TNS Astronomical Transient Report No. 130197 [ 2021TNSTR4013....1T ]

Date Received (UTC): 2021-11-24 09:20:31
Date made public:
Sender: Richard Nowell
Reporting Group: None     Discovery Data Source: None

Ine Theunissen-Limpens report/s the discovery of a new astronomical transient.

IAU Designation: AT 2015fg
Coordinates (J2000): RA = 12:02:33.267 (180.638612) DEC = -00:08:47.89 (-0.146636)
Discovery date: 2015-03-18 12:50:48.000 (JD=2457100.0352778)

Potential host galaxy: SDSS J120233.08-000850.4
Host redshift: 0.077

Remarks: This transient was first observed by Ine Theunissen using the Galaxy Zoo website here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/1269/1766180?comment=3652716 .

Photometry

Discovery (first detection):
Discovery date: 2015-03-18 12:50:48.000
Flux: 22.95 ABMag
Filter: r2-HSC
Instrument: HSC
Telescope: Subaru

Remarks: The r-band Apparent magnitude was calculated by Richard Nowell using AstroImageJ and Aperture Photometry Tool. The reference star used is SDSS J120230.77-000703.8. The r-band Absolute magnitude of -14.71 was also calculated.

Last non-detection:
Archival info: SDSS

Details of the new object can be viewed here: https://www.wis-tns.org/object/2015fg