The vimos_ima_science recipe

vimos_ima_science

Synopsis

Science processing for imaging

Description

vimos_ima_science – VIMOS science recipe.

Take a list of science frames and correct them to remove bias, dark and flat field signatures. Optionally defringe the reddest filter images. Stack jitter sequences. Astrometrically and photometrically calibrate the stacks

The program accepts the following files in the SOF:

Tag Description OBJECT A list of raw science images MASTER_BIAS A master bias frame MASTER_DARK A master dark frame MASTER_TWILIGHT_FLAT A master flat frame MASTER_CONF A master confidence map MASTER_FRINGE A master fringe map (optional) MASTER_FRINGE_VAR A master fringe variance map (optional) MASTER_READGAIN A master readgain table MASTER_2MASS_CATALOGUE_ASTROM A master 2MASS index for astrometry or MASTER_PPMXL_CATALOGUE_ASTROM A master PPMXL index for astrometry or MASTER_APASS_CATALOGUE_ASTROM A master APASS index for astrometry or MASTER_LOCAL_CATALOGUE_ASTROM A master local index for astrometry MASTER_APASS_CATALOGUE_PHOTOM A master APASS index for photometry or MASTER_LOCAL_CATALOGUE_PHOTOM A master local index for photometry or OBJECT_CATALOGUE_STD A master processed standard star image or table MATCHSTD_PHOTOM A master photometric matched standards table (optional) SCHLEGEL_MAP_NORTH Northern Schlegel Map SCHLEGEL_MAP_SOUTH Southern Schlegel Map PHOTCAL_TAB A photometric calibration table

All of these are required unless specified otherwise.

Constructor

cpl.Recipe("vimos_ima_science")

Create an object for the recipe vimos_ima_science.

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

Parameters

vimos_ima_science.param.savecat

Save catalogue? (bool; default: False) [default=False].

vimos_ima_science.param.savemstd

Save matched standard catalogues? (bool; default: False) [default=False].

vimos_ima_science.param.preview_only

Preview only? (bool; default: False) [default=False].

vimos_ima_science.param.minphotom

Minimum stars for photometry solution (int; default: 1) [default=1].

vimos_ima_science.param.prettynames

Use pretty product names? (bool; default: False) [default=False].

vimos_ima_science.param.chop_crud

Chop crud method (str; default: ‘hardconf_pix’) [default=”hardconf_pix”].

vimos_ima_science.param.cdssearch_astrom

CDS astrometric catalogue (str; default: ‘none’) [default=”none”].

vimos_ima_science.param.cdssearch_photom

CDS photometric catalogue (str; default: ‘none’) [default=”none”].

vimos_ima_science.param.ignore_fringe

Ignore provided fringe frame? (bool; default: False) [default=False].

vimos_ima_science.param.stk_cat_ipix

Minimum pixel area for each detected object (int; default: 10) [default=10].

vimos_ima_science.param.stk_cat_thresh

Detection threshold in sigma above sky (float; default: 1.5) [default=1.5].

vimos_ima_science.param.stk_cat_icrowd

Use deblending? (bool; default: True) [default=True].

vimos_ima_science.param.stk_cat_rcore

Value of Rcore in pixels (float; default: 10.0) [default=10.0].

vimos_ima_science.param.stk_cat_nbsize

Background smoothing box size (int; default: 128) [default=128].

vimos_ima_science.param.stk_lthr

Low rejection threshold (float; default: 3.0) [default=3.0].

vimos_ima_science.param.stk_hthr

Upper rejection threshold (float; default: 3.0) [default=3.0].

vimos_ima_science.param.stk_method

Stacking method (str; default: ‘linear’) [default=”linear”].

vimos_ima_science.param.stk_seeing

Weight by seeing? (bool; default: False) [default=False].

vimos_ima_science.param.stk_fast

Stack using fast algorithm? (str; default: ‘auto’) [default=”auto”].

vimos_ima_science.param.stk_nfst

Nframes to stack in fast mode (int; default: 16) [default=16].

vimos_ima_science.param.cacheloc

Location for standard star cache (str; default: ‘.’) [default=”.”].

vimos_ima_science.param.magerrcut

Magnitude error cut (float; default: 100.0) [default=100.0].

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

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

vimos_ima_science.param.savecat = False
vimos_ima_science.param.savemstd = False
vimos_ima_science.param.preview_only = False
vimos_ima_science.param.minphotom = 1
vimos_ima_science.param.prettynames = False
vimos_ima_science.param.chop_crud = "hardconf_pix"
vimos_ima_science.param.cdssearch_astrom = "none"
vimos_ima_science.param.cdssearch_photom = "none"
vimos_ima_science.param.ignore_fringe = False
vimos_ima_science.param.stk_cat_ipix = 10
vimos_ima_science.param.stk_cat_thresh = 1.5
vimos_ima_science.param.stk_cat_icrowd = True
vimos_ima_science.param.stk_cat_rcore = 10.0
vimos_ima_science.param.stk_cat_nbsize = 128
vimos_ima_science.param.stk_lthr = 3.0
vimos_ima_science.param.stk_hthr = 3.0
vimos_ima_science.param.stk_method = "linear"
vimos_ima_science.param.stk_seeing = False
vimos_ima_science.param.stk_fast = "auto"
vimos_ima_science.param.stk_nfst = 16
vimos_ima_science.param.cacheloc = "."
vimos_ima_science.param.magerrcut = 100.0

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

import cpl
vimos_ima_science = cpl.Recipe("vimos_ima_science")
[...]
res = vimos_ima_science( ..., param = {"savecat":False, "savemstd":False})

See also

cpl.Recipe for more information about the recipe object.

Bug reports

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