[Aavso-photometry] Comp Star Options for the HMXB V420 Aur aka LPH040

[Tim Crawford]

We have confirmed that the "k" star on this chart is a variable (tentatively an EB) and that the "b" star is a variable suspect.

Dr. Gordon Sarty has requested that the following stars be used, at this point:  f,h,j,m & o. 

It would also be preferable if you could use the h star as the check star, at this point (although this suggestion is not on the chart) and not included within the ensemble.

FYI, to get a 3 star ensemble in my fov I have no choice but to use the f,j & g stars keeping the h star as a check and out of he sequence.  While the "g" star is a bit redder than Dr. Sarty would like to be safe, so far we have not detected any problems with this star.

Dr. Sarty tells me that he has now made some new notes on the chart (LPH040)

http://homepage.usask.ca/~ges125/AAVSO_HMXB_Charts.html

I apologize to all for any misunderstandings and confusion... it simply happens that sometimes we discover comps are variable, regardless of the high quality of the original sequence.

Per Ardua ad Astra

Tim Crawford CTX
Arch Cape Observatory