Re: GSC 3493-1324

[Sebastian Otero <varsao@fullzero.com.ar>]

> A one day error is not likely for this date.

Well, I think it is more unlikely that the observations fit exactly (and I
mean exactly) at the secondary eclipse (as Patrick said).
The observations are made at HJD:

3110.8440 11.275
3110.8456 11.259
3110.8473 11.278

instead of

3109.8440 11.275
3109.8456 11.259
3109.8473 11.278

These are already converted to HJD. It would be a good idea to make this
convertion beforehand as in the ASAS database. (NSVS is worse: MJD !!
;-((  )

See the magic happening in the new lightcurve.

Actually this is good news: TASS data weren't bad, on the contrary, they
were very good datapoints so you were right on this regard and I was right
on the period.

So I think the discussion is over. We all learn something from here.

Cheers,
Sebastian.



















That is nothing funny has
> happened to the computer clocks this year except that  I have caught the
> TOM1 computer jumping several hours.  This seems to happen when the
> computer has been sitting idle for a day or so.  If the computer jumped
> several hours, then the pipeline would simply not find stars.  This also
> holds true for a one day off clock.  The star fields would be unlikely to
> match close enough and no data would come out of the pipeline.  Since
there
> is lots of data, one can look at known variables in the data and compare
> them to known phases.  Should give a clue.
>
> While anything is possible, I think a one day error is unlikely.
>
> Tom Droege
>
>
> > [Original Message]
> > From: Patrick Wils <patrickwils@yahoo.com>
> > To: tass@listserv.wwa.com <tass@listserv.wwa.com>
> > Date: 6/5/2004 8:41:36 PM
> > Subject: Re: GSC 3493-1324
> >
> > >   I looked at the sample comparison star Michael mentioned,
> > > GSC 3493-1088, on the same night (and other nights).  It does
> > > NOT become dimmer on the night of JD 2453109, in either V or I.
> >
> > Well, maybe the magnitudes are OK, but the date may be off.  If those
> > three points are shifted 1 day to JD 2453110, they fall exactly in
> > phase with the secondary eclipses according to Sebastian's period !
> >
> > Patrick

GSC_3493_1324_NSVS.gif