[vsnet-alert 15209] New Mira variable?

[Seiichiro Kiyota]

Dear Observers,
#This might not be alert massage but it is new finding. Thus I posted it here.


Shizuo Kaneko (Kakegawa, Shizuaoka, Japan) found an variable object during his DSLR survey.


R.A. 05:48:08.14
Dec. +32:48:58.3 (2000.0)


20111211 13.3:
20111124 13.0:
20121118 <13.8
20121201 <14.3
20121208 12.6
20121218 12.3
20121222 12.1
time in U.T


Instruments
Canon EOS 5D Mark II  DSLR
f200mm/F2.8
ISO 1600

Shizuo checked several astronomical catalogs and found this object listed in USNO 2.0 (Mag(R)=14.8、Mag(B)=17.6), MSX5C, SDSS.
He checked AAVSO VSX and found no known variable star near this location.


Followings are photometric results of this object after Shizuo's notice.


Seiichiro Kiyota's (Tsukuba, Ibaraki, Japan) using remote telescope at Mayhill, USA.

201212240219 12.51V
201212240221 11.31Rc
201212240222 9.98Ic
201212240444 14.53B


Kenji Hirosawa (Inazawa, Aichi, Japan) CCD observations
20121224114302 12.31V
20121224114955 14.48B
20121224114511 10.01Ic
20121224114623 11.30Rc


Hiroyuki Maehara (Kiso, Nagano, Japan) checked his photometric data of survey with Camera Lens+CCD in V band (located in Kyoto)

Date       Time(UT) Vmag   Error
2012-12-13 15:18:18 13.109 0.234
2012-12-13 15:18:50 12.814 0.179
2012-12-13 15:20:06 12.857 0.192
2012-12-16 15:36:20 12.575 0.328
2012-12-18 15:51:08 12.724 0.173
2012-12-22 14:46:08 12.284 0.170
2012-12-06 15:49:22 <13.3 --
2012-12-06 15:49:52 <13.5 --
2012-12-06 16:28:44 <13.0 --
2012-12-06 16:29:14 <12.8 --
2012-12-10 15:45:14 <13.8 --
2012-12-10 15:45:46 <13.7 --
2012-12-10 15:55:40 <13.6 --
2012-12-10 15:56:10 <13.8 --


As this star are very red, it might be Mira variable or similar.



                       Seiichiro Kiyota (VSOLJ)
                       Tsukuba, Japan