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Optical follow-up of Gaia17bqo

ATel #10573; Y. Bufan, V. Godunova (ICAMER Observatory, Ukraine), V. Reshetnyk, A. Simon (Astronomy and Space Physics Department, National Taras Shevchenko University of Kyiv)
on 13 Jul 2017; 18:24 UT
Credential Certification: Andrew Simon (skazhenijandrew@gmail.com)

Subjects: Optical, Transient

We report photometric observations of the optical transient Gaia17bqo which was discovered by Gaia on 2017-06-30 at magnitude G = 18.03. We confirmed Gaia17bqo with images taken on 2017-07-02 with the 0.6-m Zeiss telescope at the Terskol Observatory (see Fig. 1). There is no progenitor object on archival images. We detected a rapid decay of Gaia17bqo with changing its color within four days. The following magnitudes of the object were derived:
MJDBeBVeV
57936.9517.480.0918.000.16
57937.9917.600.0617.660.11
57940.0118.100.2019.300.20
The magnitudes were calibrated against NOMAD field stars; they are not corrected for the Galactic foreground extinction. We acknowledge ESA Gaia, DPAC and the Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts).

Fig. 1