RA/DEC (2000)
10:29:36.432 -24:06:33.61
157.401800538 -24.1093360392
Type
SN IIn
Redshift
0.012689
Related AstroNotes: 2025-153, 2025-154
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-05-22 01:05:21.696
TNS AT
Y
Public
Y
Discovery Mag
17.001
Filter
cyan-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)

Spectra

 SN_2025kzr - 2025-05-26 06:38:31 FTN / FLOYDS-N (Global SN Project)z=
 SN_2025kzr - 2025-05-22 01:05:22 Lesedi / Mookodi (BlackGEM)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-CHL_ATLAS-04_cyan
 ATLAS-STH_ATLAS-03_orange
 PS1_GPC1_w
   
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
21179 2025-05-26 06:38:31 FTN / FLOYDS-N 900 LCO Yuan Qi Ni Global SN Project tns_2025kzr_2025-05-26_06-38-31_FTN_FLOYDS-N_Global_SN_Project.txt Object
21115 2025-05-22 01:05:22 Lesedi / Mookodi 600 N. Erasmus, S. Potter, C. van Gend, H. Worters, S. Chandra, D. Cunnama, M. Hlakola, P. Rabe, R. Julie (all SAAO) Simon de Wet BlackGEM tns_2025kzr_2025-05-22_01-05-22_Lesedi_Mookodi_BlackGEM.csv Object The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager [1] as part of the “IO” rapid follow-up program [2]. The spectrum was taken with the widest (4") slit width which resulted in a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-05-22 01:05:22 - 2025-05-22 01:05:22 2460817.54539 - 2460817.54539 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
489631 2025-05-22 01:05:22 2460817.54539 17.001 0.038 19.47 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-05-19 19:47:30 - 2025-05-19 19:47:30 2460815.32465 - 2460815.32465 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
489630 2025-05-19 19:47:30 2460815.32465 17.87 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
w-P1 PS1_GPC1 2025-03-29 07:37:01 - 2025-03-29 07:37:01 2460763.81737 - 2460763.81737 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490153 2025-03-29 07:37:01 2460763.81737 19.84 0.05 22 ABMag w-P1 PS1_GPC1 45 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
255970 2025-05-22 19:07:43 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 10:29:36.432 -24:06:33.61 2025-03-29 07:37:00.768 19.84 w-P1 PSN PS25cup Pan-STARRS N
255730 2025-05-22 07:31:15 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 10:29:36.455 -24:06:33.65 2025-05-22 01:05:21.696 17.001 cyan-ATLAS PSN ATLAS25fef ATLAS 2025TNSTR1890....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21179 2025-05-29 18:35:59 Yuan Qi Ni Chris Ni (KITP/LCO), Moira Andrews, Joseph Farah, Kathryn Wynn, D. Andrew Howell, Curtis McCully Global SN Project SN IIn 0.012689 1 Global SN Project We report the classification of SN 2025kzr as SN IIn. The spectrum shows a best match to Ia norm SN 1998S from SNID (Blondin & Tonry 2007, ApJ, 666, 1024) 12.5 days before peak (at z = 0.014+-0.04). The object redshift is acquired from the nearby host of ESO 501-G001 (z=0.012689, value from NED). Additional follow-up is encouraged. 2025TNSCR2027....1N
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
21179 2025-05-26 06:38:31 FTN / FLOYDS-N 900 LCO Yuan Qi Ni Global SN Project tns_2025kzr_2025-05-26_06-38-31_FTN_FLOYDS-N_Global_SN_Project.txt Object
21115 2025-05-23 12:54:34 Simon de Wet Simon deWet (DTU Space), Giorgos Leloudas (DTU Space), Nicolas Erasmus (SAAO) BlackGEM SN 0.012 1 BlackGEM The spectrum shows strong flash-ionised features of C III, He II and He I. We refrain from assigning a supernova sub-type (see associated astronote). 2025TNSCR1926....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
21115 2025-05-22 01:05:22 Lesedi / Mookodi 600 N. Erasmus, S. Potter, C. van Gend, H. Worters, S. Chandra, D. Cunnama, M. Hlakola, P. Rabe, R. Julie (all SAAO) Simon de Wet BlackGEM tns_2025kzr_2025-05-22_01-05-22_Lesedi_Mookodi_BlackGEM.csv Object The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager [1] as part of the “IO” rapid follow-up program [2]. The spectrum was taken with the widest (4") slit width which resulted in a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 255970 of Group Pan-STARRS
Previous RA, DEC: 10:29:36.455, -24:06:33.65 (157.40189625, -24.1093475)
Updated RA, DEC: 10:29:36.432, -24:06:33.61 (157.401800538, -24.1093360392)