Discovery certificate for object 2000gk
TNS Astronomical Transient Report No. 25775 [ 2018TNSTR1857....1N ]

Date Received (UTC): 2018-12-03 11:13:39
Sender: Mr. Richard Nowell
Source Group: None

R. Nowell, G.Morrone report/s the discovery of a new astronomical transient.

IAU Designation: AT 2000gk
Coordinates (J2000): RA = 10:21:30.192 (155.3758) DEC = +01:04:29.28 (1.0748)
Discovery date: 2000-05-05 05:13:03 (JD=2451669.7173958)

Potential host galaxy: 2MASX J10213013+0104242
Host redshift: 0.10975

Remarks: This transient was first noticed in a discussion started by participant georgem571 (George Morrone) on the website Galaxy Zoo here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/subjects/25810951. The other participant is Rick Nowell.

Photometry

Discovery (first detection):
Discovery date: 2000-05-05 05:13:03
Flux: 19.14 ABMag
Filter: r-Sloan
Instrument: SDSS-Spec
Telescope: Sloan Digital Sky Survey

Remarks: The r-band Apparent magnitude was calculated by Richard Nowell using APT and reference star: SDSS J102130.18+010409.7 http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237648722830557362 . The r-band Absolute magnitude is -19.37 (with k-correction).

Last non-detection:
Archival info: SDSS

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2000gk