A Caltech Library Service

LZIFU: an emission-line fitting toolkit for integral field spectroscopy data

Ho, I-Ting and Medling, Anne M. and Groves, Brent and Rich, Jeffrey A. and Rupke, David S. N. and Hampton, Elise and Kewley, Lisa J. and Bland-Hawthorn, Joss and Croom, Scott M. and Richards, Samuel and Schaefer, Adam L. and Sharp, Rob and Sweet, Sarah M. (2016) LZIFU: an emission-line fitting toolkit for integral field spectroscopy data. Astrophysics and Space Science, 361 (9). Art. No. 280. ISSN 0004-640X.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present lzifu (LaZy-IFU), an idl toolkit for fitting multiple emission lines simultaneously in integral field spectroscopy (IFS) data. lzifu is useful for the investigation of the dynamical, physical and chemical properties of gas in galaxies. lzifu has already been applied to many world-class IFS instruments and large IFS surveys, including the Wide Field Spectrograph, the new Multi Unit Spectroscopic Explorer (MUSE), the Calar Alto Legacy Integral Field Area (CALIFA) survey, the Sydney-Australian-astronomical-observatory Multi-object Integral-field spectrograph (SAMI) Galaxy Survey. Here we describe in detail the structure of the toolkit, and how the line fluxes and flux uncertainties are determined, including the possibility of having multiple distinct kinematic components. We quantify the performance of lzifu, demonstrating its accuracy and robustness. We also show examples of applying lzifu to CALIFA and SAMI data to construct emission line and kinematic maps, and investigate complex, skewed line profiles presented in IFS data. The code is made available to the astronomy community through github. lzifu will be further developed over time to other IFS instruments, and to provide even more accurate line and uncertainty estimates.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper ReadCube access
Ho, I-Ting0000-0002-0757-9559
Medling, Anne M.0000-0001-7421-2944
Groves, Brent0000-0002-9768-0246
Rich, Jeffrey A.0000-0002-5807-5078
Kewley, Lisa J.0000-0001-8152-3943
Bland-Hawthorn, Joss0000-0001-7516-4016
Croom, Scott M.0000-0003-2880-9197
Richards, Samuel0000-0002-5368-0068
Sweet, Sarah M.0000-0002-1576-2505
Additional Information:© 2016 Springer Science+Business Media Dordrecht. Received: 06 April 2016; Accepted: 15 July 2016; First Online: 03 August 2016. We thank the referee for constructive comments that improve the quality of this work. LJK gratefully acknowledges the support of an ARC Future Fellowship, and ARC Discovery Project DP130103925. SMC acknowledges the support of an Australian Research Council Future Fellowship (FT100100457). The SAMI Galaxy Survey is based on observations made at the Anglo-Australian Telescope. The Sydney-AAO Multi-object Integral field spectrograph was developed jointly by the University of Sydney and the Australian Astronomical Observatory. The SAMI input catalogue is based on data taken from the Sloan Digital Sky Survey, the GAMA Survey and the VST ATLAS Survey. The SAMI Galaxy Survey is funded by the Australian Research Council Centre of Excellence for All-sky Astrophysics, through project number CE110001020, and other participating institutions. The SAMI Galaxy Survey website is This study makes uses of the data provided by the Calar Alto Legacy Integral Field Area (CALIFA) survey ( Based on observations collected at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck-Institut für Astronomie and the Instituto de Astrofisica de Andalucia (CSIC).
Funding AgencyGrant Number
Australian Research CouncilDP130103925
Australian Research CouncilFT100100457
Subject Keywords:Integral field spectroscopy; Data analysis; Emission line fitting
Issue or Number:9
Record Number:CaltechAUTHORS:20161014-074941844
Persistent URL:
Official Citation:Ho, IT., Medling, A.M., Groves, B. et al. Astrophys Space Sci (2016) 361: 280. doi:10.1007/s10509-016-2865-2
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71081
Deposited By: Ruth Sustaita
Deposited On:14 Oct 2016 17:01
Last Modified:04 Nov 2019 00:58

Repository Staff Only: item control page