Discovery certificate for object 2021clj
TNS Astronomical Transient Report No. 98976 [ 2021TNSTR.412....1R ]

Date Received (UTC): 2021-02-10 00:23:24
Sender: Mr. Mi Zhang
Reporting Group: XOSS     Discovery Data Source: XOSS

Jiangao Ruan, Xing Gao (Xingming Observatory) report/s the discovery of a new astronomical transient.

IAU Designation: AT 2021clj
Discoverer internal name: XN02JR
Coordinates (J2000): RA = 00:42:48.270 (10.701125) DEC = +41:19:37.40 (41.327056)
Discovery date: 2021-02-09 13:11:11.000 (JD=2459255.0494329)


Remarks: Jiangao Ruan, Xing Gao (Xingming Observatory), report the discovery of a possible nova (mag approximately 18.0) on several 300-s survey image (limiting mag about 19.5) taken by Xing Gao at Xingming Observatory #3 (N88) around Feb. 09.54943 UTC using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=00h42m48.27s +41d19’37”.4 (equinox 2000.0). Which is about 44.5" east and 208.9" north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Feb. 06.55062 (limiting mag 19.5) . Images can be found at: http://xjltp.china-vo.org/xn02jr.html

Photometry

Discovery (first detection):
Discovery date: 2021-02-09 13:11:11.000
Flux: 18 ABMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope).

Last non-detection:
Last non-detection date: 2021-02-06 13:12:54
Limiting flux: 19.5 ABMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope).

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