Discovery certificate for object 2018xu
TNS Astronomical Transient Report No. 17039 [ 2018TNSTR.249....1D ]

Date Received (UTC): 2018-02-20 18:25:36
Sender: Gaia (Gaia_Bot1)
Source Group: GaiaAlerts

A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts team report/s the discovery of a new astronomical transient.

IAU Designation: AT 2018xu
Discoverer internal name: Gaia18amk
Coordinates (J2000): RA = 08:48:55.950 (132.233125) DEC = +58:41:54.24 (58.6984)
Discovery date: 2018-02-17 12:24:28 (JD=2458167.0169907)


Remarks: long-term brightening in erratic Gaia source coincidence with LEDA 3095827 (Seyfert 1 Galaxy)

Photometry

Discovery (first detection):
Discovery date: 2018-02-17 12:24:28
Flux: 17.31 ABMag
Filter: G-Gaia
Instrument: Gaia-photometric
Telescope: Gaia Spacecraft

Last non-detection:
Last non-detection date: 2017-09-21 17:29:45
Limiting flux: 21.5 ABMag
Filter: G-Gaia
Instrument: Gaia-photometric
Telescope: Gaia Spacecraft


Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2018xu