AT 2017be
RA/DEC (2000)
08:13:13.38 +45:59:29.54
123.30575 45.991539
Type
LBV
Redshift
0.001
Source Group
LOSS
Discoverer
Haynes F. Stephens, WeiKang Zheng and Alexei V. Filippenko (UC Berkeley)
Discovery Date
2017-01-06 12:11:24
TNS AT
Y
Public
Y
Host Name
NGC 2537
Host Redshift
0.001491
Discovery Mag
18.5
Discovery Mag Filter
Clear-
 2017-01-10 08:33:31 FTN / FLOYDS-N (LCOGT SN-KP)
Show H at z=vexp= km/s
Show He at z=vexp= km/s
Show He ii at z=vexp= km/s
Show O at z=vexp= km/s
Show O ii at z=vexp= km/s
Show O iii 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 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 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 (observed),0 (rest)
See separate spectra
Spectra
IDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
7152017-01-10 08:33:31FTN / FLOYDS-N3600Las Cumbres ObservatoryGriffin HosseinzadehLCOGT SN-KP tns_2017be_2017-01-10_08-33-31_FTN_FLOYDS-N_LCOGT_SN-KP.ascii tns_2017be_2017-01-10_08-33-31_FTN_FLOYDS-N_LCOGT_SN-KP.fitsObjectLCOGT SN-KP
Light Curves
FilterTel / InstObs-date rangePhotometry
Clear-Other_Other2016-12-29 11:29:58 - 2017-01-06 12:11:242
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
112812017-01-06 12:11:2418.518.8VegaMagClear-Other_Other18KAIT
112802016-12-29 11:29:5818.5VegaMagClear-Other_Other18KAIT[Last non detection]
R-PTFP48_CFH12k2017-01-07 10:16:19 - 2017-01-07 10:16:191
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
114672017-01-07 10:16:1918.349ABMagR-PTFP48_CFH12k60iPTF
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
77092017-01-07 03:05:39weikangHaynes F. Stephens, WeiKang Zheng and Alexei V. Filippenko (UC Berkeley)LOSS08:13:13.38+45:59:29.542017-01-06 12:11:2418.5Clear-PSNkait-17ALOSS
Related files
FileFile TypeCommentsLast Modified (UT)Modified By
tns_2017be_atrep_7709_LOSS.jpgGraphics2017-01-07 03:05:39weikang
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
7052017-01-10 21:36:53griffinGriffin Hosseinzadeh, Curtis McCully, Iair Arcavi, D. Andrew Howell, Stefano ValentiLCOGT SN-KPLBV0.001LCOGT SN-KPThe spectrum shows a H-alpha emission at the redshift of the proposed host galaxy (z=0.001; Garrido, Marcelin, & Amram 2004, MNRAS, 349, 225; via NED) with a width corresponding to ~950 km/s (marginally resolved by the spectrograph) on top of the somewhat blue continuum of the host (SDSS DR13). Given that the discovery magnitude was 18.5 mag, corresponding to an absolute magnitude of ~-11 mag (Tully 1988, Nearby Galaxy Catalog; Sharina, Karachentsev, & Tikhonov 1999, AstL, 25, 322; via NED), we conclude that the transient is likely an extragalactic LBV outburst (i.e. a supernova impostor).

Comments