Keck2_KCWI_UCSC.flm Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2025-12-06 07:08:00 - 2025-12-12 04:42:19 2461015.7972222 - 2461021.6960532 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
537922 2025-12-12 04:42:19 2461021.6960532 19.9452 0.169729 ABMag r-ZTF P48_ZTF-Cam
537921 2025-12-08 05:15:00 2461017.71875 20.2116 0.21307 ABMag r-ZTF P48_ZTF-Cam
537920 2025-12-06 07:08:00 2461015.7972222 19.6597 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-P1 PS1_GPC1 2025-12-11 06:19:08 - 2025-12-11 06:19:08 2461020.76329 - 2461020.76329 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
537850 2025-12-11 06:19:08 2461020.76329 20.03 0.2 21 ABMag g-P1 PS1_GPC1 27 Robot
V-crts-CRTS Other_Other 2025-11-11 07:35:19 - 2025-12-08 08:05:59 2460990.8161921 - 2461017.8374884 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
536874 2025-12-08 08:05:59 2461017.8374884 19.5 VegaMag V-crts-CRTS Other_Other MLS 10K CCD.
536873 2025-11-11 07:35:19 2460990.8161921 21 VegaMag V-crts-CRTS Other_Other [Last non detection] MLS 10K CCD.
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
280181 2025-12-12 05:35:13 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 02:25:43.240 +37:14:18.87 2025-12-08 05:15:00.000 20.2116 r-ZTF PSN ZTF25acgibks ZTF N
280153 2025-12-11 22:16:11 YSE_Bot1 D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al. YSE Pan-STARRS 02:25:43.241 +37:14:18.69 2025-12-11 06:19:08.256 20.03 g-P1 PSN PS25inw Pan-STARRS N
279714 2025-12-08 17:23:07 Andrew Drake Michele Mazzucato on behalf of SNHunt SNHunt CRTS 02:25:43.248 +37:14:18.96 2025-12-08 08:05:59.000 19.5 V-crts-CRTS PSN UGC 1882 CRTS 2025TNSTR4879....1M N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22678 2025-12-22 20:45:51 Kyle Davis Ravjit Kaur (UCSC), Kyle Davis (UCSC), Ryan Foley (UCSC) UCSC SN IIn 0.036902 1 UCSC The spectrum has several strong, narrow (FWHM ~ 600 km/s) H emission lines. We note that the object is offset from its host galaxy by ~24 kpc in projection, and at an intermediate luminosity between what is typical for SNe IIn and LBV-like outbursts. Follow-up observations are encouraged. 2025TNSCR5134....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
22679 2025-12-16 10:35:00 Keck2 / KCWI 1200 Ravjit Kaur (UCSC), Ryan Foley (UCSC) Kyle Davis (UCSC) UCSC tns_2025agby_2025-12-16_10-35-00_Keck2_KCWI_UCSC.flm Object

Comments

TNS
System

Thu, 12/11/2025 - 22:16

Object coordinates updated

Object coordinates updated according to AT-report 280153 of Group Pan-STARRS
Previous RA, DEC: 02:25:43.248, +37:14:18.96 (36.4302, +37.2386)
Updated RA, DEC: 02:25:43.241, +37:14:18.69 (36.4301721253, +37.2385258183)