RA/DEC (2000)
17:46:09.818 -61:19:51.60
266.540906667 -61.331
Type
SN Ic
Redshift
0.006
Discovery ReportClassification Report
Related AstroNotes: 2026-94
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2026-04-02 08:40:31.872
TNS AT
Y
Public
Y
Discovery Mag
18.325
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_2026icy - 2026-04-06 07:40:48 Magellan-Baade / IMACS (POISE)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
 ▌ATLAS-STH_ATLAS-03_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
23459 2026-04-06 07:40:48 Magellan-Baade / IMACS 1500 C. R. Burns (Carnegie), E. Y. Hsiao (FSU) N. Morrell (LCO) POISE tns_2026icy_2461136.82_Magellan-Baade_IMACS_POISE.dat tns_2026icy_2461136.82_Magellan-Baade_IMACS_POISE.fits Object The spectrum consists of two 1500-second exposures.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-03-11 18:15:28 - 2026-04-11 18:49:45 2461111.260736 - 2461142.284554 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
574911 2026-04-11 18:49:45 2461142.284554 17.18 0.03 ABMag L-GOTO GOTO-S_GOTO-4 135
574910 2026-03-11 18:15:28 2461111.260736 19.8 ABMag L-GOTO GOTO-S_GOTO-4 135 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-04-02 08:40:32 - 2026-04-02 08:40:32 2461132.86148 - 2461132.86148 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
571870 2026-04-02 08:40:32 2461132.86148 18.325 0.152 18.63 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2026-04-01 02:17:35 - 2026-04-01 02:17:35 2461131.59554 - 2461131.59554 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
571869 2026-04-01 02:17:35 2461131.59554 18.87 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 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
299953 2026-04-13 10:15:38 GOTO_bot G. Ramsay, J. Lyman, K. Ackley et al. GOTO GOTO 17:46:09.852 -61:19:51.12 2026-04-11 18:49:45.120 17.18 L-GOTO Other GOTO26dbz GOTO N
298283 2026-04-02 12:50:53 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 17:46:09.818 -61:19:51.60 2026-04-02 08:40:31.872 18.325 orange-ATLAS PSN ATLAS26drb ATLAS 2026TNSTR1398....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
23457 2026-04-12 07:45:31 Maximilian Stritzinger M. Stritzinger (Aarhus), N. Morrell (LCO), H. Xiao, E. Hsiao (FSU), C. Burns (Carnegie), C. Pfeffer, W. Hoogendam, K. Medler, C. Ashall (Hawaii) POISE SN Ic 0.006 1 POISE SNID-SAGE yields good matches at z ≈ 0.006 to the Type Ic supernova 2004aw and the broad-lined Type Ic supernova 2017dcc, with phases ranging from approximately one week before maximum to maximum light (Stoppa & Smartt 2026, arXiv:2603.28741). We note that the current ATLAS light curve indicates that the object is still rising toward maximum. 2026TNSCR1558....1S
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
23459 2026-04-06 07:40:48 Magellan-Baade / IMACS 1500 C. R. Burns (Carnegie), E. Y. Hsiao (FSU) N. Morrell (LCO) POISE tns_2026icy_2461136.82_Magellan-Baade_IMACS_POISE.dat tns_2026icy_2461136.82_Magellan-Baade_IMACS_POISE.fits Object The spectrum consists of two 1500-second exposures.

Comments