张宓 XM17MZ = AT 2019vsn ? M31变星

The outburst of a variable star candidate

Mi Zhang and Xing Gao, report the discovery of a variable star candidate (mag approximately 19.7) on several 300-s survey images (limiting mag about 20.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Nov. 17.61278 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=00h41m42.38s +41d21’31”.1 (equinox 2000.0). Which is about 698.4″ west and 322.6″ north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Nov. 02.64078 UT(limiting mag 20.0).
NET USNO-A2.0
XM17MZ C2019 11 17.61278 00 41 42.38 +41 21 31.1 19.7R C42

发表评论

必填项已用*标注