Detrend system

• Queuing
• Processing
• Stacking
• Normalization
• Residuals
• Rejection
• Registration

Detrend filenames

All detrends generated using the dettool/pantasks system are created with the following filename structure:

 WORKDIR/CAMERA.DET_TYPE.DET_ID/CAMERA.DET_TYPE.STAGE.DET_ID.ITERATION.CLASS_ID.fits

These components are as follows:

• WORKDIR : user specified (at time detRun queued) workdir
• CAMERA : camera for the detrend to be created (specified when queued)
• DET_TYPE : type of detrend generated (see below)
• DET_ID : database id for this detRun
• STAGE : generally "norm", as the normalized detrend is used in most cases.
• ITERATION : which rejection iteration this detrend is from.
• CLASS_ID : class_id that this detrend matches.

Detrend types

• DARK. Detrend to remove the camera dark current.
• DARKTEST. This is an intermediate testing version of a DARK. It is constructed based on the same recipes as a regular DARK, but will not be accidentally selected for processing when finished (as processing only selects a valid DARK detrend). However, as detrends are often constructed with this det_type (and then converted to a DARK, or registered as a DARK), filenames often contain this string.
• VIDEODARK. This is a special (currently theoretical) DARK that is constructed from frames that have had video data taken on a cell. This changes the electronic response of the detector, resulting in a different dark current on the images.
• FLAT. Detrend to remove the pixel-to-pixel response of the detector.
• FLATTEST. Similar to a DARKTEST above, this detrend is a FLAT that was constructed with a parallel name to avoid being accidentally used in processing.
• MASK. Manually constructed mask to remove bad areas of the detector.
• VIDEOMASK. Similar to a VIDEODARK above, but instead of correcting regions with discrepant dark current, these regions are masked out.
• CTEMASK. Automatically constructed mask that contains information about regions with Charge Transfer Efficiency issues.
• FRINGE. Detrend to remove fringing patterns in the infrared.
• LINEARITY. Manually constructed detrend listing the measured linearity response at low flux levels.
• NOISEMAP. Detrend containing the read noise values as a function of detector position. The regular noisemaps can be generated through the dettool system. We currently use boosted noisemaps that require subsequent processing to add these boosts.

Using detselect

-search

-select

Creation process

Current detrends