OrderStack
Overview
For Echelle spectrograph reductions, in addition to the OneSpec, the PypeIt spectrum output will include the coadded orders for each echelle setup used per spectrum per source, fully calibrated but not yet telluric corrected.
The standard way to generate this file is with the pypeit_coadd_1dspec script script.
The naming of this file is user-generated, i.e. it can be anything you wish, and for coadds with multiple setups the setup labels will be indicated with the tag like “_orderstacksA” (for setup “A”).
The header of the primary extension includes the core_meta of PypeIt, e.g. RA, DEC, MJD, and configuration parameters of the instrument.
Inspection
The file will need to be inspected manually by extracting the data from the .fits file.
Current Data Model
Internally, the spectrum for a single object is held by the
OrderStack class.
Here is its datamodel, which is written as an astropy.io.fits.BinTableHDU in the first HDU of the file.
Version 1.0.2
HDU Name |
HDU Type |
Data Type |
Description |
|---|---|---|---|
|
… |
Empty data HDU. Contains basic header information. |
|
|
… |
Single setup order stack data; see |
All wavelengths are in vacuum and flux units depend on whether Fluxing was performed.