The xsh_scired_ifu_offset recipe

xsh_scired_ifu_offset

Synopsis

Reduce science IFU on-off exposures and build a 3D cube

Description

This recipe Reduce science IFU on-off exposures and build a 3D cube Input Frames :

  • A set of 2xn Science frames, Tag = OBJECT_IFU_OFFSET_arm, SKY_IFU_arm

  • A spectral format table (Tag = SPECTRAL_FORMAT_TAB_arm)

  • A master flat frame (Tag = MASTER_FLAT_IFU_arm)

  • An order table frame(Tag = ORDER_TABLE_EDGES_IFU_arm)

  • 3 wave solution frames, one per slitlet (Tag = WAVE_TAB_ARC_IFU_slitlet_arm)

    where ‘slitlet’ is DOWN, CEN or UP

  • [OPTIONAL] A dispersion table (Tag = DISP_TAB_IFU_arm)

  • [OPTIONAL] A non-linear badpixel map (Tag = BP_MAP_NL_arm)

  • [OPTIONAL] A reference badpixel map (Tag = BP_MAP_RP_arm)

Products :

  • Merged 3D data cube (PREFIX_MERGE3D_DATA_OBJ_arm)

  • QC Traces of 3D data cube (PREFIX_MERGE3D_TRACE_OBJ_arm)

  • Order by order 3D data cube (PREFIX_ORDER3D_DATA_OBJ_arm)

  • Order by order 3D qual cube (IFU_CFG_COR_arm)

  • Order by order 3D qual cube (PREFIX_MERGE3D_DATA_SKY_arm)

  • where PREFIX is SCI, FLUX, TELL if input raw DPR.TYPE contains OBJECT or FLUX or TELLURIC

  • 1 Spectrum merge 3D, PRO.CATG=MERGE3D_IFU_arm

Constructor

cpl.Recipe("xsh_scired_ifu_offset")

Create an object for the recipe xsh_scired_ifu_offset.

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

Parameters

xsh_scired_ifu_offset.param.keep_temp

If ‘no’, temporary files are deleted. (str; default: ‘no’) [default=”no”].

xsh_scired_ifu_offset.param.debug_level

Additional xshooter debug level. One of ‘none’, ‘low’, ‘medium’, ‘high’ (str; default: ‘none’) [default=”none”].

xsh_scired_ifu_offset.param.time_stamp

Add timestamp to product file name. (bool; default: False) [default=False].

xsh_scired_ifu_offset.param.decode_bp

Integer representation of the bits to be considered bad when decoding the bad pixel mask pixel values. Most frequent codes relevant for the user: 0: good pixel, 8: pick-up noise, 16: cosmic-ray removed, 32: cosmic-ray unremoved, 128: calibration file defect, 256: hot pixel, 512: dark pixel, 4096: A/D converted saturation, 32768: non linear pixel, 1048576: extrapolated flux in NIR, 4194304: Interpolated flux during extraction. (int; default: 2144337919) [default=2144337919].

xsh_scired_ifu_offset.param.pre_overscan_corr

pre-overscan correction. 0: no correction 1: mean overscan correction 2: mean prescan correction 3: (mean pre+mean overscan)/2 correction (int; default: 1) [default=1].

xsh_scired_ifu_offset.param.stack_method

Method used to build master frame. (str; default: ‘median’) [default=”median”].

xsh_scired_ifu_offset.param.klow

Kappa used to clip low level values, when method is set to ‘mean’ (float; default: 5.0) [default=5.0].

xsh_scired_ifu_offset.param.khigh

Kappa used to clip high level values, when method is set to ‘mean’ (float; default: 5.0) [default=5.0].

xsh_scired_ifu_offset.param.crh_clip_kappa

Kappa value in sigma clipping during CRH rejection using multiple frames (float; default: 5.0) [default=5.0].

xsh_scired_ifu_offset.param.crh_clip_niter

Number of iterations in sigma clipping during CRH rejection using multiple frames (int; default: 5) [default=5].

xsh_scired_ifu_offset.param.crh_clip_frac

Minimal ratio of points accepted / total in sigma clipping during CRH rejection using multiple frames (float; default: 0.7) [default=0.7].

xsh_scired_ifu_offset.param.removecrhsingle_sigmalim

Poisson fluctuation threshold to flag CRHs (see van Dokkum, PASP,113,2001,p1420-27) (float; default: 5.0) [default=5.0].

xsh_scired_ifu_offset.param.removecrhsingle_flim

Minimum contrast between the Laplacian image and the fine structure image that a point must have to be flagged as CRH. (see van Dokkum, PASP,113,2001,p1420-27) (float; default: 2.0) [default=2.0].

xsh_scired_ifu_offset.param.removecrhsingle_niter

Max number of iterations (int; default: 4) [default=4].

xsh_scired_ifu_offset.param.rectify_kernel

Name of the Interpolation Kernel Used. Possible values are: tanh, sinc, sinc2, lanczos, hamming, hann. (str; default: ‘tanh’) [default=”tanh”].

xsh_scired_ifu_offset.param.rectify_radius

Rectify Interpolation radius [bin units]. (float; default: 2.0) [default=2.0].

xsh_scired_ifu_offset.param.rectify_bin_lambda

Wavelength step in the output spectrum [nm] (float; default: -1.0) [default=-1.0].

