RA/DEC (2000)
00:59:08.677 -74:28:54.86
14.7861547059 -74.4819058824
Type
SN Ia
Redshift
0.05
Discovery ReportClassification Report
Related AstroNotes: 2025-290
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-09-10 04:52:52.896
TNS AT
Y
Public
Y
Discovery Mag
18.187
Filter
orange-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)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025xli - 2025-09-22 08:31:54 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

 ▌GOTO-S_GOTO-4_L
 ▌ATLAS-CHL_ATLAS-04_orange
   
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
22073 2025-09-22 08:31:54 ESO-NTT / EFOSC2-NTT 300 Ben Warwick, Anwesha Sahu Ben Godson, Joe Lyman ePESSTO+ tns_2025xli_2025-09-22_08-31-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025xli_2025-09-22_08-31-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-09-03 13:48:00 - 2025-09-23 14:29:37 2460922.074999 - 2460942.103899 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519448 2025-09-23 14:29:37 2460942.103899 17.13 0.02 ABMag L-GOTO GOTO-S_GOTO-4 180
519447 2025-09-03 13:48:00 2460922.074999 19.3 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-09-07 06:08:36 - 2025-09-10 04:52:53 2460925.75597 - 2460928.70339 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
517028 2025-09-10 04:52:53 2460928.70339 18.187 0.148 18.55 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
517027 2025-09-07 06:08:36 2460925.75597 17.28 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
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
271099 2025-09-24 00:52:21 GOTO_bot D. O'Neill,G. Ramsay,K. Ackley et al. GOTO GOTO 00:59:08.695 -74:28:54.82 2025-09-23 14:29:36.960 17.13 L-GOTO Other GOTO25hoo GOTO N
269987 2025-09-14 17:59:04 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 00:59:08.677 -74:28:54.86 2025-09-10 04:52:52.896 18.187 orange-ATLAS PSN ATLAS25lgd ATLAS 2025TNSTR3686....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
22073 2025-09-22 13:36:22 ePESSTOplus_Bot1 Ben Warwick, Anwesha Sahu, Ben Godson, Joe Lyman, A. Horowicz on behalf of ePESSTO+ ePESSTO+ SN Ia 0.05 1 ePESSTO+ 2025TNSCR3813....1W
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
22073 2025-09-22 08:31:54 ESO-NTT / EFOSC2-NTT 300 Ben Warwick, Anwesha Sahu Ben Godson, Joe Lyman ePESSTO+ tns_2025xli_2025-09-22_08-31-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025xli_2025-09-22_08-31-54_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments