RA/DEC (2000)
22:40:28.307 -12:58:19.32
340.11794504 -12.97203333
Type
SN Ia-91T-like
Redshift
0.06
Discovery ReportClassification Report
Related AstroNotes: 2025-156
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-05-06 02:32:04.704
TNS AT
Y
Public
Y
Discovery Mag
18.967
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)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025kdy - 2025-05-25 09:28:24 ESO-NTT / EFOSC2-NTT (ePESSTO+)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

 ▌GOTO-S_GOTO-4_L
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-STH_ATLAS-03_cyan
 ▌P48_ZTF-Cam_r
 ▌ATLAS-HKO_ATLAS-02_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
21129 2025-05-25 09:28:24 ESO-NTT / EFOSC2-NTT 800 Stefano Pio Cosentino, Callum Francis Aster Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee ePESSTO+ tns_2025kdy_2025-05-25_09-28-24_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025kdy_2025-05-25_09-28-24_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-04-19 19:15:48 - 2025-04-19 19:15:48 2460785.302639 - 2460785.302639 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
488764 2025-04-19 19:15:48 2460785.302639 19.1 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
L-GOTO GOTO-S_GOTO-3 2025-05-17 18:32:37 - 2025-05-17 18:32:37 2460813.27265 - 2460813.27265 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
488765 2025-05-17 18:32:37 2460813.27265 18.07 0.1 ABMag L-GOTO GOTO-S_GOTO-3 180
cyan-ATLAS ATLAS-STH_ATLAS-03 2025-05-06 02:32:05 - 2025-05-06 02:32:05 2460801.60561 - 2460801.60561 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
487395 2025-05-06 02:32:05 2460801.60561 18.967 0.175 19.12 ABMag cyan-ATLAS ATLAS-STH_ATLAS-03 30 Robot
r-ZTF P48_ZTF-Cam 2025-05-31 11:00:58 - 2025-07-07 11:05:16 2460826.9590046 - 2460863.9619907 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
501342 2025-07-07 11:05:16 2460863.9619907 19.8547 0.167857 ABMag r-ZTF P48_ZTF-Cam
501341 2025-05-31 11:00:58 2460826.9590046 18.6396 0.185126 ABMag r-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-05-05 14:10:38 - 2025-05-05 14:10:38 2460801.09072 - 2460801.09072 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
487394 2025-05-05 14:10:38 2460801.09072 18.46 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
w-P1 PS1_GPC1 2025-06-23 13:10:05 - 2025-06-23 13:10:05 2460850.04867 - 2460850.04867 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502223 2025-06-23 13:10:05 2460850.04867 19.6 0.06 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
262342 2025-07-12 20:34:41 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 22:40:28.307 -12:58:19.32 2025-06-23 13:10:05.088 19.6 w-P1 PSN PS25fbg Pan-STARRS N
261804 2025-07-07 14:58:51 Fritz Daniel Perley (LJMU),Christoffer Fremling (Caltech),Theophile du Laz (Caltech) on behalf of ZTF et al. ZTF ZTF 22:40:28.303 -12:58:19.31 2025-05-31 11:00:57.997 18.6396 r-ZTF PSN ZTF25aatjncm ZTF N
255268 2025-05-17 20:31:20 GOTO_bot A. Kumar,K. Ackley,M. Dyer et al. GOTO GOTO 22:40:28.333 -12:58:19.63 2025-05-17 18:32:36.960 18.07 L-GOTO Other GOTO25csq GOTO N
254558 2025-05-08 09:50:11 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 22:40:28.305 -12:58:19.36 2025-05-06 02:32:04.704 18.967 cyan-ATLAS PSN ATLAS25ewc ATLAS 2025TNSTR1706....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
21129 2025-05-25 16:22:09 ePESSTOplus_Bot1 Stefano Pio Cosentino, Callum Francis Aster, Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, A. Horowicz on behalf of ePESSTO+ ePESSTO+ SN Ia-91T-like 0.06 1 ePESSTO+ 2025TNSCR1963....1C
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
21129 2025-05-25 09:28:24 ESO-NTT / EFOSC2-NTT 800 Stefano Pio Cosentino, Callum Francis Aster Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee ePESSTO+ tns_2025kdy_2025-05-25_09-28-24_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025kdy_2025-05-25_09-28-24_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Sat, 07/12/2025 - 20:34

Object coordinates updated

Object coordinates updated according to AT-report 262342 of Group Pan-STARRS
Previous RA, DEC: 22:40:28.303, -12:58:19.31 (340.1179298, -12.9720301)
Updated RA, DEC: 22:40:28.307, -12:58:19.32 (340.11794504, -12.97203333)

TNS
System

Mon, 07/07/2025 - 14:58

Object coordinates updated

Object coordinates updated according to AT-report 261804 of Group ZTF
Previous RA, DEC: 22:40:28.305, -12:58:19.36 (340.117935625, -12.97204375)
Updated RA, DEC: 22:40:28.303, -12:58:19.31 (340.1179298, -12.9720301)