xsh_scired_ifu_offset.param.rectify_bin_slit

Spatial step along the slit in the output spectrum [arcsec] (float; default: -1.0) [default=-1.0].

xsh_scired_ifu_offset.param.localize_method

Localization method (MANUAL, MAXIMUM, GAUSSIAN) used to detect the object centroid and height on the slit (str; default: ‘MANUAL’) [default=”MANUAL”].

xsh_scired_ifu_offset.param.localize_chunk_nb

Number of chunks in the full spectrum to localize the object (int; default: 10) [default=10].

xsh_scired_ifu_offset.param.localize_thresh

Threshold relative to the peak intensity below which the edges of the object are detected for MAXIMUM localization (float; default: 0.1) [default=0.1].

xsh_scired_ifu_offset.param.localize_deg_lambda

Degree in lambda in the localization polynomial expression slit=f(lambda), used only for MAXIMUM and GAUSSIAN (int; default: 0) [default=0].

xsh_scired_ifu_offset.param.localize_slit_position

Object position on the slit for MANUAL localization [arcsec] (float; default: 0.0) [default=0.0].

xsh_scired_ifu_offset.param.localize_slit_hheight

Object half height on the slit for MANUAL localization [arcsec] (float; default: 2.0) [default=2.0].

xsh_scired_ifu_offset.param.localize_kappa

Kappa value for sigma clipping in the localization polynomial fit (float; default: 3.0) [default=3.0].

xsh_scired_ifu_offset.param.localize_niter

Number of iterations for sigma clipping in the localization polynomial fit (int; default: 3) [default=3].

xsh_scired_ifu_offset.param.localize_use_skymask

TRUE if we want to mask sky lines using SKY_LINE_LIST file. (bool; default: False) [default=False].

xsh_scired_ifu_offset.param.compute_map

if TRUE recompute (wave and slit) maps from the dispersion solution. If sky-subtract is set to TRUE this must be set to TRUE. (bool; default: False) [default=False].

xsh_scired_ifu_offset.param.trace_obj

if TRUE trace object position on each IFU slice. In this case order TAB edges is required (bool; default: False) [default=False].

xsh_scired_ifu_offset.param.check_afc

Input AFC corrected model/wave solution and science frame check. If TRUE the recipe verify that the input mode/wave solution is AFC corrected, its INS.OPTIi.NAME is ‘Pin_0.5 ‘, and its OBS.ID and OBS.TARG.NAME values matches with the corresponding values of the science frame. (bool; default: True) [default=True].

xsh_scired_ifu_offset.param.cut_uvb_spectrum

TRUE if recipe cuts the UVB spectrum at 556 nm (dichroich) (bool; default: True) [default=True].

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

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

xsh_scired_ifu_offset.param.keep_temp = "no"
xsh_scired_ifu_offset.param.debug_level = "none"
xsh_scired_ifu_offset.param.time_stamp = False
xsh_scired_ifu_offset.param.decode_bp = 2144337919
xsh_scired_ifu_offset.param.pre_overscan_corr = 1
xsh_scired_ifu_offset.param.stack_method = "median"
xsh_scired_ifu_offset.param.klow = 5.0
xsh_scired_ifu_offset.param.khigh = 5.0
xsh_scired_ifu_offset.param.crh_clip_kappa = 5.0
xsh_scired_ifu_offset.param.crh_clip_niter = 5
xsh_scired_ifu_offset.param.crh_clip_frac = 0.7
xsh_scired_ifu_offset.param.removecrhsingle_sigmalim = 5.0
xsh_scired_ifu_offset.param.removecrhsingle_flim = 2.0
xsh_scired_ifu_offset.param.removecrhsingle_niter = 4
xsh_scired_ifu_offset.param.rectify_kernel = "tanh"
xsh_scired_ifu_offset.param.rectify_radius = 2.0
xsh_scired_ifu_offset.param.rectify_bin_lambda = -1.0
xsh_scired_ifu_offset.param.rectify_bin_slit = -1.0
xsh_scired_ifu_offset.param.localize_method = "MANUAL"
xsh_scired_ifu_offset.param.localize_chunk_nb = 10
xsh_scired_ifu_offset.param.localize_thresh = 0.1
xsh_scired_ifu_offset.param.localize_deg_lambda = 0
xsh_scired_ifu_offset.param.localize_slit_position = 0.0
xsh_scired_ifu_offset.param.localize_slit_hheight = 2.0
xsh_scired_ifu_offset.param.localize_kappa = 3.0
xsh_scired_ifu_offset.param.localize_niter = 3
xsh_scired_ifu_offset.param.localize_use_skymask = False
xsh_scired_ifu_offset.param.compute_map = False
xsh_scired_ifu_offset.param.trace_obj = False
xsh_scired_ifu_offset.param.check_afc = True
xsh_scired_ifu_offset.param.cut_uvb_spectrum = True

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

import cpl
xsh_scired_ifu_offset = cpl.Recipe("xsh_scired_ifu_offset")
[...]
res = xsh_scired_ifu_offset( ..., param = {"keep_temp":"no", "debug_level":"none"})

See also

cpl.Recipe for more information about the recipe object.

Bug reports

Please report any problems to A.Modigliani, J.Vernet, P. Bristow. Alternatively, you may send a report to the ESO User Support Department.