nirspec_footprint

jwst_novt.footprints.nirspec_footprint(ra, dec, pa, *, include_center=True, apertures=None)[source]

Create NIRSpec footprint regions in sky coordinates.

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

  • NRS_FULL_MSA1

  • NRS_FULL_MSA2

  • NRS_FULL_MSA3

  • NRS_FULL_MSA4

  • NRS_FULL_IFU

  • NRS_S200A1_SLIT

  • NRS_S200A2_SLIT

  • NRS_S400A1_SLIT

  • NRS_S1600A1_SLIT

  • NRS_S200B1_SLIT

Parameters:

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

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

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

  • 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 – NIRSpec footprint regions. MSA 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