AT 2020lrn
RA/DEC (2000)
13:56:06.800 +05:15:15.70
209.028333 +5.254361
Type
Other
Redshift
Reporting Group
None
Discovering Data Source
None
Discovery Date
2020-06-04 05:00:00.000
TNS AT
Y
Public
Y
Host Name
NGC 5363
Discovery Mag
14
Filter
L-
Reporter/s
Yizhou Zhang

Spectra

 AT_2020lrn - 2020-06-14 22:15:28 Other / Other (None)z=
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
69722020-06-14 22:15:28Other / Other3014R LeadbeaterR LeadbeaterNone tns_2020lrn_2020-06-14_22-15-28_Other_Other.dat tns_2020lrn_2020-06-14_22-15-28_Other_Other.fitObjectR~500 spectrum obtained using an ALPY 600 spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm
Light Curves
FilterTel / InstObs-date rangePhotometry
L-Other_Other2020-06-04 05:00:00 - 2020-06-04 05:00:001
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1409182020-06-04 05:00:0014ABMagL-Other_Other300Yizhou ZhangImage with personal scope
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
727822020-06-04 15:52:38yzhzhangYizhou Zhang13:56:06.800+05:15:15.702020-06-04 05:00:00.00014L-PSNA possible supernova near the core of NGC 5363 was imaged and observed. The possible supernova appears to be on the south-west of NGC 5363 and very close to the galaxy core. It's not shown up in WIKISKY or the Digitized Sky Survey. Estimated magnitude to be ~13.5 to 14.5 based on comparison to similar bright stars nearby. Reported by Philip Hoyle and assigned as AT 2020leu but seems with different RA/DEC coordinate. Just file this report as a supplemental documents.
Related files
FileFile TypeCommentsLast Modified (UT)Modified By
tns_2020lrn_atrep_72782.jpgGraphicsHere is an image with 17 300s-exposure stacked and cropped, and annotated with UCAC3 and USNO-B1 catalogs with stars ranging from 12-18 mag, and to me there is no mentioning of the suspected star.2020-06-04 15:52:40yzhzhang
Classification Reports
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarksADS Bibcode
69602020-06-24 22:36:52THORobin LeadbeaterNoneOther0As noted in the comments, this is a known foreground star. The spectrum shows it to be a type K star at approximately zero redshift2020TNSCR1923....1L

Comments

For some reason the full address was cut off in my previous post.  Please cut and paste.

This is a superposed star.  Besides AT 2020leu it was previously mistaken as SN 1987H.  See my images on flickr.  https://www.flickr.com/photos/146026104@N07/49952620732 https://www.flickr.com/photos/146026104@N07/49952571956