[vsnet-alert 22579] Re: SV Sge fading

[Taichi Kato]

Re: SV Sge fading

> According to ASAS-SN, the object has now faded to
> 12.1 mag.

   This referred to g mag.

Recent data (only V mag for ASAS-SN).

  YYYYMMDD(UT)   mag  observer
  20180828.8722  105  (Eddy Muyllaert)
  20180828.9132  105  (Jose Ripero)
  20180829.9167  105  (Jose Ripero)
  20180829.969   106  (Gary Poyner)
  20180830.3969 10.414V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180830.3981 10.466V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180830.3994 10.428V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180831.4046 10.435V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180831.4059 10.418V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180831.4072 10.450V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180831.8639  106  (Eddy Muyllaert)
  20180831.9153  105  (Jose Ripero)
  20180902.8667  106  (Eddy Muyllaert)
  20180903.506   104  (Tsuneo Horie)
  20180903.5647 104cG  (Makoto Watanabe)
  20180904.9208  105  (Jose Ripero)
  20180905.908   107  (Gary Poyner)
  20180906.951   106  (Gary Poyner)
  20180907.9444  106  (Eddy Muyllaert)
  20180908.3585 10.590V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180908.3598 10.613V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180908.3610 10.601V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180910.8299  106  (Eddy Muyllaert)
  20180910.8840  105  (Jose Ripero)
  20180911.3603 10.687V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180911.3615 10.698V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180911.3628 10.675V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180911.8840  106  (Eddy Muyllaert)
  20180912.8743  105  (Jose Ripero)
  20180912.928   105  (Gary Poyner)
  20180913.8243  106  (Eddy Muyllaert)
  20180914.857   106  (Gary Poyner)
  20180914.8806  106  (Eddy Muyllaert)
  20180916.8208  106  (Eddy Muyllaert)
  20180917.2473 10.817V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180917.2485 10.815V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180917.2498 10.827V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180917.8194  105  (Eddy Muyllaert)
  20180917.862   107  (Gary Poyner)
  20180918.8250  106  (Eddy Muyllaert)
  20180921.835   107  (Gary Poyner)
  20180923.2822 11.025V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180923.2834 11.008V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180923.2847 11.001V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180923.835   106  (Gary Poyner)
  20180924.2349 11.038V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180924.2362 11.061V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180924.2375 11.044V  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
  20180924.8424  106  (Eddy Muyllaert)
  20180924.844   105  (Gary Poyner)
  20180926.8083  106  (Eddy Muyllaert)
  20180927.8118  107  (Eddy Muyllaert)
  20180928.8799  109  (Eddy Muyllaert)
  20180928.835   113  (Gary Poyner)
  20180929.842   114  (Gary Poyner)

John Toone in baavss-alert:
SV Sge has faded a magnitude in the latter part of September:

16 Sep 2018    2124GMT    10.5mv
17 Sep 2018    2031GMT    10.6mv
23 Sep 2018    2102GMT    11.1mv
24 Sep 2018    1950GMT    11.2mv
25 Sep 2018    2107GMT    11.4mv
28 Sep 2018    1936GMT    11.5mv

The last deep fade (<15.8) was in 2004 and the last minor fade (11.9) was
in 2005. Since 2008 its ranged between 10.2 and 11.1mv.