J.J. ZanazziEd AndersonNorthern Arizona UniversityArizona Space Grant Consortium

The first extra-solar planet that was discovered around a “sun-like star” was 51 Pegasi b

Was discovered by Michel Mayor and Didier Queloz using the radical velocity method

Many different methods for discovering extra-solar planets Radical Velocity Method(Redshift) Astrometry Extra-Solar Planetary Transits

Used Extra-Solar Planetary Transits

Analyzed Photometric Data taken by Pr. Shliegh

Star 0 = GJ 437Star 1 = HIP 57103Star 2 = USNO-B1.0 1167-00204224Star 3=GSC 01984-02056Star 4=11:42:20.08 +26:49:43.20

Verify or refute previous data

Went to the NURO Observatory to take photometric data of transiting planet and the suspicious comparison stars with Ed Anderson▪ Used Observatory’s 31 in. telescope

Took two control data sets, when planet was known to be not transiting, and one data set in which planet was transiting

Did differential photometry on stars’ magnitudes

Used Image Reduction and Analysis Facility (IRAF) to analyze photometric data

Dip in Magnitude Detected in the previous data is 200% greater than what other data has shown

“Transit” detected is a day long, when other data shows the transit to be one hour long

Results Refute Previous Data

Ed AndersonSharon ShlieghKathleen StigmonNASA Arizona Space Grant

ConsortiumPhysics and Astronomy Department

at Northern Arizona University