SN 2017htb
RA/DEC (2000)
22:09:38.73 +17:39:40.39
332.411375 +17.661219
Type
SN Ia-91T-like
Redshift
0.027
Source Group
ASAS-SN
Discovery Date
2017-11-02 04:33:36
TNS AT
Y
Public
Y
Host Name
KUG 2207+174
Host Redshift
0.026852
Discovery Mag
16.7
Filter
g-Sloan
Discoverer/s
D. Bersier, K. Z. Stanek, for the ASAS-SN team
 2017-11-06 12:00:00 Lijiang-2.4m / YFOSC
 2017-11-05 20:03:41 Other / Other
 2017-11-05 20:03:41 Other / Other
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Spectra
IDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
13992017-11-06 12:00:00Lijiang-2.4m / YFOSC1200Jujia Zhang tns_2017htb_2017-11-06.5_LJT_YFOSC.datObject
13972017-11-05 20:03:41Other / Other3607R LeadbeaterR Leadbeater tns_2017htb_2017-11-05_20-03-41_Other_Other.dat tns_2017htb_2017-11-05_20-03-41_Other_Other.fitObjectR~150 spectrum obtained using modified ALPY spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm. Revised version (improved wavelength calibration, SNR. Host Galaxy contribution removed)
13962017-11-05 20:03:41Other / Other1803R LeadbeaterR Leadbeater tns_2017htb_2458063.3359_Other_Other.dat tns_2017htb_2458063.3359_Other_Other.fitObjectR~150 spectrum obtained using modified ALPY spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm
Light Curves
FilterTel / InstObs-date rangePhotometry
i-SloanPS1_GPC12017-11-05 07:07:40 - 2017-11-05 07:07:401
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
220732017-11-05 07:07:4016.760.0220.7ABMagi-SloanPS1_GPC145Robot
G-GaiaGaia_Gaia-photometric2017-10-15 15:36:00 - 2017-10-25 15:41:452
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
217152017-10-25 15:41:4518.390.2ABMagG-GaiaGaia_Gaia-photometric60Robot
217142017-10-15 15:36:0021.5ABMagG-GaiaGaia_Gaia-photometricRobot[Last non detection]
g-SloanASASSN-4_Leavitt2017-10-26 01:55:12 - 2017-11-02 04:33:362
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
217092017-11-02 04:33:3616.7ABMagg-SloanASASSN-4_Leavitt
217082017-10-26 01:55:1218.6ABMagg-SloanASASSN-4_Leavitt[Last non detection]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
146492017-11-14 00:28:31PS1_Bot1K. C. Chambers, M. E. Huber, H. Flewelling, E. A. Magnier, A. Schultz, T. Lowe, J. Bulger (IfA, University of Hawaii), S. J. Smartt, K. W. Smith, (Queen's University Belfast), J. Tonry, C. Waters, (IfA, University of Hawaii) D. E. Wright, D. R. Young (Queen's University Belfast)Pan-STARRS122:09:38.73+17:39:40.442017-11-05 07:07:4016.76i-SloanPSNPS17eyxPan-STARRS1
144162017-11-03 12:12:44Gaia_Bot1A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts teamGaiaAlerts22:09:38.73+17:39:40.392017-10-25 15:41:4518.39G-GaiaPSNGaia17cslGaiaAlertscandidate SN near galaxy 2MASX J22093900+1739415, GS-TEC predicts SN Ia, aka AT2017htb
144132017-11-03 11:52:46KZStanekD. Bersier, K. Z. Stanek, for the ASAS-SN teamASAS-SN22:09:38.69+17:39:40.102017-11-02 04:33:3616.7g-SloanPSNASASSN-17ocASAS-SNIn two epochs; first SN candidate from the new "Henrietta Leavitt" telescope
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
13952017-11-07 02:55:38jujiaJujia Zhang, Kai Ye (YNAO) and Xiaofeng Wang (Tsinghua University)
SN Ia-91T-like0.027The spectrum matches a 91T like SN Ia at a few days before maximum, e.g., SN 2007S = -4 days.
13932017-11-06 02:49:39THORobin LeadbeaterSN Ia-91T-like0.027Classification using SNID ( Blondin, S. & Tonry, J. L. 2007. ApJ, 666, 1024) predicts a type 1a (sub type 91T) supernova a few days pre maximum.
13922017-11-05 21:57:04THORobin LeadbeaterSN IaClassification using SNID ( Blondin, S. & Tonry, J. L. 2007. ApJ, 666, 1024) predicts a type 1a supernova a few days pre maximum. The sub-type is uncertain but the best fit is to a type 91-T

Comments

The coordinates of this object - 2017htb - were updated according to the coordinates reported by Gaia, and object 2017hte was removed.