pynrc.nrc_utils.gen_unconvolved_point_source_image

pynrc.nrc_utils.gen_unconvolved_point_source_image(nrc, tel_pointing, ra_deg, dec_deg, mags, expnum=1, osamp=1, siaf_ap_obs=None, add_offset=None, **kwargs)[source]

Create an unconvolved image with sub-pixel shifts

Parameters:

  • nrc (NIRCam) – NIRCam instrument class for PSF generation.

  • tel_pointing (webbpsf_ext.jwst_point) – JWST telescope pointing information. Holds pointing coordinates and dither information for a given telescope visit.

  • ra_deg (ndarray) – Array of RA positions of point sources in degrees.

  • dec_deg (ndarray) – Array of Declination of points sourcesin degrees.

  • mags (ndarray) – Magnitudes associated with each RA/Dec position. Corresponds to nrc.bandpass.

Keyword Arguments:

  • expnum (int) – Exposure number to use in tel_pointing.

  • osamp (int) – Output sampling of image.

  • siaf_ap_obs (pysiaf Aperture) – Option to specify observed SIAF aperture. Otherwise defaults to nrc.siaf_ap.

  • add_offset (tuple or None) – If specififed, then will add an additional ‘idl’ offset to source positions.

  • sp_type (str) – Spectral type to assume when calculating total counts. Defaults to ‘G0V’.

  • mag_units (str) – Assumed magnitude units of mags. Default assumes ‘vegamag’.