SALT spectroscopic classification of microlensing event candidate Gaia22bmp
ATel #15373; M. Gromadzki, L. Wyrzykowski (Astronomical Observatory, University of Warsaw), D. A. H. Buckley (South African Astronomical Observatory)
on 10 May 2022; 08:42 UT
Credential Certification: Mariusz Gromadzki (marg@astrouw.edu.pl)
Subjects: Optical, Microlensing Event
We report on SALT spectroscopy of transient event Gaia22bmp/AT2022hjv, discovered by Gaia Science Alerts (Hodgkin et al. 2021), https://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22bmp. A low resolution (R = 350) SALT/RSS spectra was taken on 2022-05-07, under the SALT Large Programme on transients (2021-2-LSP-001). Spectrum shows stellar continuum affected by Galactic and Interstellar extinction with absorption lines of hydrogen, Na I, Mg I and Ca II. This suggests that the object is a reddened K-type star and its undergoing brightening is caused by a microlensing event. The spectrum and additional details can be obtained from the IAU Transient Name Server (TNS), https://www.wis-tns.org/object/2022hjv.
