nircam_short_footprint

jwst_novt.footprints.nircam_short_footprint(ra, dec, pa, *, v2_offset=0.0, v3_offset=0.0, include_center=True, apertures=None)[source]

Create NIRCam short channel footprint regions in sky coordinates.

The NIRCam center and PA offset angle are determined from the NRCALL_FULL aperture. Apertures appearing in the footprint are, by default:

  • NRCA1_FULL

  • NRCA2_FULL

  • NRCA3_FULL

  • NRCA4_FULL

  • NRCB1_FULL

  • NRCB2_FULL

  • NRCB3_FULL

  • NRCB4_FULL

Parameters:

  • ra (float) – RA of NIRCam center, in degrees.

  • dec (float) – Dec of NIRCam center, in degrees.

  • pa (float) – Position angle for NIRCam, in degrees measured from North to central vertical axis in North to East direction.

  • v2_offset (float, optional) – Additional V2 offset in telescope coordinates to apply to instrument center, as from a dither pattern.

  • v3_offset (float, optional) – Additional V3 offset in telescope coordinates to apply to instrument center, as from a dither pattern.

  • include_center (bool, optional) – If set, the center is marked with a Point region. If not, only the apertures are included in the output.

  • apertures (list of str, optional) – If set, only the specified apertures are returned.

Returns:

footprint – NIRCam footprint regions. NIRCam center is marked with a Point region; all other apertures are marked with Polygon regions. Output regions are in sky coordinates.

Return type:

regions.Regions