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SINFONI Science files and recipes

 

SINFONI SCIENCE data have been processed by the pipeline with the best available calibration data. Please note that ESO is not assuming any responsibility in respect to the usefulness of the reduced data. The adopted reduction strategy may not be suitable for the scientific purpose of the observations.

 

 

Notes. The SINFONI science recipe sinfo_rec_jitter provides several ways to subtract the sky spectrum and to coadd individual cubes (PRO.CATG = OBS_OBJ) to a coadded cube (PRO.CATG = COADD_OBJ). The strategy does not depend on the used template but on the number of raw SCIENCE input frames and the number of frames with DPR.TYPE = SKY_NODDING.

pipeline version 1.0.6:

In case the science raw file stack contains SKY frames, the closest in times observed SKY frame is extracted from each DPR.TYPE = OBJECT frame. The SKY subtracted OBJECT frames are coadded, according to the information given in the CUMOFFSET fits header keys. The offsets in pixel units are PixelX = -2 * CUMOFFSETX; PixelY = 2 * CUMOFFSETY (this convention may change from Oct 1, P76 on).

In case the science raw file stack does not contain any SKY frames, several strategies are provided

  1. MEDIAN_STACKING: The parameter sinfo.objnod.autojitter_method=2 in the configuration file sinfo_rec_jitter. The median of each pixel is considered to be SKY and is subtracted from each OBS_OBJ frame.
    The following example of four OBS_OBJ cubes (here the median collapsed in z is shown with 99%-cuts)
    frame 1 minus frame 2frame 2 minus frame 1
    frame 3 minus frame 2 frame 4 minus frame 3

    The final coadded product (again median collapsed) looks like this:

    The first sky subtracted cube appears in the center of the final COADD_OBJ cube. The three other cubes are coadded accordingly.

  2. SKY_IS_NEXT: The parameter sinfo.objnod.autojitter_method=1 in the configuration file sinfo_rec_jitter. Pairs of consecutive OBS_OBJ frames are generated, of which one is subtracted from the other as sky. Sources in the subtracted frame appear as sources with negative flux in the final COADD_OBJ product.
    The following example of four OBS_OBJ cubes (here the median collapsed in z is shown with 99%-cuts)
    frame 1 minus frame 2frame 2 minus frame 1
    frame 3 minus frame 2 frame 4 minus frame 3
    The left negative source is twice as strong, since it is frame 3 (subtracted from frame 4) and frame 2 (subtracted from frame 1). The closest in time frame of the stack is used as sky to be subtrcated. It can be the previous or the next frame of the science stack.
    The final coadded product (again median collapsed) looks like this:


  3. The sinfo.objnod.autojitter_method=0 in the configuration file sinfo_rec_jitter. No sky is subtracted.

 

pipeline version 1.0.7 (used for date from ~2005-06-XX on), as for 1.0.6, SKY frames are subtracted, in case they are part of the raw frame stack. If there is no SKY frame given, then:

  1. sinfo.objnod.autojitter_method=0 in the configuration file sinfo_rec_jitter : No sky subtraction. This method is also applied in case a single OBJECT raw frame is submitted (no SKY).
  2. sinfo.objnod.autojitter_method=1 in the configuration file sinfo_rec_jitter :
    use SKY_IS_NEXT method
    subtract the dummy sky from the OBJECT
    each processed OBJECT frame is cube reconstructed (PRO.CATG = OBS_OBJ):

    jitter_int = 1 : coadded cube is generated
    scales_sky = TRUE : spatial median subtracted from each plane of the reconstructed cube to take out temporal residuals of the sky
    ks_clip = TRUE : kappa-sigma clipping applied to each pixel after cube aligning (= in the set of co-aligned OBJECT frames), to mask cosmics and hot pixels.
  3. sinfo.objnod.autojitter_method=2 in the configuration file sinfo_rec_jitter: SKY_IS_NEXT method
  4. sinfo.objnod.autojitter_method=3 in the configuration file sinfo_rec_jitter: MEDIAN_STACKING method

Defaults: sinfo.objnod.autojitter_method=1 scales_sky = FALSE , ks_clip = FALSE, jitter_int = 1

Science products of service mode packages use :

In case science stacks contain embeded SKY frames, it is assumed there are reasons for that observing strategy (e.g. filamenteous background). In this case the SKY frames itself are used to correct OBJECT frames.

pipeline version 1.0.9 (used for date from ~2005-07-06 on)

  1. sinfo.objnod.autojitter_method=0 in the configuration file sinfo_rec_jitter : No sky subtraction. This method is also applied in case a single OBJECT raw frame is submitted (no SKY).
  2. sinfo.objnod.autojitter_method=1 in the configuration file sinfo_rec_jitter :
    use SKY_IS_NEXT method
    subtract the dummy sky from the OBJECT
  3. sinfo.objnod.autojitter_method=2 in the configuration file sinfo_rec_jitter: MEDIAN_STACKING method

Defaults: sinfo.objnod.autojitter_method=1 scales_sky = FALSE , ks_clip = FALSE, jitter_int = 1

Science products of service mode packages use :

Input

TPL.ID (one of) SINFONI_ifu_obs_AutoJitterOffset
TPL.IDSINFONI_ifu_obs_FixedSkyOffset
TPL.IDSINFONI_ifu_obs_GenericOffset
TPL.IDSINFINI_ifu_obs_AutoJitter
DPR.TYPE OBJECT
DPR.TYPE SKY (optional, but never for AutoJitter)
TAGOBJECT_NODDING
TAGSKY_NODDING (optional, but never for AutoJitter)
required master calibrationsMASTER_FLAT_LAMP (from mflat)
required master calibrationsMASTER_BP_MAP (from mflat )
required master calibrationsWAVE_MAP (from wavecal)
required master calibrationsDISTORTION (from distortion)
required master calibrationsSLITLES_DISTANCE (from distortion)
required master calibrations 
required master calibrations 
groupingINS.SETUP.ID = S1_J, S2_H, S3_K, S4_H+K
groupingINS.OPTI1.NAME = 0.025, 0.1, 0.25
groupingOBS.ID, OBS.PROG.ID
recipe/callesorex sinfo_rec_jitter sof
recipe configuration file sinfo_rec_jitter.rc

Products.

PRO.CATGcontents
COADD_OBJcoadded cube
MASK_COADD_OBJ Integer cube mask, showing the weighting factors in units of integration tine in seconds.
OBJECT_NODDING_ STACKED sky-subtrcated and distortion corrected intermediate products, not wavelength calibrated, not cube reconstructed. There are several instances of this intermediate product.
OBS_OBJ as OBJECT_NODDING_STACKED, but cube reconstructed, not coadded. Scaling of SKY and kappa-sigma clipping not yet applied; is part of the co-adding. There are several instances of this intermediate product.
SKY_MED (to be verified) median collapsed SKY cube intermediate product
SKY_STACJKED_DUMMY constructed sky frame. In case of method MEDIAN_STACKING, the first instance is the second OBJECT frame. There are several instances of this intermediate product.
MED_COADD_OBJ median collapsed COADD_OBJ

QC parameters

  

 



Send comments to <Mark.Neeser@eso.org> 
Last update: Aug 24, 2005 
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