POSSIBLE NOVA IN M81

Zhijian Xu and Xing Gao report the discovery of a possible nova in M81. The transient is approximately Mag. 20.6 on severl 300-s survey images (limiting mag about 21.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Apr. 09.62859 UT using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=09h55m52.69s +68d58'40".9 (equinox 2000.0). Which is about 104.7" east and 314.1" south of the center of the M81. Nothing is visible at this position on archival images taken on Apr 07.59439 (limiting mag 21.5).

All images can be seen from: http://www.xjltp.com/XOSS/XMr5ZX/XMr5ZX.htm.

NET UCAC-4

XMr5ZX C2018 04 09.62859 09 55 52.69 +68 58 40.9 20.6 V C42.

Xingming Observatory(C42) - NEXT, Mt. Nanshan, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

 

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Discovery image taken by C42 on Apr.09.62859 UT,2018

DSS IMAGE

Archival images