AT 2018hyz
RA/DEC (2000)
10:06:50.738 +01:41:34.37
151.71141 +1.69288
Type
TDE
Redshift
0.04573
Source Group
ASAS-SN
Discovery Date
2018-11-06 15:21:36
TNS AT
Y
Public
Y
Host Name
2MASS J10065085+0141342
Host Redshift
0.045815
Discovery Mag
16.4
Filter
V-Johnson
Discoverer/s
J. Brimacombe, K. Z. Stanek, for the ASAS-SN team

Spectra

 AT_2018hyz - 2018-11-12 13:16:53 FTN / FLOYDS-Nz=
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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. Burke tns_2018hyz_2018-11-12_13-16-53_FTN_FLOYDS-N.ascii tns_2018hyz_2018-11-12_13-16-53_FTN_FLOYDS-N.fits
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]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
241332018-11-06 19:56:47KZStanekJ. Brimacombe, K. Z. Stanek, for the ASAS-SN teamASAS-SN10:06:50.738+01:41:34.372018-11-06 15:21:3616.4V-JohnsonPSNASASSN-18zjASAS-SNOn the rise
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
30072018-11-13 17:55:28iairIair ArcaviTDE0.04573The 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.

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