AT 2019udc
RA/DEC (2000)
01:53:11.206 +04:11:47.00
28.296691 +4.196389
Type
LBV
Redshift
0.006
Related AstroNotes: 2019-123
Source Group
DLT40
Discovery Date
2019-11-04 03:15:02
TNS AT
Y
Public
Y
Host Name
NGC0718
Discovery Mag
18.813
Filter
Clear-
Discoverer/s
S. Valenti, D.J.Sand, S. Wyatt, M. Lundquist, R. Amaro, J. Andrews

Spectra

 AT_2019udc - 2019-11-05 06:25:07 ESO-NTT / EFOSC2-NTT (ePESSTO+)z=
 AT_2019udc - 2019-11-04 06:54:08 Lick-3m / KAST (UCSC)z=
Show H at z=vexp= km/s
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Show Tellurics 
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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
54622019-11-05 06:25:07ESO-NTT / EFOSC2-NTT600D. B. Malesani, P. CharalampopoulosC. Angus, L. IzzoePESSTO+ tns_2019udc_2019-11-05_06-25-07_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2019udc_2019-11-05_06-25-07_ESO-NTT_EFOSC2-NTT_ePESSTO+.fitsObjectePESSTO+
54572019-11-04 06:54:08Lick-3m / KAST2400Kevin McKinnonMatt SiebertUCSC tns_2019udc_2019-11-04_06-54-08.69_Lick-3m_KAST_UCSC.flmObjectUCSC
Light Curves
FilterTel / InstObs-date rangePhotometry
Clear-Other_Other2019-11-03 18:16:16 - 2019-11-04 02:44:312
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
998472019-11-04 02:44:3118.8130.12ABMagClear-Other_Other60RobotPrompt5 0.4m
998462019-11-03 18:16:1619.0114ABMagClear-Other_Other60Robot[Last non detection] Prompt5 0.4m
orange-ATLASATLAS1_ACAM12019-11-03 08:45:36 - 2019-11-04 07:09:072
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
999362019-11-04 07:09:0718.0580.04419.43ABMagorange-ATLASATLAS1_ACAM130Robot
999352019-11-03 08:45:3619.52ABMagorange-ATLASATLAS1_ACAM130Robot[Last non detection]
g-ZTFP48_ZTF-Cam2019-11-04 07:02:00 - 2019-11-04 07:02:001
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
998792019-11-04 07:02:0019.090.120.48ABMagg-ZTFP48_ZTF-Cam30
r-ZTFP48_ZTF-Cam2019-11-01 06:31:14 - 2019-11-04 08:08:532
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
998802019-11-04 08:08:5318.240.0520.19ABMagr-ZTFP48_ZTF-Cam30
998782019-11-01 06:31:1419.9227ABMagr-ZTFP48_ZTF-Cam30[Last non detection]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
516512019-11-04 10:52:35ATLAS_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)ATLAS01:53:11.188+04:11:46.982019-11-04 07:09:0718.058orange-ATLASPSNATLAS19ztmATLAS
516262019-11-04 08:31:42ZTF_AMPEL_NEWJ. Nordin, V. Brinnel, M. Giomi, J. van Santen (HU Berlin), A. Gal-Yam, O. Yaron, S. Schulze (Weizmann) on behalf of ZTFZTF01:53:11.206+04:11:47.002019-11-04 07:02:0019.09g-ZTFPSNZTF19acoaiubZTFSee arXiv:1904.05922 for selection criteria.
516152019-11-04 03:15:05DLT40_bot1S. Valenti, D.J.Sand, S. Wyatt, M. Lundquist, R. Amaro, J. AndrewsDLT4001:53:11.190+04:11:46.962019-11-04 03:15:0218.813Clear-PSNDLT19oDLT40
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
54532019-11-05 17:30:51ePESSTOplus_Bot1D. B. Malesani, P. Charalampopoulos, C. Angus, L. Izzo, O. Yaron on behalf of ePESSTO+ePESSTO+LBV0.006ePESSTO+
54482019-11-05 07:17:25cesar.rojasbravoM. R. Siebert, G. Dimitriadis, C. D. Kilpatrick, R. J. Foley, R. Nunez, K. McKinnon and P. Guhathakurta (UCSC)UCSCLBV0.006UCSCRed spectrum (black body temperature ~ 4,500 K, assuming no host extinction) with a distinctive narrow H-alpha emission feature (FWHM ~ 1300 km/s), red-shifted at 260 km/s relative to the host (NGC 718, with spectroscopic redshift z = 0.005781). The (observed) absolute magnitude of the transient is M_r = -13.3, and dereddening by an appropriate amount to match the Na D absorption strength (EW ~ 6 Angstroms), we estimate a temperature of 15,700 K and an absolute magnitude of ~ -16. We consider these properties most similar to a reddened LBV outburst, however it is also consistent with a luminous red nova. We thank the Lick Observatory staff for helping with these target-of-opportunity observations. ATel: 13263

Comments

Object coordinates updated according to AT-report 51626 of Group ZTF
Previous RA, DEC: 01:53:11.190, +04:11:46.96 (28.296625, +4.196378)
Updated RA, DEC: 01:53:11.206, +04:11:47.00 (28.296691, 4.196389)