Using pyphot filter library

This page shows the content of the pyphot library with the respective properties of the passband filters. The code to generate the table is also provided in hdf5test.cpp.

You can download the pyphot library using cphot::download_pyphot_hdf5library and use the cphot::HDF5Library interface.

A short example below shows how to use that library.

#include <cphot/io.hpp>
#include <cphot/library.hpp>
 
// where to save the file
std::string filename = "pyphot_library.hdf5";
cphot::download_pyphot_hdf5library(filename);
// use the library (like in pyphot)
cphot::HDF5Library lib = cphot::HDF5Library(filename);
std::cout << lib << "\n";
auto f = lib.load_filter("HST_WFC3_F160W");
f.info();

Library content

• name: cphot::Filter.get_name()
• detector type: energy or photon counter cphot::Filter.is_photon_type()
• wavelength units: filter are internally defined in nm
• central wavelength: cphot::Filter.get_cl()
• pivot wavelength: cphot::Filter.get_lpivot()
• effective wavelength: cphot::Filter.get_leff()

Zeropoints are defined for Vega, AB, and ST systems, while also accounting for the detector type.

• <X> mag: magnitude in the X system; cphot::Filter.get_Vega_zero_mag(), cphot::Filter.get_AB_zero_mag(), cphot::Filter.get_ST_zero_mag()
• <X> flux: flux in \(flam = erg/s/cm^2/\unicode{x212B}\) in the X system; cphot::Filter.get_Vega_zero_flux(), cphot::Filter.get_AB_zero_flux(), cphot::Filter.get_ST_zero_flux()
• <X> Jy: flux in Jansky ( \(Jy\)) in the X system; cphot::Filter.get_Vega_zero_Jy(), cphot::Filter.get_AB_zero_Jy(), cphot::Filter.get_ST_zero_Jy()

Pyphot Filter Library