GEMINI/GMOS spectroscopic classification of Gaia microlensing event candidates (part 1)
ATel #13763; Ilknur Gezer, Pawel Zielinski, Mariusz Gromadzki, Lukasz Wyrzykowski, Nada Ihanec, Katarzyna Kruszynska, Krzysztof Rybicki (Astronomical Observatory, University of Warsaw), Marius Maskoliunas, Erika Pakstiene (Vilnius University), Simon Hodgkin (Institute of Astronomy, University of Cambridge)
on 26 May 2020; 09:47 UT
Credential Certification: Ilknur Gezer (igezer@astrouw.edu.pl)
Subjects: Optical, Microlensing Event, Transient, Variables
We report on recent spectroscopic observations of 5 candidates for microlensing events detected by the Gaia Science Alerts program (http://gsaweb.ast.cam.ac.uk/alerts). We have obtained Gemini/GMOS long-slit spectra (GMOS; Hook et al. 2002) for 5 objects with R400 gratings which provides resolution power of R ~ 2000 and covers the wavelength range from 400 to 900 nm. The spectra are available on IAU's Transient Name Server.
Gaia Name | IAU Name | RA (J2000) | Dec (J2000) | Discovery date | Discovery G mag | Spectrum date | Class | Notes
------------|-------------|-------------|--------------|----------------|-----------------|------------------|------------|------
Gaia19ccl | AT 2019gys | 20:43:15.02 | -02:58:17.29 | 2019-06-04 | 15.46 | 2019-09-03 | star/ULENS | (1)
Gaia19dov | AT 2019nwa |19:40:24.01 | 19:42:20.77 | 2019-08-17 | 15.46 | 2019-09-03 | star/ULENS | (2)
Gaia20abf | AT 2020dh |14:35:08.14 |-61:30:55.66 | 2020-01-01 | 11.35 | 2020-02-01 | Be/Ae star | (3)
Gaia20agb | AT 2020wr | 07:12:41.25 |-26:30:27.58 | 2020-01-12 | 13.93 | 2020-02-01 | star/ULENS | (4)
Gaia20avm | AT 2020cul |16:45:01.58 |-47:33:14.29| 2020-02-14 | 12.19 | 2020-03-10 | Be star | (5)
Notes meaning:
(1) absorption lines only visible, GK-type star
(2) stellar spectrum, GK-type star
(3)emission in Halpha line, absorption in Hbeta
(4)stellar spectrum, GK-type star
(5)strong emission in Halpha
Acknowledgements. We thank Gemini Support Astronomers for help with observations. Observations were carried out under the GS-2019B-Q-209 program. (PI: K. Kruszynska). We acknowledge ESA Gaia, DPAC, and the Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts).
