RA/DEC (2000)
03:44:53.043 +04:03:01.35
56.2210114 +4.0503755
Type
SN Ia
Redshift
0.037
Related AstroNotes: 2025-252
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-01 14:10:48.576
TNS AT
Y
Public
Y
Discovery Mag
18.164
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), M. R. Alarcón, J. Licandro, P. Nichita (IAC), 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_2025sxk - 2025-08-11 09:50:54 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

 LAST_LAST-Cam_Clear
 GOTO-S_GOTO-4_L
 GOTO-N_GOTO-1_L
 P48_ZTF-Cam_r
 ATLAS-HKO_ATLAS-02_orange
 ATLAS-HKO_ATLAS-02_cyan
   
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
21753 2025-08-11 09:50:54 ESO-NTT / EFOSC2-NTT 600 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025sxk_2025-08-11_09-50-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025sxk_2025-08-11_09-50-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2025-09-12 02:03:36 - 2025-09-16 00:01:29 2460930.58583 - 2460934.50103 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
517580 2025-09-16 00:01:29 2460934.50103 19.56 ABMag Clear- LAST_LAST-Cam 380
517579 2025-09-12 02:03:36 2460930.58583 19.28 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
L-GOTO GOTO-S_GOTO-4 2025-07-13 19:42:48 - 2025-07-13 19:42:48 2460870.321392 - 2460870.321392 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508150 2025-07-13 19:42:48 2460870.321392 18.8 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-08-11 05:27:57 - 2025-08-11 05:27:57 2460898.727744 - 2460898.727744 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508151 2025-08-11 05:27:57 2460898.727744 17.29 0.08 ABMag L-GOTO GOTO-N_GOTO-1 180
r-ZTF P48_ZTF-Cam 2025-08-02 10:53:50 - 2025-08-17 09:47:17 2460889.9540509 - 2460904.9078356 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
509505 2025-08-17 09:47:17 2460904.9078356 17.3334 0.0158976 ABMag r-ZTF P48_ZTF-Cam
509504 2025-08-02 10:53:50 2460889.9540509 18.0035 0.080002 ABMag r-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-07-26 15:00:56 - 2025-07-26 15:00:56 2460883.12565 - 2460883.12565 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
506739 2025-07-26 15:00:56 2460883.12565 18.42 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
cyan-ATLAS ATLAS-HKO_ATLAS-02 2025-08-01 14:10:49 - 2025-08-01 14:10:49 2460889.09084 - 2460889.09084 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
506740 2025-08-01 14:10:49 2460889.09084 18.164 0.066 19.36 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 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
270254 2025-09-16 03:48:45 LAST_Bot1 E. O. Ofek (WIS),R. Konno (WIS),E. A. Zimmerman (WIS) et al. LAST LAST 03:44:53.004 +04:03:01.49 2025-09-16 00:01:28.992 19.56 Clear- PSN LAST N
266168 2025-08-17 10:53:33 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 03:44:53.043 +04:03:01.35 2025-08-02 10:53:49.997 18.0035 r-ZTF PSN ZTF25abgviwu ZTF N
265493 2025-08-12 06:42:04 GOTO_bot G. Ramsay,K. Ackley,M. Dyer et al. GOTO GOTO 03:44:53.039 +04:03:01.16 2025-08-11 05:27:56.736 17.29 L-GOTO Other GOTO25fsj GOTO N
264628 2025-08-01 20:42:24 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 03:44:53.051 +04:03:01.18 2025-08-01 14:10:48.576 18.164 cyan-ATLAS PSN ATLAS25itj ATLAS 2025TNSTR3022....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
21753 2025-08-11 16:13:54 ePESSTOplus_Bot1 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani, Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter, A. Horowicz on behalf of ePESSTO+ ePESSTO+ SN Ia 0.037 1 ePESSTO+ 2025TNSCR3147....1v
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
21753 2025-08-11 09:50:54 ESO-NTT / EFOSC2-NTT 600 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025sxk_2025-08-11_09-50-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025sxk_2025-08-11_09-50-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 266168 of Group ZTF
Previous RA, DEC: 03:44:53.051, +04:03:01.18 (56.221047, +4.050327)
Updated RA, DEC: 03:44:53.043, +04:03:01.35 (56.2210114, +4.0503755)