VLT/X-Shooter spectroscopic observation of microlensing event Gaia22awa/AT2022eii
ATel #15331; P. Zielinski (Institute of Astronomy, Nicolaus Copernicus University in Torun), M. Gromadzki, L. Wyrzykowski, K. Kruszynska, K. A. Rybicki, N. Ihanec (Astronomical Observatory, University of Warsaw), Â S. T. Hodgkin (IoA Cambridge), J. Corral-Santana (ESO), E. Bachelet (LCO),I. Gezer (Konkoly Observatory)
on 14 Apr 2022; 14:12 UT
Credential Certification: Mariusz Gromadzki (marg@astrouw.edu.pl)
Subjects: Optical, Microlensing Event
We report on the spectroscopic observations of Gaia22awa/AT2022eii bright Galactic transient found by Gaia Science Alerts (Hodgkin et al. 2021), https://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22awa . Spectra were obtained on the night of 2022 April 39th with the ESO/VLT/X-Shooter instrument with slit widths 1.0'', 0.7'', 0.6'' yielding resolutions of 6000, 10500, 8000 in UBV, VIS and NIR, respectively. Spectrum shows clear absorption features corresponding to K4III star. This confirms the transient is a microlensing event. The visual arm of the spectrum and additional details can be obtained from the IAU Transient Name Server (TNS), https://www.wis-tns.org/object/2022eii . We thank ESO/VLT staff for support. Observations were carried out under ESO programme 108.22JZ, PI: Wyrzykowski.
