TNS Classification Report No. 5382 [ 2019TNSCR2214....1T ]
Date Received (UTC): 2019-10-28 11:22:32 Sender: Dr. Lina Tomasella
Group: Padova-Asiago
L. Tomasella, S. Benetti, E. Cappellaro, M. Turatto (INAF Osservatorio Astronomico di Padova) report/s a classification of object: AT 2019tlu
Type: CV
Remarks: The spectrum shows a blue continuum with narrow Halpha, Hbeta and Hgamma in emission at the rest wavelength. The transient is therefore a cataclysmic variable (CV). The Balmer decrement from the emission components, with the presence of a fairly strong Halpha and higher members of the series showing progressively stronger absorptions, confirms the classification as a dwarf nova. Also the He I emission at 587.6 nm is clearly visible
The following Classification spectrum was provided:
Obsdate: 2019-10-27 21:36:00
Instrument: AFOSC
Telescope: Asiago Ekar Telescope
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2019tlu
Date Received (UTC): 2019-10-28 11:22:32 Sender: Dr. Lina Tomasella
Group: Padova-Asiago
L. Tomasella, S. Benetti, E. Cappellaro, M. Turatto (INAF Osservatorio Astronomico di Padova) report/s a classification of object: AT 2019tlu
Type: CV
Remarks: The spectrum shows a blue continuum with narrow Halpha, Hbeta and Hgamma in emission at the rest wavelength. The transient is therefore a cataclysmic variable (CV). The Balmer decrement from the emission components, with the presence of a fairly strong Halpha and higher members of the series showing progressively stronger absorptions, confirms the classification as a dwarf nova. Also the He I emission at 587.6 nm is clearly visible
The following Classification spectrum was provided:
Obsdate: 2019-10-27 21:36:00
Instrument: AFOSC
Telescope: Asiago Ekar Telescope
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2019tlu