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Goto Images from 2007-05-19

Further Base Line Observations of HAT-P-2 , Parent Star to Exosolar Planet

A further series of baseline images of HAT-P-2 (host star to exosolar planet HAT-P-2b) were acquired through R filters.

(Description of earlier baseline series of 2007-05-07 / 2007-05-14 

Set of R Band images were acquired with 15s exposure at airmass values of 1.12, 1.08 and 1.04. Average S/N value for HAT-P-2 was 212, 213  & 217 (compared to average of 217 measured on 2007-05-07, and average value of 212 on 2007-05-14). 

The calculated R Band magnitude for HAT-P-2 was 8.37 +/-0.01 from an initial 15 minute run. This is very similar to value of 8.36 +/-0.01 calculated for a 15 minute run on 2007-05-14, 8.36 +/- 0.01 calculated for a run on 2007-05-07. (these values can be compared with an expected R Band magnitude of 8.47, based on Arne Equations & catalog Bt, Vt values).  A second and third run produced a calculated magnitude of 8.35 +/- 0.01 and 8.33 +/- 0.01.   These show up a small drift in calculated magnitude associated with errors caused by weaknesses in the flat field reduction. 

Plotting the difference between calculated HAT-P-2 magnitude of individual images and average HAT-P-2 magnitude in shows a range from -0.015 to +0.016 (or a SD of 0.007).  

HAT-P-2, Reference Stars

Annotated CCD Image  20s, 2x2 binning, R Filter 2007-05-07 23:31 hUT (#196065)

Analysis of HAT-P-2 Base Line Images (R Band)

HAT-P-2  - Comparison between datasets on 2007-05-07 and 2007-05-19

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