The visir_img_dark recipe

visir_img_dark

Synopsis

Dark recipe

Description

This recipe computes the dark.

The files listed in the Set Of Frames (sof-file) must be tagged either VISIR-dark-image-raw-file.fits IM_CAL_DARK or VISIR-dark-spectro-raw-file.fits SPEC_CAL_DARK

The corresponding four products will each have a FITS card ‘HIERARCH ESO PRO CATG’ with values (for imaging) IMG_DARK_AVG IMG_DARK_HOT IMG_DARK_COLD IMG_DARK_DEV

or (for spectroscopy)

SPEC_DARK_AVG SPEC_DARK_HOT SPEC_DARK_COLD SPEC_DARK_DEV

Constructor

cpl.Recipe("visir_img_dark")

Create an object for the recipe visir_img_dark.

import cpl
visir_img_dark = cpl.Recipe("visir_img_dark")

Parameters

visir_img_dark.param.r

Rejected left right bottom and top border (pixel) (str; default: ‘50 50 50 50’) [default=”50 50 50 50”].

visir_img_dark.param.hot_t

Hot pixel map threshold (float; default: 10.0) [default=10.0].

visir_img_dark.param.cold_t

Cold pixel map threshold (float; default: 6.0) [default=6.0].

visir_img_dark.param.dev_t

Deviant pixel map threshold (float; default: 5.0) [default=5.0].

visir_img_dark.param.nsamples

Number of samples for Read-Out Noise (RON) computation (long; default: 100) [default=100].

visir_img_dark.param.hsize

Half size of the window for Read-Out Noise (RON) computation (long; default: 2) [default=2].

The following code snippet shows the default settings for the available parameters.

import cpl
visir_img_dark = cpl.Recipe("visir_img_dark")

visir_img_dark.param.r = "50 50 50 50"
visir_img_dark.param.hot_t = 10.0
visir_img_dark.param.cold_t = 6.0
visir_img_dark.param.dev_t = 5.0
visir_img_dark.param.nsamples = 100
visir_img_dark.param.hsize = 2

You may also set or overwrite some or all parameters by the recipe parameter param, as shown in the following example:

import cpl
visir_img_dark = cpl.Recipe("visir_img_dark")
[...]
res = visir_img_dark( ..., param = {"r":"50 50 50 50", "hot_t":10.0})

See also

cpl.Recipe for more information about the recipe object.

Bug reports

Please report any problems to Lars Lundin. Alternatively, you may send a report to the ESO User Support Department.