[vsnet-chart 387] Re: [vsnet-chat 5190] The future of charts and sequences

[Pete1199@aol.com]

In a message dated 3/1/02 1:52:18 AM Eastern Standard Time, 
mikesimonsen@mindspring.com writes:

<< The decision has been made to finish a long list of charts for stars that
 previously had no sequences or charts available first. Recently, charts
 (standard and reversed) for 98 eclipsing binaries and 40 RR Lyr stars were
 released. >>

Mike:
    I hope there was no one out there who did not observe an eclipsing binary 
because a "good" chart did not yet exist. Whatever sequence used for EBs 
should be of no concern to anyone other than the observer (unless the 
estimates from different observers are to be combined to create a light 
curve, in which case the observers should use the same sequence). The goal is 
the timing of the eclipse, not  the estimate of the star's brightness. 
Therefore, as long as the sequence enables the observer  to judge accurately 
the changes in brightness it is a good sequence. I always felt the problem 
with the AAVSO EB charts were not the sequences used but the fact that the 
charts left out many of the stars in the field, making the identification of 
the variable nearly impossible (until the eclipse began at least).
   You and the others involved in straightening out the many AAVSO charts in 
need of fixing are doing a great job that needs doing. But is it necessary in 
the case of eclipsing binaries?

Pete Guilbault

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp