Discovery certificate for object 2021gby
TNS Astronomical Transient Report No. 102818 [ 2021TNSTR.799....1T ]

Date Received (UTC): 2021-03-18 16:57:00
Sender: ATLAS (ATLAS_Bot1)
Reporting Group: ATLAS     Discovery Data Source: ATLAS

J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, M. Fulton, J. Gillanders, C. Webb (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO) report/s the discovery of a new astronomical transient.

IAU Designation: AT 2021gby
Discoverer internal name: ATLAS21iib
Coordinates (J2000): RA = 11:35:42.374 (173.92656) DEC = +20:51:03.18 (20.8508833333)
Discovery date: 2021-03-18 09:14:24.000 (JD=2459291.885)



Photometry

Discovery (first detection):
Discovery date: 2021-03-18 09:14:24.000
Flux: 19.598 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-02
Telescope: ATLAS Haleakala

Last non-detection:
Last non-detection date: 2021-03-04 15:47:31
Limiting flux: 16.74 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-02
Telescope: ATLAS Haleakala


Details of the new object can be viewed here: https://www.wis-tns.org/object/2021gby