Discovery certificate for object 2015dh
TNS Astronomical Transient Report No. 52597 [ 2019TNSTR2354....1K ]

Date Received (UTC): 2019-11-13 10:39:25
Sender: Mr. Richard Nowell
Reporting Group: None     Discovery Data Source: None

Marco Kovic, Christine Macmillan report/s the discovery of a new astronomical transient.

IAU Designation: AT 2015dh
Coordinates (J2000): RA = 01:43:22.746 (25.844773) DEC = +25:32:11.10 (25.536417)
Discovery date: 2015-10-11 05:20:38 (JD=2457306.722662)

Potential host galaxy: SDSS J014323.04+253206.7
Host redshift: 0.131606

Remarks: This transient was first observed by Marco Kovic on the Galaxy Zoo website here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/subjects/34213457

Photometry

Discovery (first detection):
Discovery date: 2015-10-11 05:20:38
Flux: 22.68 ABMag
Filter: g-Sloan
Instrument: DECAM
Telescope: CTIO - 4-m Victor M. Blanco Telescope

Remarks: The g-band Apparent magnitude was calculated by Richard Nowell using APT and reference star: SDSS J014317.25+253219.5 http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237680074470654341. A g-band Absolute magnitude of -16.15 was also calculated.

Last non-detection:
Archival info: SDSS

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2015dh