triofactor.blogg.se - Signal path reset for recalibration

Signal path reset for recalibration series#

Spectral extractions will be made with heights less than the default size to isolate targets with small separations along the slit, or individual rows in a rectified spectral image of an extended target will be analyzed.The _flt images must be aligned before they can be combined with ocrreject. These exposures are not associated and are thus not combined in pipeline processing.

Signal path reset for recalibration series#

Integer pixel dithers were performed along the slit to move hot pixels in a series of CCD spectroscopic exposures.

The best target and background extraction regions for extracting 1-D spectra can depend on the science goals of the program. For example, you may wish to re-perform the cosmic ray rejection or the 1-D spectral extraction after adjusting the input parameters.

Some steps need to be repeated with different input parameters.

Contemporaneous CCD flat fields were obtained with the science data for G750L or G750M NIR observations to remove fringing.

Further refinement of the dark files can be achieved by using daily dark exposures. CCD darks and biases are examples of reference files that are updated frequently, but they require some time to be installed in the pipeline.

More appropriate reference files have become available since the data were taken.There are a number of reasons why it may be desirable to recalibrate your data. Sometimes the default pipeline calibration, performed shortly after the data were obtained from the telescope, is not the best possible calibration for your science program.