pypeit.spectrographs.not_alfosc module

Module for NOT ALFOSC spectrograph

class pypeit.spectrographs.not_alfosc.NOTALFOSCSpectrograph

Bases: Spectrograph

Child to handle NOT ALFOSC spectrograph

camera = 'ALFOSC'

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.

• 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 = 'For use with the standard horizontal slits only. Grisms 3, 4, 5, 7, 8, 10, 11, 17, 18, 19, 20'

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

config_specific_par(scifile, inp_par=None)

Modify the PypeIt parameters to hard-wired values used for specific instrument configurations.

Parameters:

• scifile (str) – File to use when determining the configuration and how to adjust the input parameters.

• inp_par (ParSet, optional) – Parameter set used for the full run of PypeIt. If None, use default_pypeit_par().

Returns:

The PypeIt parameter set adjusted for configuration specific parameter values.

Return type:

ParSet

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.

Detector data from here.

Warning

Many of the necessary detector parameters are read from the file header, meaning the hdu argument is effectively required for NOT/ALFOSC. The optional use of hdu is only viable for automatically generated documentation.

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 = 'ALFOSC_FASU'

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 = 'not_alfosc'

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

ndet = 1

Number of detectors for this instrument.

raw_header_cards()

Return additional raw header cards to be propagated in downstream output files for configuration identification.

The list of raw data FITS keywords should be those used to populate the configuration_keys() or are used in config_specific_par() for a particular spectrograph, if different from the name of the PypeIt metadata keyword.

This list is used by subheader_for_spec() to include additional FITS keywords in downstream output files.

Returns:

List of keywords from the raw data files that should be propagated in output files.

Return type:

list

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          NOT                  KECK     str         False    longitude     -17.879999999999995  None     int, float  False    latitude      28.758333333333336   None     int, float  False    elevation     2326.999999998442    None     int, float  False    fratio        None                 None     int, float  False    diameter      2.56                 None     int, float  False    eff_aperture  None                 None     int, float  False   

Instance of TelescopePar providing telescope-specific metadata.

url = 'https://www.not.iac.es/instruments/alfosc/'

Reference url

class pypeit.spectrographs.not_alfosc.NOTALFOSCSpectrographVert

Bases: NOTALFOSCSpectrograph

Child to handle Vertical slits for NOT ALFOSC spectrograph

comment = 'Grisms 3, 4, 5, 7, 8, 10, 11, 17, 18, 19, 20. For vertical slits only'

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

get_detector_par(det, hdu=None)

Return metadata for the selected detector.

Detector data from here.

Warning

Many of the necessary detector parameters are read from the file header, meaning the hdu argument is effectively required for NOT/ALFOSC. The optional use of hdu is only viable for automatically generated documentation.

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

name = 'not_alfosc_vert'

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