TransformGrismconf

class grizli.grismconf.TransformGrismconf(conf_file='')

Bases: object

Transform GRISMCONF-format configuration files to grizli convention of wavelength increasing towards +x

See https://github.com/npirzkal/GRISMCONF and config files at, e.g., https://github.com/npirzkal/GRISM_NIRCAM.

Parameters

conf_filestr

Configuration filename

Attributes Summary

beams	aXe beam names like 'A','B','C', etc.
orders	GRISMCONF order names, like '+1', '0', '+2', etc.

Methods Summary

get_beam_trace([x, y, dx, beam, fwcpos])	Function analogous to grizli.grismconf.aXeConf.get_beam_trace but that accounts for the different dispersion axes of JWST grisms
get_beams([nt, min_sens])	Get beam parameters and read sensitivity curves
load_nircam_sensitivity_curve([verbose])	Replace +1 NIRCam sensitivity curves with Nov 10, 2023 updates
remove_beam(beam)	Remove a beam from the orders list

Attributes Documentation

beams

aXe beam names like ‘A’,’B’,’C’, etc.

orders

GRISMCONF order names, like ‘+1’, ‘0’, ‘+2’, etc.

Methods Documentation

get_beam_trace(x=1024, y=1024, dx=0.0, beam='A', fwcpos=None)

Function analogous to grizli.grismconf.aXeConf.get_beam_trace but that accounts for the different dispersion axes of JWST grisms

Parameters

x, yfloat

Reference position in the rotated frame

dxarray-like

Offset in pixels along the trace

beamstr

Grism order, translated from +1, 0, +2, +3, -1 = A, B, C, D, E

fwcposfloat

NIRISS rotation (not implemented)

Returns

dyfloat or array-like

Center of the trace in y pixels offset from (x,y) evaluated at dx.

lamfloat or array-like

Effective wavelength along the trace evaluated at dx.

get_beams(nt=512, min_sens=0.001)

Get beam parameters and read sensitivity curves

Parameters

ntint

Number of points to sample the GRISMCONF t parameter

min_sensfloat

Minimum sensitivity to consider in the sensitivity curves.

Returns

sets dxlam, nx, sens, attributes

load_nircam_sensitivity_curve(verbose=True, **kwargs)

Replace +1 NIRCam sensitivity curves with Nov 10, 2023 updates

Files generated with the calibration data of P330E from program CAL-1538 (K. Gordon)

Download the FITS files from the link below and put them in $GRIZLI/CONF/GRISM_NIRCAM/.

https://s3.amazonaws.com/grizli-v2/JWSTGrism/NircamSensitivity/index.html

Parameters

verbosebool

Print messages to the terminal.

remove_beam(beam)

Remove a beam from the orders list

Parameters

beamstr

Beam name, like ‘A’, ‘B’, ‘C’, etc.

Returns

removedbool

True if the beam was removed, False if it was not in the list.