SN 2017gjn
RA/DEC (2000)
02:43:48.430 +32:31:33.85
40.951792 +32.526069
Type
SN Ia
Redshift
0.015
Reporting Group
XOSS
Discovering Data Source
XOSS
Discovery Date
2017-08-29 20:38:17
TNS AT
Y
Public
Y
Host Name
NGC 1067
Discovery Mag
15.4
Filter
Clear-
Reporter/s
Yanxi Li, Haochen Xue, Jingyuan Zhao, Mi Zhang, Xianyi Hu, Xiaobing Wang, Jiangao Ruan, Xing Gao

Spectra

 SN_2017gjn - 2017-09-02 00:01:26 Other / Other (None)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
11942017-09-02 00:01:26Other / Other3000R LeadbeaterNone tns_2017gjn_2017-09-02.001_Other_Other.txt tns_2017gjn_2017-09-02.001_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
Clear-Other_Other2016-09-29 22:32:47 - 2017-08-29 20:38:172
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
198282017-08-29 20:38:1715.419.5VegaMagClear-Other_Other40Xing GaoUsing a unfiltered CCD + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9.
198272016-09-29 22:32:4719.3VegaMagClear-Other_Other40Xing Gao[Last non detection] Using a unfiltered CCD + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9.
G-GaiaGaia_Gaia-photometric2017-07-23 16:53:45 - 2017-08-24 04:36:282
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
198522017-08-24 04:36:2817.810.2ABMagG-GaiaGaia_Gaia-photometric60Robot
198512017-07-23 16:53:4521.5ABMagG-GaiaGaia_Gaia-photometricRobot[Last non detection]
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
133152017-08-31 09:57:42Gaia_Bot1A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts teamGaiaAlertsGaiaAlerts02:43:48.430+32:31:33.852017-08-24 04:36:2817.81G-GaiaPSNGaia17cdpGaiaAlerts candidate SN almost 1 arcminute from centre of cluster galaxy NGC 1067
133032017-08-30 03:25:32Zhijian XuYanxi Li, Haochen Xue, Jingyuan Zhao, Mi Zhang, Xianyi Hu, Xiaobing Wang, Jiangao Ruan, Xing GaoXOSSXOSS02:43:48.410+32:31:33.702017-08-29 20:38:1715.4Clear-PSNPSP17AXOSSYanxi Li, Haochen Xue, Jingyuan Zhao, Mi Zhang, Xianyi Hu, Xiaobing Wang, Jiangao Ruan and Xing Gao report the discovery of a possible supernova in NGC 1067. The transient (mag approximately 15.4) on one 40-s survey image (limiting mag about 19.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Aug. 29.85969, 2017 UT using a unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). The new object approximately located at R.A.=02h43m48.41s +32d31'33".7 (equinox 2000.0). Which is about 26.7" west and 51.2" north of the center of the NGC1067. Nothing is visible at this position on archival image taken on Sep 29.93943, 2016 (limiting mag 19.3). All images can be seen from: http://www.xjltp.com/XOSS/PSP17A/PSP17A.htm.
Classification Reports
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
11902017-09-02 10:57:25THORobin LeadbeaterNoneSN Ia0.015Using GELATO https://gelato.tng.iac.es/ gives a good match to a type 1a supernova a few days before maximum.

Comments

Object coordinates updated according to AT-report 13315 of Group GaiaAlerts
Previous RA, DEC: 02:43:48.410, +32:31:33.70 (40.951708, +32.526028)
Updated RA, DEC: 02:43:48.430, +32:31:33.85 (40.951792, 32.526069)

This transient was detected on 2017 08 31.08752 by Massimo Caimmi from Valdicerro Observatory C92 - Loreto (AN) - Italy using 0.24-m f/6.5 SCT + CCD Atik 314L during the Italian Supernovae Search Project (ISSP). Stack of 15 unfiltered b2x2 frames x 30sec unguided exposures, show the source at 15.5 Mag. End figures for astrometry were AR. 48.42s and DEC. 33.9" position measured from UCAC-4 reference stars catalogue.