Photometric observations of Gaia17cvx
ATel #11005; Andrew Simon (Taras Shevchenko National University of Kyiv, Ukraine), Yurii Bufan (ICAMER Observatory & Ivan Franko National University of Lviv, Ukraine), Vira Godunova (ICAMER Observatory, Ukraine)
on 24 Nov 2017; 17:49 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Andrew Simon (skazhenijandrew@gmail.com)
Subjects: Optical, Transient
The optical transient Gaia17cvx was discovered by Gaia on 2017-11-11 at magnitude G = 19.28. We confirmed Gaia17cvx with images taken with the 0.6-m Zeiss telescope at the Terskol Observatory on 2017-11-15, just after the alert was published. The source was found to be bright enough that allowed us to perform its differential photometry. The following magnitudes of Gaia17cvx were derived (calibrated against NOMAD field stars; not corrected for the Galactic foreground extinction):
| MJD | exptime | filter | mag | errstat |
| 58072,6341 | 600 s | B | 18,62 | 0,32 |
| 58072,6356 | 600 s | V | 17,49 | 0,10 |
| 58072,6367 | 300 s | R | 16,72 | 0,14 |
Additionally, we estimated an I magnitude of the source against three USNO-B stars; its value of 15.63 ± 0.07 (MJD 58072,6375) suggests Gaia17cvx to be a red object.
We acknowledge ESA Gaia, DPAC and the Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts).
