Point Spread Function (photometry.psf)

Point Spread Function (PSF).

Code author: Rasmus Handberg <rasmush@phys.au.dk>

class photometry.psf.PSF(sector, camera, ccd, stamp)[source]

Bases: object

Point Spread Function (PSF).

camera

TESS camera (1-4).

Type

int

ccd

TESS CCD (1-4).

Type

int

stamp

The pixel sub-stamp used to generate PSF.

Type

tuple

shape

Shape of pixel sub-stamp.

Type

tuple

PSFfile

Path to PSF file that was interpolated in.

Type

string

ref_column

Reference CCD column that PSF is calculated for.

Type

float

ref_row

Reference CCD row that PSF is calculated for.

Type

float

splineInterpolation

2D Interpolation to evaluate PSF on arbitrary position relative to center of PSF.

Type

scipy.interpolate.RectBivariateSpline

Code author: Rasmus Handberg <rasmush@phys.au.dk>

__init__(sector, camera, ccd, stamp)[source]

Point Spread Function (PSF).

Parameters
  • sector (int) – TESS Observation sector.

  • camera (int) – TESS camera number (1-4).

  • ccd (int) – TESS CCD number (1-4).

  • stamp (4-tuple) – Sub-stamp on CCD to load PSF for.

Code author: Rasmus Handberg <rasmush@phys.au.dk>

integrate_to_image(params, cutoff_radius=5)[source]

Integrate the underlying high-res PSF onto pixels.

Parameters
  • params (iterator, numpy.array) – List of stars to add to image. Should be an iterator where each element is an numpy array with three elements: row, column and flux.

  • cutoff_radius (float, optional) – Maximal radius away from center of star in pixels to integrate PSF model.

Returns

Image

Return type

numpy.array

plot()[source]

Create a plot of the shape of the PSF.