AT 2018hyz
RA/DEC (2000)
10:06:50.871 +01:41:34.08
151.711964138 +1.69279894089
Type
TDE
Redshift
0.04573
Discovery ReportClassification Report
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2018-11-06 15:21:36.000
TNS AT
Y
Public
Y
Host Name
2MASS J10065085+0141342
Host Redshift
0.045815
Discovery Mag
16.4
Filter
V-Johnson
Reporter/s
J. Brimacombe, K. Z. Stanek, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2018hyz - 2018-11-12 13:16:53 FTN / FLOYDS-N (None)z=
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
30152018-11-12 13:16:53FTN / FLOYDS-N2700RoboticJ. BurkeNone tns_2018hyz_2018-11-12_13-16-53_FTN_FLOYDS-N.ascii tns_2018hyz_2018-11-12_13-16-53_FTN_FLOYDS-N.fitsObject
Light Curves
FilterTel / InstObs-date rangePhotometry
V-JohnsonASASSN-1_Brutus2018-10-17 14:38:24 - 2018-11-06 15:21:362
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
388252018-11-06 15:21:3616.4VegaMagV-JohnsonASASSN-1_Brutus
388242018-10-17 14:38:2417.5VegaMagV-JohnsonASASSN-1_Brutus[Last non detection]
orange-ATLASATLAS1_ACAM12019-04-27 08:35:31 - 2019-05-01 07:55:122
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
944662019-05-01 07:55:1218.6940.09919.37ABMagorange-ATLASATLAS1_ACAM130Robot
944652019-04-27 08:35:3119.34ABMagorange-ATLASATLAS1_ACAM130Robot[Last non detection]
g-ZTFP48_ZTF-Cam2018-12-09 11:02:24 - 2019-04-11 05:26:522
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
611062019-04-11 05:26:5216.58ABMagg-ZTFP48_ZTF-Cam30ZTF
611052018-12-09 11:02:2417.73ABMagg-ZTFP48_ZTF-Cam30ZTF
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
492322019-10-10 14:33:07ATLAS_Bot1J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, D. O'Neill, P. Clark, M. Fulton, J. Gillanders, M. Dobson (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota)ATLASATLAS10:06:50.871+01:41:34.082019-05-01 07:55:12.00018.694orange-ATLASPSNATLAS18bafsATLAS
328842019-04-11 21:37:53ZTF_Bot1C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaborationZTFZTF10:06:50.885+01:41:33.912018-12-09 11:02:24.00017.73g-ZTFPSNZTF18acpdvosZTF
241332018-11-06 19:56:47KZStanekJ. Brimacombe, K. Z. Stanek, for the ASAS-SN teamASAS-SNASAS-SN10:06:50.738+01:41:34.372018-11-06 15:21:36.00016.4V-JohnsonPSNASASSN-18zjASAS-SNOn the rise
Classification Reports
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarksADS Bibcode
30072018-11-13 17:55:28iairIair ArcaviNoneTDE0.04573The spectrum shows broad Balmer emission lines on top of a blue continuum, consistent with both a young Type II supernova or a tidal disruption event (e.g. Arcavi et al. 2014, ApJ, 793, 38; Holoien et al. 2014, MNRAS, 445, 3263), as noted by Dong et al. 2018 (ATel 12198). Superfit (Howell et al. 2005, ApJ, 634, 1190) finds better a better fit to the TDE PTF09djl (Arcavi et al. 2014, ApJ, 793, 38) than to young Type II supernovae (though the broad He II emission feature seen in many TDEs is still absent here). Also noted by Dong et al. 2018 (ATel 12198) is that an archival spectrum of the host galaxy from SDSS (from which the redshift in this report is taken, retrieved via DR14) displays strong narrow Balmer absorption features consistent with an E+A / Quiescent Balmer Strong galaxy - an environment strongly preferred by TDEs (Arcavi et al. 2014, ApJ 793, 38; French, Arcavi & Zabludoff, 2016, ApJL, 818, 21). The coordinates reported for this object in Brimacombe et al. (ATel 12194) are more consistent with the center of the host galaxy compared to the coordinates initially reported to the TNS, further strengthening the case for a TDE classification. 2018TNSCR1764....1A

Comments

TNS System (WIS)

Thu, 10/10/2019 - 14:33

Object coordinates updated according to AT-report 49232 of Group ATLAS
Previous RA, DEC: 10:06:50.885, +01:41:33.91 (151.7120204, +1.6927538)
Updated RA, DEC: 10:06:50.871, +01:41:34.08 (151.711964138, 1.69279894089)

TNS System (WIS)

Sun, 06/23/2019 - 10:45

Object coordinates updated according to AT-report 32884 of Group ZTF
Previous RA, DEC: 10:06:50.738, +01:41:34.37 (151.71141, +1.69288)
Updated RA, DEC: 10:06:50.885, +01:41:33.91 (151.7120204, 1.6927538)

Patrick Vallely (The Ohio State University)

Wed, 11/07/2018 - 16:32

http://www.astronomy.ohio-state.edu/assassin/followup/asassn-18zj.png