Skip to main content

new YSO campaign

4 posts / 0 new
Last post
pox
pox's picture
new YSO campaign

Just throwing this idea out to gauge the feeling... I have just run a query on a result set from VSX for suspects (overwhelmingly NSV stars) where the type begins with a capital I (so IA, INS etc) and after narrowing the set down have a likely list of about 80 stars suitable for visual observation.

I am aware that many NSV stars are 'dubiously variable' so have selected those with amplitudes in excess of about 0.6mv, though several are accredited with larger A. If anyone is interested I can supply either a CSV list or an access db query.

I will probably start with those NSV stars that are in the same fields as existing YSOs for which we have charts. There is a wide range of brightnesses - even a couple of binocular stars.

Sebastian Otero
Sebastian Otero's picture
Narrowing down the candidate lists

Hi Mike,
Sorry I did not reply to your message about the UXOR campaign yet. I wanted to have more news to give you and with other tasks and issues that came up the delay become too long!

I have been updating stars classified as E or E: with no periods in VSX the past weeks to get rid of spurious objects and end up with a list of potential UXOR candidates.
In the process I have added periods to some E that ended up as being confirmed EAs and I have also found many semiregular variable stars wrongly classifed as eclipsers (probably that classification was simply based on a few photographic plates showing bright and faint states).
So after I clean up the list I will do a color plot to show the best candidates and get back to you.

Cheers,
Sebastian
 

MJB
MJB's picture
list

please send me what you have for this and the UXOR campaign.  Thanks.  

 

pox
pox's picture
nsv stars latest

OK... none of the stars on the 'small' list are YSO's (had a funny feeling there wouldn't be many!) but now having a bit more time, I shall go through the more extensive list I have here and have a look at the colours to determine if any of them show IR excess. So, on with the deerstalker and out with the magnifying glass.

Log in to post comments
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484