[vsnet-chat 7335] revision of 14 MISAO new variables

[Seiichi Yoshida]

Dear colleagues,

I am researching further observations of the MISAO Project new
variable stars from the CCD images taken after their discovery.

Here I report the revision of 14 MISAO new variables.

  http://www.aerith.net/misao/index.html

MisV0129  13.0-15.8C  M  P=310:  Epoch=2453290:
  Based on the unfiltered CCD observations from 1999 to 2004 by
  Ken-ichi Kadota and Nobuo Ohkura, it was revealed to be a Mira
  variable with a large variation of 13.0 - 15.8 mag, and a period of
  about 310 days.

MisV0197 = V720 Cep  10.1-15.8C  M  P=305:  Epoch=2452150:
  Based on the unfiltered CCD observations from 1999 to 2004 by
  Ken-ichi Kadota and Nobuo Ohkura, it was revealed to be a Mira
  variable with a large variation of 10.1 - 15.8 mag, and a period of
  about 305 days.

MisV0198 = V2464 Cyg  12.4-14.7C  M  P=185:  Epoch=2451860:
  Based on the unfiltered CCD observations from 1999 to 2003 by
  Ken-ichi Kadota and Nobuo Ohkura, it was revealed to be a Mira
  variable with a large variation of 12.4 - 14.7 mag, and a period of
  about 185 days.

MisV0368 = V2271 Cyg  12.1-13.0C  SR  P=100  Epoch=2451325
  The NSVS data revealed that it is a semi regular variable with a
  range of 12.7 - 13.5 mag, and a period of 100 days. The unfiltered
  CCD observations from 1999 to 2000 by Ken-ichi Kadota and Nobuo
  Ohkura coincided to the magnitude range and the period.

  However, it was observed as 15.4 mag, much fainter than the range,
  in the course of the unfiltered CCD observations by Nobuo Ohkura
  using a 300-mm camera lens in 2003 September. It is uncertain if the
  star really faded drastically, or that is an effect of came lens
  characteristics.

MisV1210 = V968 Cas  12.9-13.7C  SR:
  During the survey from Oct. 9 to Dec. 7 in 2003, it was almost
  constant at 13.3 mag until Nov. 4, but fading gradually down to 13.5
  mag after that.

MisV1211 = LX Cam  11.5-14.0C  M:
  It brightened up to 11.5 mag in 2001 November, and faded down to
  14.0 mag in 2003 November. The magnitude range was enlarged, and it
  was revealed to be a Mira variable, not a semi regular variable.

MisV1212 = V682 Per  12.4-15.5C  M:
  During the survey from Oct. 9 to Dec. 7 in 2003, it was brightening
  gradually from 15.5 mag to 14.2 mag.

MisV1213 = V679 Per  10.9-14.2C  M:
  It brightened up to 10.9 mag in 2003 October. The magnitude range
  was enlarged, and it was revealed to be a Mira variable, not a semi
  regular variable.

MisV1214 = V684 Per  12.8-16.0C  M:
  During the survey from Nov. 4 to Dec. 7 in 2003, it was brightening
  linearly from 16.0 mag to 13.6 mag, and the magnitude range was
  enlarged.

MisV1246 = V448 And  10.4-12.8C  M:
  During the survey from Oct. 25 to Dec. 3 in 2003 with an IR-cutting
  filter, it was fading linearly from 12.3 mag to 14.1 mag. The
  magnitude range was enlarged, and it was revealed to be a Mira
  variable, not a semi regular variable.

MisV1263  13.0-15.9C  M:
  It faded down to 15.9 mag in 2003 September. The magnitude range was
  enlarged, and it was revealed to be a Mira variable, not a semi
  regular variable.

MisV1315  10.2-12.5C  M:
  During the Rc-band survey from Nov. 19 to Dec. 14 in 2004, it was
  brightening linearly from 13.1 mag to 12.1 mag.

MisV1319  11.3-13.2C  M  P=170  Epoch=2451480
  During the survey from Oct. 21 to Nov. 25, it was fading linearly
  from 12.1 mag to 13.1 mag.

  The NSVS data revealed that it is a Mira variable with a period of
  170 days.

MisV1325  13.5-14.3C  E?
  It was fainter than 14.1 mag in March and December in 2000. But
  after that, it has been almost constant around 13.6 mag since 2001
  until 2007. So it can be an eclipsing variable.

  It cannot be a red variable based on the USNO-A2.0 color (B-R = 0.6
  mag).

Best regards,

--
Seiichi Yoshida
comet at aerith.net
http://www.aerith.net/