RA/DEC (2000)
10:23:49.563 -20:57:29.52
155.956511667 -20.9582
Type
SN Ia
Redshift
0.026
Discovery ReportClassification Report
Related AstroNotes: 2026-134, 2026-137
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2026-05-08 05:02:24.000
TNS AT
Y
Public
Y
Host Name
MCG -03-27-007
Host Redshift
0.026332
Discovery Mag
16.9
Filter
g-Sloan
Reporter/s
K. Z. Stanek, C. Lenhart, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026lru - 2026-05-16 00:12:15 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

 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ASASSN-4_Leavitt_g
 ▌ATLAS-HKO_ATLAS-02_orange
 ▌ASASSN-2_Cassius_g
   
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
23728 2026-05-16 00:12:15 ESO-NTT / EFOSC2-NTT 600 J. Khaulsay,J. Quirola-Vasquez C. Aster ePESSTO+ tns_2026lru_2026-05-16_00-12-15_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2026lru_2026-05-16_00-12-15_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-05-03 03:13:30 - 2026-05-03 03:13:30 2461163.63437 - 2461163.63437 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
583711 2026-05-03 03:13:30 2461163.63437 18.425 0.185 18.86 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
g-Sloan ASASSN-4_Leavitt 2026-05-08 05:02:24 - 2026-05-08 05:02:24 2461168.71 - 2461168.71 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
580488 2026-05-08 05:02:24 2461168.71 16.9 ABMag g-Sloan ASASSN-4_Leavitt
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-05-02 08:32:58 - 2026-05-02 08:32:58 2461162.85623 - 2461162.85623 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
583710 2026-05-02 08:32:58 2461162.85623 18.46 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
g-Sloan ASASSN-2_Cassius 2026-05-04 02:52:48 - 2026-05-04 02:52:48 2461164.62 - 2461164.62 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
580487 2026-05-04 02:52:48 2461164.62 17.7 ABMag g-Sloan ASASSN-2_Cassius [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
304476 2026-05-18 22:04:24 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 10:23:49.563 -20:57:29.52 2026-05-03 03:13:29.568 18.425 orange-ATLAS PSN ATLAS26fzz ATLAS N
302738 2026-05-08 21:18:59 Krzysztof Stanek K. Z. Stanek, C. Lenhart, for the ASAS-SN team ASAS-SN ASAS-SN 10:23:49.418 -20:57:25.38 2026-05-08 05:02:24.000 16.9 g-Sloan PSN MCG -03-27-007 ASASSN-26df ASAS-SN Present in several epochs 2026TNSTR1987....1S N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23725 2026-05-16 16:17:17 ePESSTOplus_Bot1 J. Khaulsay,J. Quirola-Vasquez, C. Aster, O. Yaron on behalf of ePESSTO+ ePESSTO+ SN Ia 0.026 1 ePESSTO+ 2026TNSCR2134....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
23728 2026-05-16 00:12:15 ESO-NTT / EFOSC2-NTT 600 J. Khaulsay,J. Quirola-Vasquez C. Aster ePESSTO+ tns_2026lru_2026-05-16_00-12-15_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2026lru_2026-05-16_00-12-15_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Mon, 05/18/2026 - 22:04

Object coordinates updated

Object coordinates updated according to AT-report 304476 of Group ATLAS
Previous RA, DEC: 10:23:49.418, -20:57:25.38 (155.955908, -20.95705)
Updated RA, DEC: 10:23:49.563, -20:57:29.52 (155.956511667, -20.9582)

TNS
System

Sat, 05/09/2026 - 13:08

Object coordinates updated

Object coordinates updated according to AT-report 302738 of Group ASAS-SN
Previous RA, DEC: 10:23:49.418, -20:57:25.38 (155.95591, -20.95705)
Updated RA, DEC: 10:23:49.418, -20:57:25.38 (155.955908, -20.95705)