Star Field Simulation

Stot distribution changed to a skewed Gaussian so there are more dim stars than bright stars


Shape function fixed to be more realistic. Adds the effect of an unfocused image.


Also, a globular option was implemented.


Tested the ability of the star finding algorithm with dense star fields



Profiles of Stars

Simulated Data


The sigma for these two stars when using two separate sigma parameters in fit are 8.987 and 9.072, which corresponds to a size of 5.47'' and 5.52''. In comparison, the FWHM corresponds to 6.51''.

This was repeated for real data


The sigma for these stars are 1.8413 and 1.8473 pixels, which correspond to a size of 1.12'' and 1.13''.

Topic attachments
I Attachment Action Size Date Who Comment
PNGpng Accept-reject_monte_carlo_Stot_Skewed_distribution.png manage 82.0 K 30 Nov 2017 - 18:23 BekiChafer Stot Distribution
PNGpng Analysis_of_Density_of_Stars.png manage 63.3 K 30 Nov 2017 - 22:06 BekiChafer Plot of Counted Stars versus true number of stars
PNGpng Globular_Simulation.png manage 4.1 K 30 Nov 2017 - 21:07 BekiChafer  
PNGpng Profile_of_Multiple_Simulated_Stars.png manage 32.4 K 30 Nov 2017 - 22:11 BekiChafer Profile of multiple stars from simulated data
PNGpng RealDataMultiple_stars.png manage 33.1 K 30 Nov 2017 - 22:17 BekiChafer Profile of multiple stars from real data
PNGpng Star_Density_Analysis.png manage 65.2 K 30 Nov 2017 - 22:03 BekiChafer Plot of density of star field versus the difference between counted stars and true value
PNGpng Unfocused_Image.png manage 17.8 K 30 Nov 2017 - 22:00 BekiChafer Simulated unfocused star field
PNGpng ZoomedIn.png manage 29.3 K 30 Nov 2017 - 22:12 BekiChafer Zoomed in image of dimmer star from graph

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Topic revision: r2 - 30 Nov 2017 - BekiChafer

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