RA/DEC (2000)
11:57:17.685 +25:11:14.75
179.323688 +25.18743
Type
SN Ic-BL
Redshift
0.014
Discovery ReportClassification Report
Related AstroNotes: DRAFT-2173, 2025-168
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-06-01 06:29:46.752
TNS AT
Y
Public
Y
Discovery Mag
18.914
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), 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_2025msx - 2025-06-03 05:23:26 Lick-3m / KAST (UCSC)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-MLO_ATLAS-01_orange
 ▌ATLAS-HKO_ATLAS-02_cyan
   
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
21235 2025-06-03 05:23:26 Lick-3m / KAST Ravjit Kaur UCSC tns_2025msx_2025-06-03_05-23-26.39_Lick-3m_KAST_UCSC.flm Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-06-01 06:29:47 - 2025-06-01 06:29:47 2460827.77068 - 2460827.77068 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
493269 2025-06-01 06:29:47 2460827.77068 18.914 0.157 19.42 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
cyan-ATLAS ATLAS-HKO_ATLAS-02 2025-05-31 07:12:03 - 2025-05-31 07:12:03 2460826.80003 - 2460826.80003 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
493268 2025-05-31 07:12:03 2460826.80003 19.46 ABMag cyan-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
257579 2025-06-01 16:51:36 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 11:57:17.685 +25:11:14.75 2025-06-01 06:29:46.752 18.914 orange-ATLAS PSN ATLAS25fvu ATLAS 2025TNSTR2060....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
21235 2025-06-06 05:21:58 Ravjit Kaur Ravjit Kaur (UCSC), Kishore Patra (UCSC), Kyle Davis (UCSC), Ryan Foley (UCSC) UCSC SN Ic-BL 0.014 1 Add UCSC When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy. The observed spectrum is particularly red, and assuming a typical blue spectrum for a young SN, the color can be attributed to dust reddening of E(B-V) ~ 1.2 mag. The spectrum has broad spectral features consistent with that of a SN Ic-BL soon after peak brightness. The ATLAS light curve is either still rising or at peak, and so we caution that the phase reported is likely biased by ~7 days. Correcting for the derived reddening and a Hubble-flow distance accounting for Virgo inflow and the Great Attractor, we find an absolute magnitude of M_o = -19.0 mag, consistent with a SN Ic-BL before peak brightness. 2025TNSCR2130....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
21235 2025-06-03 05:23:26 Lick-3m / KAST Ravjit Kaur UCSC tns_2025msx_2025-06-03_05-23-26.39_Lick-3m_KAST_UCSC.flm Object

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