Eclipsing Binaries (EBs)

Hi All;

I'm new to EB and have just run my first two time series on ST Tri. From the Time Series Analysis report, I see the error bars on the Target Magnitude Graph, which arequite small, but I also see Std numbers for the Target Magnitude of 0.258 which is pretty large. Is this 'Std' number considered to be the 'error' for the Target observations in a Time Series?  If this is the case, are there different standards for evaluating Time Series results versus the following which, I believe, apply to variable stars analysis in general:

error: < 0.015 - excellent

Hi

I just uploaded 30 images in a time series. The upload seemed to go fine and all image disappeared from the upload screen. But now, nearly an hour later, none of the images appears in my Image List. VPHOT indicates that there is not work in the Que so I's puzzled where my images went and whether I should be using the AIJ Macro for uploading and analyzing rather than VPHOT.

Suggestions and Advice would be helpful.

Thank you and Happy Holidays..

Gary

Explain please, why bright ELL binary V365 Lac is used as comparison star?

It is with profound sorrow that I announce the passing of Dr. Robert H. Nelson on November 2nd after a long term battle with

cancer.   He is survived by his wife Lois and three adult children.  Bob was a prolific investigator of eclipsing binary systems

for over 25 years, having published well over 100 papers on the subject.  He is probably best known for his database of

For those of you who are familiar with AstroImageJ (AIJ), a capability has been added to the latest daily build that allows the user to create a variable star report that conforms with the AAVSO International Database (AID) format for both single comparison stars, as well as for an ensemble of comparison stars. I want to thank Ken Menzies and others who have helped with the testing.

AAVSO Alert Notice 791 announces an observing campaign on the eclipsing triple-system b Per. Please see the notice for details and observing instructions.

There are threads for this campaign under the following forums:

- Campaigns and Observing Reports: https://www.aavso.org/b-per-sep-2022-eclipse
- Eclipsing Binaries: https://www.aavso.org/b-per-sep-2022-eclipse-01

Hi All,

For practice, I have obtained BVRI photometry on CN And for a primary eclipse and a secondary eclipse.  I am writing a program to fit the photometry near the minima to a parabola to determine the ToMs.  I do this separately for all for bands.  I also compute the errors on the parabola parameters and can thus compute the error on the ToM. For the secondary I get:

B: 2459561.1043 +/- 0006  (HJD)

V: 2459561.1027 +/- 0.004  (HJD)

R: 2459561.1033 +/- 0.003  (HJD)

I:  2459561.1028 +/- 0.005  (HJD)

Hello everyone, my name is Kevin Alton

Hi All,

Just wanted to (re) introduce myself to this section of AAVSO.  My name is Anthony (Tony) Shoup.  I was a member of this section back around 1995-2005.  I rejoined AAVSO about 1 year ago.  I am currently working on my observing equipment/software/techniques as applied to differential photometry and (hopefully in the near future) radial velocities of EBs.  I plan to retire in about 3 years and devote most of my time then to EBs (to keep my wife sane :) ).

I really look forward to contributing to this section (maybe slowly at first).  Tony...

Is there any software or website that predicts EB eclipses? For example, I want to know the next eclipses of any EB, I put the name, the current date and time, my location and it gives me the next eclipses of that search.

Att,

Eurimar Araújo