[ ESO ]
SINFONI:
calibration data

CAL | HC | refs | QC
QUALITY CONTROL
    HOME
SINFONI QC
Trending & QC1
Pipeline
calibration data
Data Packages
Data Management
QC links:
general SINFONI

CALIBRATION DATA: GENERAL

Calibration data are taken for two purposes:

  • to calibrate SCIENCE data
  • to measure and control the instrumental status

Generally SINFONI calibration data are taken as daytime calibrations. Telluric standard stars and Point Spread Function calibration stars (PSF-stars) are generally observed during the night, as described by the calibration plan (see the SINFONI User's Manual for details). If explicitly requested by the user, night time calibrations may also be obtained as part of the Observing Block (OB) which generates the science data (so-called "attached calibrations").

All calibration data taken in SINFONI are processed by QC Garching to obtain calibration solutions. These solutions come as

  • calibration product fits file frames (for example, master darks or master lamp flat frames)
  • calibration product fits tables (for example, slitlet position tables, distortion correction tables, wavelength solution tables, etc.)

 

TYPES OF RAW CALIBRATION DATA

The following types of raw calibration data exist for the SINFONI IFU mode

frame DPR TYPE Purpose
typical number taken per night and setting
DARK DARK detector status, dark level, RON, hot (high dark current) pixels
3
LAMP FLAT FLAT,LAMP fixed pattern noise, vignetting, bad pixels 10
WAVE WAVE,LAMP wavelength calibration, position of slitlets
2
DISTORTION DISTORTION,FIBRE,NS DISTORTION,WAVE,NS DISTORTION,FLAT,NS optical distortion, distances between successive slitlets

75
2
2

LINEARITY

LAMP,LINEARITY

Linearity, bad (non-linear) pixels, fixed pattern noise 10
STANDARD STAR STD and SKY,STD standard stars for telluric features 2
PSF PSF-CALIBRATOR and
SKY,PSF-CALIBRATOR
PSF, Strehl ratio 2

 

CALIBRATION PRODUCTS

Complete overview of calibration files and recipes

 

raw frame(s) template/recipe description
products, PRO.CATG

DARK

SINFONI_ifu_cal_Dark
sinfo_rec_mdark

create a master dark from set of input raw frames and calculates the RON, generate a hot pixel map.

MASTER_DARK
BP_MAP_HP

FLAT LAMP SINFONI_ifu_cal_mflat
sinfo_rec_mflat
 
Create a master lamp flat and a bad (large deviating) pixel map BP_MAP_NO. Combine with BP_MAP_DI to generate a MASTER bad pixel map.

MASTER_LAMP_FLAT
BP_MAP_NO
MASTER_BP_MAP

WAVE LAMP

SINFONI_ifu_cal_Arcs
sinfo_rec_wavecal

define high accuracy detector response distribution, only SW

WAVE_MAP
SLIT_POS

LINEARITY SINFONI_ifu_cal_Detlin
sinfo_rec_detlin
 
Fit each pixel by a nth-order polynomial (n=2) and save coefficients in COEFFS_CUBE. Combine outliers map with REF_PIXEL_MAP in BP_MAP_DI.
BP_MAP_DI
COEFFS_CUBE
DISTORTION

SINFONI_ifu_cal_NStest
sinfo_rec_distortion

Derive optical distortion coefficients and distances of consecutive slits.
DISTORTION
SLITLET_DISTANCES
STD

SINFONI_ifu_cal_STD
sinfo_rec_jitter

Cube reconstructed and sky-subtracted Telluric Standard star. Extract spectrum, determine instrumental efficiency and response
COADD_STD
SPECTRA
PSF

SINFONI_ifu_cal_PSF
sinfo_rec_jitter

Collapse PSF reconstructed cube , determine Strehl ratio and obtain the encircled energy MASTER_PSF
AO_PERFORMANCE

 

Naming scheme

After production and certification, the calibration products are renamed with a more user-friendly scheme which includes type, creation date and relevant setting parameters.

Description of naming scheme



CALIBRATION CASCADE

The calibration of SINFONI science frames requires a cascading scheme where the mutual dependencies of products and raw frames have to be respected. Some products (dark, distortion) can be produced from raw files only, but most products require the prior generation of other calibration products. The proper sequence of all these production steps is called the calibration cascade. It is described here.

Within that cascade, all products are checked with respect to their quality and their relationship in time. This means e.g. that a master flat is not only generated using an arbitrary quality-checked order table, but that specific table is chosen which at the moment of processing is closest in time.

All products created by QC Garching follow the calibration cascade.


STATIC CALIBRATION TABLES

The following static (i.e. the ones not being regularly processed from raw calibration data) calibration images and tables are required for SINFONI data processing:

 

CODE TYPE OF FILE PRO_CATG EXAMPLE
GARC

arc line reference table (J, H, H+K, K bands)

REF_LINE_ARC

SI_GARC_050331A_H+K.fits

GBPM reference bad pixel map (image) REF_BP_MAP SI_GBPM_050331A_REF_BP_MAP.fits
GCOL position of first slitlet column (table) FIRST_COL SI_GCOL_050331A_FIRST_COL.fits
GDRS first guess wavelength dispersion solution table DRS_SETUP_WAVE SI_GDRS_050331A_DRS_SETUP_WAVE.fits
GATM atmospheric dispersion correction table ATM_REF_CORR SI_GATM_REF_CORR_J_025.fits *

*Note: The atmospheric dispersion correction tables exist for all grisms (S1_J, S2_H, S3_K, and S4_H+K) and for the 25 and 100 mas pixel scales.
The 250 mas pixel is not corrected, since at this pixel scale the maximal shift due to atmospheric dispersion is less than one pixel. The correction of
data cubes for atmospheric dispersion is implemented in SINFONI pipeline versions after 2.0.9.

They are included in the Service Mode delivery for SINFONI data.

ACTUAL PROBLEMS AND ISSUES


SINFONI pipeline problems and instrument issues are documented in the ServiceMode page.

 


 
[ESO][Index][Search][Help][News]