q3dfit

q3dfit is custom software for scientific analysis of integral field unit (IFU) spectroscopy of quasars and their host galaxies, specifically aimed at producing science-ready measurements from James Webb Space Telescope (JWST) IFU spectrographs. q3dfit takes advantage of the spectral differences between quasars and their host galaxies for maximal-contrast subtraction of the quasar point-spread function (PSF) to reveal and characterize the faint extended emission of the host galaxy. Host galaxy emission is carefully fit with a combination of stellar continuum, emission and absorption of dust and ices, and ionic and molecular emission lines.

Q3D logo

q3dfit originated with the JWST Early Release Science program Imaging Spectroscopy of Quasar Hosts with JWST analyzed with a powerful new PSF Decomposition and Spectral Analysis Package, or Q3D. Q3D targeted three quasars at redshifts 0.435, 1.593, 2.949 with both NIRSpec and MIRI-MRS.

Descriptions of the use of q3dfit can be found in the Q3D papers:

The developers of q3dfit are: * David Rupke (Rhodes College, software lead) * Dominika Wylezalek (University of Heidelberg, PI) * Nadia Zakamska (Johns Hopkins University, CoPI) * Sylvain Veilleux (University of Maryland College Park, CoPI) * Andrey Vayner (Johns Hopkins University, primary developer) * Caroline Bertemes (Heidelberg, primary developer) * Yuzo Ishikawa (Johns Hopkins University, primary developer) * Weizhe Liu (University of Maryland College Park, primary developer) * Carlos Anicetti (Johns Hopkins University, contributor) * Grace Lim (Rhodes College, contributor) * Ryan McCrory (Rhodes College, contributor) * Anna Murphree (Rhodes College and University of Hawai’i, contributor) * Lillian Whitesell (Rhodes College, contributor)

Note

Please use q3dfit and let us know if you find a bug or have a feature request. To do so, submit an issue on GitHub.

The q3dfit paper is in preparation. In the meantime, please cite Rupke et al. 2023:

@software{2023ascl.soft10004R,
author = {{Rupke}, David and {Wylezalek}, Dominika and {Zakamska}, Nadia and {Veilleux}, Sylvain and {Vayner}, Andrey and {Bertemes}, Caroline and {Ishikawa}, Yuzo and {Liu}, Weizhe and {Lim}, Hui Xian Grace and {Murphree}, Grey and {Whitesell}, Lillian and {McCrory}, Ryan and {Anicetti}, Carlos},
title = "{q3dfit: PSF decomposition and spectral analysis for JWST-IFU spectroscopy}",
howpublished = {Astrophysics Source Code Library, record ascl:2310.004},
year = 2023,
month = oct,
eid = {ascl:2310.004},
adsurl = {https://ui.adsabs.harvard.edu/abs/2023ascl.soft10004R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

You may also wish to cite the IDL-based direct ancestors of q3dfit:

@MISC{2014ascl.soft09005R,
author = {{Rupke}, David S.~N.},
title = "{IFSFIT: Spectral Fitting for Integral Field Spectrographs}",
keywords = {Software},
year = 2014,
month = sep,
eid = {ascl:1409.005},
pages = {ascl:1409.005},
archivePrefix = {ascl},
eprint = {1409.005},
adsurl = {https://ui.adsabs.harvard.edu/abs/2014ascl.soft09005R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@MISC{2021ascl.soft12002R,
author = {{Rupke}, D.~S.~N. and {Schweitzer}, M. and {Viola}, V. and {Lutz}, D. and {Sturm}, E. and {Spoon}, H. and {Veilleux}, S. and {Kim}, D. -C.},
title = "{QUESTFIT: Fitter for mid-infrared galaxy spectra}",
keywords = {Software},
year = 2021,
month = dec,
eid = {ascl:2112.002},
pages = {ascl:2112.002},
archivePrefix = {ascl},
eprint = {2112.002},
adsurl = {https://ui.adsabs.harvard.edu/abs/2021ascl.soft12002R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

We acknowledge funding provided by NASA through a contract issued by Space Telescope Science Institute for support of Early Release Science observations with JWST and in-kind contributions by contributors at the University of Heidelberg, Rhodes College, Johns Hopkins University, and University of Maryland College Park.

license GNU GPL v.3.0

Contents:

Indices and tables