Photometric Studies of Two Active Contact Binaries: GSC 2766-0775 and GSC 0619-0232

Details Photometric Studies of Two Active Contact Binaries: GSC 2766-0775 and GSC 0619-0232 Photometric Studies of Two Active Contact Binaries: GSC 2766-0775 and GSC 0619-0232

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915109s&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #151.09; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present preliminary analyses of two interacting eclipsing binaries based on observations taken at the National Undergraduate Research Observatory (NURO) and the Southeastern Association for Research in Astronomy (SARA) in the fall of 2005 and 2006. Light curves, period studies and synthetic light curve solutions are presented.
Our CCD observations of GSC0619-232 [α(2000) = 01h18m48.501s,δ(2000) = +13°21'07.81"] and GSC 2766-0775 [α(2000) = 23h37m10.660s,δ(2000) = +31°36'44.48"] were taken in the Fall of 2005 and 2006 with the NURO 0.81-m and the SARA 0.9-m reflectors and standard UBVRI filters.
GSC0619-0232 is a totally eclipsing, low amplitude, low mass ratio, short period AW UMa-type system. Calculated eclipse timings included HJD Min I = 2453638.98501(±0.004), 2453643.7976(±0.0087), HJD Min II = 2453639.8350(±0.0040), 2453641.9055(±0.0049), and 2453643.9642(±0.0011). These including five times by Gonzalez-Rojas et. al (2003, IBVS 5437) from their discovery paper, yielded the following ephemeris:
HJD Hel Min I =2452668.3011 (±.0.0008)d + 0.3439685 (±0.0000004)*E
GSC 2766-0775 is a solar type contact binary, discovered by the Semi-Automatic Variability Search. Our light curves during the 2005 and 2006 seasons show variable eclipse amplitudes of 0.70 and 0.76 mags in B for the "first" and "second" eclipses in 2005 and 0.7 and 0.5 mags in the same eclipses in 2006. A dark region dominates at phase 0.25 in 2005 and 0.75 in 2006, and a cooling of 0.05 in B-V of the binary is present. Calculated times of minimum light include HJDMin I=2453643.9871(±0.0002)d, 2454018.8517(±0.0004)d and HJDMin II=2453643.8008(±0.001389)d, 2454018.6649(±0.0018)d. The following improved elements were calculated:
HJD Hel Min I =244018.852168 (±.0.0016)d + 0.3757428 (±0.0000015)*E
Light curve solutions are calculated with the updated, 2004 Wilson code.
We wish to thank the NURO and SARA for their allocation of observing time, as well as NASA and the American Astronomical Society for their support.

Affiliated with

Also associated with

No associations

Rating

Photometric Studies of Two Active Contact Binaries: GSC 2766-0775 and GSC 0619-0232 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Photometric Studies of Two Active Contact Binaries: GSC 2766-0775 and GSC 0619-0232, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric Studies of Two Active Contact Binaries: GSC 2766-0775 and GSC 0619-0232 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1161835