RA/DEC (2000)
21:11:25.332 +14:14:29.57
317.85555 +14.241547
Type
SN Ia
Redshift
0.03
Related AstroNotes: 2026-198
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2026-06-07 05:45:36.000
TNS AT
Y
Public
Y
Host Name
WISEA J211125.35+141429.9
Host Redshift
0.029474
Discovery Mag
16.5
Filter
g-Sloan
Reporter/s
K. Z. Stanek, C. Lenhart, for the ASAS-SN team

Spectra

 SN_2026osq - 2026-06-11 10:32:04 UH88 / SNIFS (SCAT)z=
Show H at z=vexp= km/s
Show He at z=vexp= km/s
Show He II at z=vexp= km/s
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Show N II at z=vexp= km/s
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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
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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

 BG4_BlackGEM-Cam4_BG-q
 BG3_BlackGEM-Cam3_BG-q
 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
24012 2026-06-11 10:32:04 UH88 / SNIFS 1800 Kong Kong SCAT tns_2026osq_2026-06-12_UH88_SNIFS_SCAT.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
BG-q-BlackGem BG4_BlackGEM-Cam4 2026-06-23 08:34:47 - 2026-06-23 08:34:47 2461214.8574884 - 2461214.8574884 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
594162 2026-06-23 08:34:47 2461214.8574884 17.19 0.03 20.42 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
BG-q-BlackGem BG3_BlackGEM-Cam3 2026-05-12 09:37:04 - 2026-05-12 09:37:04 2461172.9007407 - 2461172.9007407 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
594161 2026-05-12 09:37:04 2461172.9007407 20.36 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
g-Sloan ASASSN-2_Cassius 2026-06-03 05:31:12 - 2026-06-07 05:45:36 2461194.73 - 2461198.74 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
590521 2026-06-07 05:45:36 2461198.74 16.5 ABMag g-Sloan ASASSN-2_Cassius
590520 2026-06-03 05:31:12 2461194.73 16.9 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
309844 2026-06-23 11:53:02 BlackGEM_Bot1 L. Landsberg, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 21:11:25.332 +14:14:29.57 2026-06-23 08:34:47.000 17.19 BG-q-BlackGem PSN BGEM J211125.33+141429.6 BlackGEM N
307841 2026-06-09 12:57:53 Krzysztof Stanek K. Z. Stanek, C. Lenhart, for the ASAS-SN team ASAS-SN ASAS-SN 21:11:25.313 +14:14:30.44 2026-06-07 05:45:36.000 16.5 g-Sloan PSN WISEA J211125.35+141429.9 ASASSN-26dr ASAS-SN Present in several epochs, on the rise, nuclear source, so could also be a TDE 2026TNSTR2402....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
24006 2026-06-11 11:59:42 Miranda Kong Miranda Kong SCAT SN Ia 0.03 1 SCAT 2026TNSCR2463....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
24012 2026-06-11 10:32:04 UH88 / SNIFS 1800 Kong Kong SCAT tns_2026osq_2026-06-12_UH88_SNIFS_SCAT.dat Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 309844 of Group BlackGEM
Previous RA, DEC: 21:11:25.313, +14:14:30.44 (317.85547, +14.24179)
Updated RA, DEC: 21:11:25.332, +14:14:29.57 (317.85555, +14.241547)