RA/DEC (2000)
09:28:39.660 +38:33:47.20
142.16525 +38.563111
Type
SN Ia-91T-like
Redshift
0.012454
Discovery ReportClassification Report
Related AstroNotes: 2020-17
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2020-01-20 12:04:19.000
TNS AT
Y
Public
Y
Discovery Mag
18.891
Filter
cyan-ATLAS
Reporter/s
J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, D. O'Neill, P. Clark, M. Fulton, J. Gillanders, M. Dobson (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2020akf - 2020-01-22 14:14:16 FTN / FLOYDS-N (Global SN Project)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

 ▌PS2_GPC2_w
 ▌Gaia_Gaia-photometric_G
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌ATLAS-HKO_ATLAS-02_cyan
 ▌PS1_GPC1_z
   
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
5969 2020-01-22 14:14:16 FTN / FLOYDS-N 3600 Las Cumbres Observatory Daichi Hiramatsu Global SN Project tns_2020akf_2020-01-22_14-14-16_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2020akf_2020-01-22_14-14-16_FTN_FLOYDS-N_Global_SN_Project.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
w-P1 PS2_GPC2 2020-01-20 11:54:14 - 2020-01-20 11:54:14 2458868.9959954 - 2458868.9959954 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
119153 2020-01-20 11:54:14 2458868.9959954 18.88 0.02 22 ABMag w-P1 PS2_GPC2 45 Robot
G-Gaia Gaia_Gaia-photometric 2019-12-13 09:34:34 - 2020-04-16 07:19:12 2458830.899 - 2458955.805 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
131297 2020-04-16 07:19:12 2458955.805 18.02 0.2 ABMag G-Gaia Gaia_Gaia-photometric 60 Robot
131296 2019-12-13 09:34:34 2458830.899 21.5 ABMag G-Gaia Gaia_Gaia-photometric Robot [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2020-01-18 12:43:12 - 2020-01-18 12:43:12 2458867.03 - 2458867.03 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
115052 2020-01-18 12:43:12 2458867.03 19.64 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
cyan-ATLAS ATLAS-HKO_ATLAS-02 2020-01-20 12:04:19 - 2020-01-20 12:04:19 2458869.0029977 - 2458869.0029977 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
115053 2020-01-20 12:04:19 2458869.0029977 18.891 0.132 19.85 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
z-P1 PS1_GPC1 2020-01-22 16:13:26 - 2020-01-22 16:13:26 2458871.1759954 - 2458871.1759954 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
117287 2020-01-22 16:13:26 2458871.1759954 17.76 0.03 20.4 ABMag z-P1 PS1_GPC1 120 Robot
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 Bibcode Unreal Auto classification
68009 2020-04-17 13:53:25 Gaia_Bot1 S.T. Hodgkin,E. Breedt,A. Delgado et al. GaiaAlerts GaiaAlerts 09:28:39.660 +38:33:47.20 2020-04-16 07:19:12.000 18.02 G-Gaia PSN Gaia20bvq GaiaAlerts confirmed SN Ia-91T-like N
61304 2020-02-08 00:39:15 PS2_Bot1 K. C. Chambers,T. de Boer,J. Bulger et al. Pan-STARRS Pan-STARRS 09:28:39.663 +38:33:47.10 2020-01-20 11:54:14.000 18.88 w-P1 PSN PS20kr Pan-STARRS N
60411 2020-01-28 23:28:23 PS1_Bot1 K. C. Chambers,T. de Boer,J. Bulger et al. Pan-STARRS Pan-STARRS 09:28:39.669 +38:33:47.15 2020-01-22 16:13:26.000 17.76 z-P1 PSN PS20kr Pan-STARRS N
59405 2020-01-21 12:40:14 ATLAS_Bot1 J. Tonry,L. Denneau,A. Heinze et al. ATLAS ATLAS 09:28:39.617 +38:33:47.07 2020-01-20 12:04:19.000 18.891 cyan-ATLAS PSN ATLAS20bmm ATLAS 2020TNSTR.206....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
5961 2020-01-23 18:33:34 Jamison Burke Jamison Burke, Daichi Hiramatsu, D. Andrew Howell, Curtis McCully, Craig Pellegrino Global SN Project SN Ia-91T-like 0.012454 1 1 Global SN Project Using Superfit (Howell et al. 2005, ApJ, 634, 1190) and SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to SNe Ia, including SN 1999aa and SN 1999ac at early times. The supernova is closest to KUG 0925+387B (z =0.012454 DM ~ 33.7; 2004SDSS3.C...0000, values from NED), and this host redshift is confirmed by host hydrogen and O III lines in the 2D spectrum. No fit by either SNID or Superfit matches all spectral features. We have included the Superfit comparison to SN 1999aa at -7 days, but SN 2020akf displays possible deep C II 6580 absorption at approximately 15,000 km/s, in addition to brighter fluxes bluewards of 4000 angstroms. The magnitude reported by ATLAS on discovery (AstroNote 2020-17) was 18.89 on 2020-01-20.50 (absolute magnitude -14.8), with a non-detection two days earlier. The absolute magnitude, blue continuum, and unusual spectral features lead us to tentatively classify this as a very young overluminous SN Ia. Further followup is encouraged. 2020TNSCR.241....1B
Related files
File Comments Last Modified (UT) Modified By
tns_2020akf_classrep_5961_Global_SN_Project.ps 2020-01-23 18:33:34 Jamison Burke
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
5969 2020-01-22 14:14:16 FTN / FLOYDS-N 3600 Las Cumbres Observatory Daichi Hiramatsu Global SN Project tns_2020akf_2020-01-22_14-14-16_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2020akf_2020-01-22_14-14-16_FTN_FLOYDS-N_Global_SN_Project.fits Object

Comments

TNS
System

Fri, 04/17/2020 - 13:30

Object coordinates updated

Object coordinates updated according to AT-report 68009 of Group GaiaAlerts
Previous RA, DEC: 09:28:39.663, +38:33:47.10 (142.165263841, +38.5630839578)
Updated RA, DEC: 09:28:39.660, +38:33:47.20 (142.16525, 38.563111)

TNS
System

Sat, 02/08/2020 - 00:30

Object coordinates updated

Object coordinates updated according to AT-report 61304 of Group Pan-STARRS1
Previous RA, DEC: 09:28:39.669, +38:33:47.15 (142.165287123, +38.5630971945)
Updated RA, DEC: 09:28:39.663, +38:33:47.10 (142.165263841, 38.5630839578)

TNS
System

Tue, 01/28/2020 - 22:30

Object coordinates updated

Object coordinates updated according to AT-report 60411 of Group Pan-STARRS1
Previous RA, DEC: 09:28:39.617, +38:33:47.07 (142.165071111, +38.5630755556)
Updated RA, DEC: 09:28:39.669, +38:33:47.15 (142.165287123, 38.5630971945)