[vsnet-chat 5113] Re: [vsnet-obs 38590] Observations of 02/21/2002

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Re: [vsnet-obs 38590] Observations of 02/21/2002

> Dear Jose,
> 
> Are you sure about the following observations you reported in vsnet-obs
> 38590?
> 
> 
> > GEMU        020221.9514     11.2        IN  OUTBURST !
> > CNCSY       020221.9521     11.9        IN  OUTBURST !
> > CVNCSY      020221.9528     12.6
> >
> 
> Observers worldwide reported fainter magnitudes of U Gem already
> yesterday (around 13.0) and this night I observed this star at 13.5.
> I observed SY Cnc a few hours later then you did, but I saw no outburst.
> I observed this star at 13.6.

   Well, no surprise..  This is clearly another instance of "Ripero Delay".
One may have noticed that decay (or sometime rise) of dwarf nova outbursts
sometimes experiences significant delays in Ripero's observations.
People call it "Ripero Delay"...

   Another example (recent IR Gem outburst):

  YYYYMMDD(UT)   mag  observer
  20020213.882   121  (Maciej Reszelski)
  20020213.885   126  (Gary Poyner)
  20020214.466  <140  (Peter Nelson)
  20020214.849   137  (Eddy Muyllaert)
  20020214.910   126  (Jose Ripero)         ***
  20020215.820   127  (Jose Ripero)         ***
  20020215.864  <142  (Eddy Muyllaert)
  20020215.885   140  (Maciej Reszelski)
  20020216.815  <136  (Jose Ripero)
  20020216.842  <142  (Eddy Muyllaert)
  20020216.850   158: (Maciej Reszelski)
  20020216.917  <138  (A. Sucker)
  20020217.823  <136  (Jose Ripero)
  20020217.835  <142  (Eddy Muyllaert)
  20020217.849  <153  (Maciej Reszelski)
  20020218.203  <145  (Mike Simonsen)
  20020218.819  <142  (Eddy Muyllaert)

  SY Cnc:

  YYYYMMDD(UT)   mag  observer
  20020202.255   108  (Mike Simonsen)
  20020202.867   116  (Georg Comello)
  20020202.873   112  (Eddy Muyllaert)
  20020202.887   107  (Pavol A. Dubovsky)
  20020202.919   114  (Michel Verdenet)
  20020202.937   112  (Wolfgang Kriebel)
  20020202.971   118  (Maciej Reszelski)
  20020203.867   112  (Pavol A. Dubovsky)
  20020203.942   112  (Eddy Muyllaert)
  20020204.828   114  (Pavol A. Dubovsky)
  20020204.951   113  (Jean Gunther)
  20020204.981   112  (Maciej Reszelski)
  20020205.160   111  (Erwin van Ballegoij)
  20020205.858   113  (Pavol A. Dubovsky)
  20020205.872   114  (Eddy Muyllaert)
  20020205.938   115  (Jose Ripero)
  20020205.982   111  (Hazel McGee)
  20020206.942   116  (Gary Poyner)
  20020207.047   116  (Erwin van Ballegoij)
  20020208.026   118  (Erwin van Ballegoij)
  20020208.219   115  (Mike Simonsen)
  20020208.867   115  (Eddy Muyllaert)
  20020209.842   123  (Georg Comello)
  20020209.917   119  (Eddy Muyllaert)
  20020210.017   119  (Erwin van Ballegoij)
  20020210.890   118  (Bjorn H. Granslo)
  20020212.876   131  (Georg Comello)
  20020213.823   134  (Georg Comello)
  20020213.837   127  (Maciej Reszelski)
  20020213.891   133  (Gary Poyner)
  20020213.969   131  (Adrian Sonka Bruno)
  20020214.848   137  (Georg Comello)
  20020214.858   135  (Eddy Muyllaert)
  20020214.938   113  (Jose Ripero)          ***
  20020215.798   135  (Georg Comello)
  20020215.869   123  (Jose Ripero)
  20020215.872   135  (Eddy Muyllaert)
  ...

  Close examination of every dwarf nova light curve can often reveal one
or two instances.

Regards,
Taichi Kato

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