RA/DEC (2000)
11:27:55.395 +53:00:09.32
171.9808105 +53.0025898
Type
SN II
Redshift
0.02134
Discovery ReportClassification Report
Related AstroNotes: 2026-24
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2026-02-06 10:38:13.344
TNS AT
Y
Public
Y
Discovery Mag
18.766
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland (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, P. J. Broda, A. J. Smith (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (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_2026chx - 2026-02-13 12:26:58 FTN / FLOYDS-N (Global SN Project)z=
 ▌SN_2026chx - 2026-02-08 20:17:54 Lijiang-2.4m / YFOSC (YNTS)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

 ▌WFST_WFST-WFC_g
 ▌LAST_LAST-Cam_Clear
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌ATLAS-HKO_ATLAS-02_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
22986 2026-02-13 12:26:58 FTN / FLOYDS-N 3600 LCO/GSP Joseph Farah Global SN Project tns_2026chx_2026-02-13_12-26-58_FTN_FLOYDS-N_Global_SN_Project.ascii Object
22989 2026-02-08 20:17:54 Lijiang-2.4m / YFOSC Luhan Li Shiyang Dong YNTS tns_2026chx_2026-02-08_20-17-54.107_Lijiang-2.4m_YFOSC_YNTS.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-WFST WFST_WFST-WFC 2026-01-31 15:50:24 - 2026-02-04 17:52:48 2461072.16 - 2461076.245 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
568698 2026-02-04 17:52:48 2461076.245 19.11 0.03 ABMag g-WFST WFST_WFST-WFC 30
568697 2026-01-31 15:50:24 2461072.16 20.44 ABMag g-WFST WFST_WFST-WFC 30 [Last non detection]
Clear- LAST_LAST-Cam 2026-01-29 02:43:05 - 2026-02-11 22:10:04 2461069.61325 - 2461083.42366 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
557751 2026-02-11 22:10:04 2461083.42366 18.77 ABMag Clear- LAST_LAST-Cam 400
557750 2026-01-29 02:43:05 2461069.61325 20.61 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
r-ZTF P48_ZTF-Cam 2026-02-22 07:24:09 - 2026-02-22 07:24:09 2461093.8084375 - 2461093.8084375 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
559995 2026-02-22 07:24:09 2461093.8084375 18.5507 0.128218 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2026-02-08 11:52:54 - 2026-02-22 08:14:39 2461079.9950694 - 2461093.8435069 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
559996 2026-02-22 08:14:39 2461093.8435069 19.0577 0.107049 ABMag g-ZTF P48_ZTF-Cam
559994 2026-02-08 11:52:54 2461079.9950694 20.0093 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2026-02-06 10:38:13 - 2026-02-06 10:38:13 2461077.94321 - 2461077.94321 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
556359 2026-02-06 10:38:13 2461077.94321 18.766 0.154 19.21 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-02-05 12:18:18 - 2026-02-05 12:18:18 2461077.01271 - 2461077.01271 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
556358 2026-02-05 12:18:18 2461077.01271 18.95 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 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
296708 2026-03-20 10:38:59 WFST_SN Zelin Xu, Dezheng Meng, Ji-an Jiang et al. WFST WFST 11:27:55.370 +53:00:09.24 2026-02-04 17:52:48.000 19.11 g-WFST PSN WFST260204adysj WFST N
292188 2026-02-22 10:00:05 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 11:27:55.395 +53:00:09.32 2026-02-22 07:24:09.000 18.5507 r-ZTF PSN ZTF26aahchgw ZTF N
290944 2026-02-12 01:54:10 LAST_Bot1 R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS) et al. LAST LAST 11:27:55.433 +53:00:09.86 2026-02-11 22:10:04.224 18.77 Clear- PSN LAST N
290205 2026-02-07 18:38:21 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 11:27:55.440 +53:00:09.08 2026-02-06 10:38:13.344 18.766 orange-ATLAS PSN ATLAS26bkn ATLAS 2026TNSTR.518....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
22988 2026-02-16 09:30:56 Luhan Li Bo Wang, Luhan Li, Shiyang Dong, Xinjie Luo, Dongdong Liu (YNAO) YNTS SN II 1 YNTS 2026TNSCR.670....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
22989 2026-02-08 20:17:54 Lijiang-2.4m / YFOSC Luhan Li Shiyang Dong YNTS tns_2026chx_2026-02-08_20-17-54.107_Lijiang-2.4m_YFOSC_YNTS.dat Object
22985 2026-02-16 01:13:35 Joseph Farah Joseph Farah (UCSB/LCO), Moira Andrews, Kathryn Wynn, D. Andrew Howell, Curtis McCully, Jake Ridenbaugh Global SN Project SN II 0.02134 1 Global SN Project We report the classification of SN 2026chx as SN II. The spectrum shows a best match to SN II at approximately 3 days after peak light both based on the presence of a broad H-alpha line, and using SNID (Blondin & Tonry 2007, ApJ, 666, 1024). SNID finds a best-fit redshift of z~0.021, which is consistent with the apparent associated host LEDA 2429296 (simbad:coo=171.9810d53.0022d,rad=2 arcmin) at z~0.02134. Additional follow-up is encouraged. 2026TNSCR.668....1F
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
22986 2026-02-13 12:26:58 FTN / FLOYDS-N 3600 LCO/GSP Joseph Farah Global SN Project tns_2026chx_2026-02-13_12-26-58_FTN_FLOYDS-N_Global_SN_Project.ascii Object

Comments

TNS
System

Sun, 02/22/2026 - 10:00

Object coordinates updated

Object coordinates updated according to AT-report 292188 of Group ZTF
Previous RA, DEC: 11:27:55.440, +53:00:09.08 (171.981, +53.0025225)
Updated RA, DEC: 11:27:55.395, +53:00:09.32 (171.9808105, +53.0025898)