calc_vmag#

stellarphot.differential_photometry.calc_vmag(var_stars, star_data, comp_stars, band=None, star_data_mag_column='mag_inst')[source]#

Calculate the average magnitude and standard deviation of a variable star in field.

Parameters:

var_stars‘~astropy.table.Table’: Table of variable stars known in field. It should contain a column called coords with the coordinates for each variable star as astropy SkyCoord objects.
star_data‘~astropy.table.Table’: Table of star data from observed image(s). One column should be named band and contain the passband in which observations were done. The column containing instrumental magnitudes is passed in with the argument star_data_mag_column.
comp_stars‘~astropy.table.Table’: Table of known comparison stars in the field, given by AAVSO. The column containing the reference magnitudes for the filter specified by filter is passed in with the argument comp_star_mag_column.
bandstr: Filter/passband in which magnitude is being calculated.
star_data_mag_columnstr, optional: Name of the column containing the instrumental magnitudes in star_data.

Returns: