pypeit.spectrographs.mdm_modspec module

Module for MDM/Modspec specific methods.

class pypeit.spectrographs.mdm_modspec.MDMModspecEchelleSpectrograph

Bases: Spectrograph

Child to handle MDM Modspec Echelle instrument+detector

camera = 'Echelle'

Name of the spectrograph camera or arm. This is used by specdb, so use that naming convention

check_frame_type(ftype, fitstbl, exprng=None)

Check for frames of the provided type.

Parameters:

• ftype (str) – Type of frame to check. Must be a valid frame type; see frame-type Definitions.

• fitstbl (astropy.table.Table) – The table with the metadata for one or more frames to check. This table uses the Pypeit-specific metadata keywords, as defined under def init_meta(self).

• exprng (list, optional) – Range in the allowed exposure time for a frame of type ftype. See pypeit.core.framematch.check_frame_exptime().

Returns:

Boolean array with the flags selecting the exposures in fitstbl that are ftype type frames.

Return type:

numpy.ndarray

comment = 'MDM Modspec spectrometer; Only 1200l/mm disperser (so far)'

A brief comment or description regarding PypeIt usage with this spectrograph.

compound_meta(headarr, meta_key)

Methods to generate metadata requiring interpretation of the header data, instead of simply reading the value of a header card.

Parameters:

• headarr (list) – List of astropy.io.fits.Header objects.

• meta_key (str) – Metadata keyword to construct.

Returns:

Metadata value read from the header(s).

Return type:

object

configuration_keys()

Return the metadata keys that define a unique instrument configuration.

This list is used by PypeItMetaData to identify the unique configurations among the list of frames read for a given reduction.

Returns:

List of keywords of data pulled from file headers and used to constuct the PypeItMetaData object.

Return type:

list

classmethod default_pypeit_par()

Return the default parameters to use for this instrument.

Returns:

Parameters required by all of PypeIt methods.

Return type:

PypeItPar

get_detector_par(det, hdu=None)

Return metadata for the selected detector.

Parameters:

• det (int) – 1-indexed detector number.

• hdu (astropy.io.fits.HDUList, optional) – The open fits file with the raw image of interest. If not provided, frame-dependent parameters are set to a default.

Returns:

Object with the detector metadata.

Return type:

DetectorContainer

header_name = 'Modspec'

Name of the spectrograph camera or arm from the Header. Usually the INSTRUME card.

init_meta()

Define how metadata are derived from the spectrograph files.

That is, this associates the PypeIt-specific metadata keywords with the instrument-specific header cards using meta.

name = 'mdm_modspec'

The name of the spectrograph. See Spectrographs for the currently supported spectrographs.

ndet = 1

Number of detectors for this instrument.

pypeit_file_keys()

Define the list of keys to be output into a standard PypeIt file.

Returns:

The list of keywords in the relevant PypeItMetaData instance to print to the PypeIt Reduction File.

Return type:

list

pypeline = 'MultiSlit'

String used to select the general pipeline approach for this spectrograph.

supported = True

Flag that PypeIt code base has been sufficiently tested with data from this spectrograph that it is officially supported by the development team.

telescope = Parameter     Value                Default  Type        Callable ---------------------------------------------------------------- name          HILTNER              KECK     str         False    longitude     -111.61666666666667  None     int, float  False    latitude      31.949999999999992   None     int, float  False    elevation     1938.0000000001721   None     int, float  False    fratio        None                 None     int, float  False    diameter      2.4                  None     int, float  False    eff_aperture  None                 None     int, float  False   

Instance of TelescopePar providing telescope-specific metadata.