SN 2017bos
RA/DEC (2000)
09:46:29.98 -21:34:19.78
146.62492 -21.57216
Type
SN Ia
Redshift
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Source Group
ASAS-SN
Discoverer
K. Z. Stanek, for the ASAS-SN team
Discovery Date
2017-03-01 01:55:12
TNS AT
Y
Public
Y
Host Name
NGC 2996
Host Redshift
0.02927
Discovery Mag
16.4
Discovery Mag Filter
V-Johnson
 2017-03-02 05:27:13 FLWO 1.5m / FAST (ASAS-SN)
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Spectra
IDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
8352017-03-02 05:27:13FLWO 1.5m / FASTM. CalkinsASAS-SN tns_2017bos_2457814.727242_FLWO_1.5m_FAST_ASAS-SN.txt tns_2017bos_2457814.727242_FLWO_1.5m_FAST_ASAS-SN.fitsObjectASAS-SN
Light Curves
FilterTel / InstObs-date rangePhotometry
V-JohnsonASASSN-2_Cassius2017-02-18 06:14:24 - 2017-03-01 01:55:123
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
141572017-03-01 01:55:1216.40.0717.6VegaMagV-JohnsonASASSN-2_Cassius
141582017-02-22 05:45:3617.150.1517.7VegaMagV-JohnsonASASSN-2_Cassius
141562017-02-18 06:14:2417.7VegaMagV-JohnsonASASSN-2_Cassius[Last non detection]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
96262017-03-01 03:19:18KZStanekK. Z. Stanek, for the ASAS-SN teamASAS-SN09:46:29.98-21:34:19.782017-03-01 01:55:1216.4V-JohnsonPSNASASSN-17dfASAS-SNIn two epochs, on the rise, very close to the nucleus, so also a TDE candidate
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
8252017-03-03 13:01:52jlprietoJ. L. Prieto, E. FalcoASAS-SNSN IaASAS-SNWe obtained an optical spectrum of ASASSN-17df/AT2017bos on UT 2017 Mar 2.2 with FAST mounted on the FLWO 1.5m telescope. The spectrum shows features consistent with a Type Ia SN around maximum light on top of strong host galaxy contamination. We measure Si II 6355 Angs. expansion velocity of 9800 km/s from the minimum of the P-Cygni absorption trough.

Comments

S. Leonini, M. Conti, P. Rosi, L.M. Tinjaca Ramirez, report the first detection of the SN in NGC2996 at Montarrenti Observatory (Siena, Italy) in the course of Italian Supernovae Search Project using 0.53m RC telescope + U47 detector. Photometry (USNO B1, R-band ref stars):
2017-02-14T23:22:17 17.865 +- 0.049
2017-02-21T23:32:45 16.659 +- 0.071
2017-02-27T23:14:36 15.932 +- 0.038
2017-03-01T21:07:24 16.106 +- 0.045