2022-03-28, 04:50 PM
Hi George,
Yes, the B-V color index is the difference between the blue (B) & visual (V) magnitude of objects measured through those filters. Red objects have very positive B-V values & blue objects have negative values. Other colors fall in between. I think the ST4v Help has an explanation. 'Color' is the parameter that you want to set for the Color Index.
Here's the part of the DBPS dialog that lets you select the Color Index range that you want. If you have the Tool Tips turned on & hover the cursor over this area, you'll get more info. [attachment=2305]
Hope this helps,
Phil S.
P. S. Sorry about the clouds.
Yes, the B-V color index is the difference between the blue (B) & visual (V) magnitude of objects measured through those filters. Red objects have very positive B-V values & blue objects have negative values. Other colors fall in between. I think the ST4v Help has an explanation. 'Color' is the parameter that you want to set for the Color Index.
Here's the part of the DBPS dialog that lets you select the Color Index range that you want. If you have the Tool Tips turned on & hover the cursor over this area, you'll get more info. [attachment=2305]
Hope this helps,
Phil S.
P. S. Sorry about the clouds.