I am studying CSS_J032404.3+211344 for my master's project and trying to find a clear classification for it.
I chose this target rather arbitrarily based on observability for the Liverpool Telescope (LT) over a period last year and have some limited observations (16 each in g and r band) from whch I have done some basic analysis. I found out there is some good V-band photometry data in the ASA-SN catalogue: https://asas-sn.osu.edu/variables/b6fab4cc-5f1b-57b4-b5eb-75355d20a707
The star is also in the AAVSO catalogue: https://www.aavso.org/vsx/index.php?view=detail.top&oid=365549 and classified as CWA.
However the ASA-SN catalogue info categorises it as unclassified with a classification probability of 0.351 (not sure exactly what that means as I can't find any references to to labeling in the catalogue). Further ASA-SN states the distance as 7837pc.
My calculations from LT data give a period of 14.65days and Vmag 16.54 (using SDSS conversion V = g-0.59(g-r)-0.01)
Assuming it's CWA I used a couple of different P-L relations for W Virginis/CWA which yielded distance of ~70,000pc (versus the 7837pc in ASA-SN)
So my question is: is the a clear classification for the star (as per AAVSO) or is it uncertain (as per ASA-SN) and does anyone know what ASA-SN uses to estimate the distance (eg what P-L relation)?
Thanks in anticipation for your help.
I don't have an immediate answer to your question, but I see that VSX references the Catalina survey. Have you been able to track down the Catalina data to see what their light curve looks like? One can also try a new data search at the position of the variable on the ASA-SN website to see if you come up with more observations than are included in their variable star catalog. Sometimes additional data obtained in that fashion allow for an improved period search.
Are you the Horace Smith who has written extensively on RR Lyrae? I used some of your references in a case study on RR Lyrae for my course!