SN 2018btm
RA/DEC (2000)
23:19:44.486 +22:30:08.63
349.935358 +22.502397
Type
SN Ia
Redshift
0.039
Source Group
ASAS-SN
Discovery Date
2018-05-13 14:24:00
TNS AT
Y
Public
Y
Host Name
2MASX J23194510+2230081
Host Redshift
0.039
Discovery Mag
17.3
Filter
V-Johnson
Discoverer/s
J. Brimacombe, G. Stone, K. Z. Stanek, for the ASAS-SN team

Spectra

 SN_2018btm - 2018-06-12 01:14:52 UH88 / SNIFS (SCAT)z=
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   Binning factor: (rounded to nearest integer >1)
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Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
21282018-06-12 01:14:52UH88 / SNIFS920Tucker, Rowan, ShappeeSCAT tns_2018btm_2458281.552_UH88_SNIFS_SCAT.datObjectSCATReduced using a quick-reduction pipeline, intended for classification and quick-look purposes. Care should be taken before re-using this spectrum for further analysis.
Light Curves
FilterTel / InstObs-date rangePhotometry
V-JohnsonASASSN-1_Brutus2018-05-13 14:24:00 - 2018-05-13 14:24:001
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
286712018-05-13 14:24:0017.3VegaMagV-JohnsonASASSN-1_Brutus
g-SloanASASSN-5_Payne-Gaposchkin2018-05-05 11:02:24 - 2018-05-05 11:02:241
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
286702018-05-05 11:02:2417.2ABMagg-SloanASASSN-5_Payne-Gaposchkin[Last non detection]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
186672018-05-18 21:22:01KZStanekJ. Brimacombe, G. Stone, K. Z. Stanek, for the ASAS-SN teamASAS-SN23:19:44.486+22:30:08.632018-05-13 14:24:0017.3V-JohnsonPSNASASSN-18knASAS-SNConfirmed by follow-up imaging
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
21212018-06-13 02:59:26tuckermaMichael A. Tucker, Dominick M. Rowan, Benjamin J. Shappee (IfA, UH Manoa), Subo Dong, Subhash Bose (KIAA, PKU)SCATSN Ia0.039SCATThe Spectral Classification of Astronomical Transients (SCAT) survey reports the classification of ASASSN-18kn (SN2018btm) as a Type Ia supernova roughly a month after maximum light. The observations were taken with the SuperNova Integral Field Spectrograph (SNIFS) on the University of Hawaii 88-inch (UH88) telescope ranging from 330-970nm. The classification was determined using a library of supernovae spectra (SNID, Blondin & Tonry 2007, ApJ, 666, 1024). The spectrum also matches that of a 91bg-type SN Ia but the quality is too poor to say definitively.

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