FRB Line-of-sight Ionization Measurement From Lightcone AAOmega Mapping Survey: the First Data Release

TL;DR

The FLIMFLAM survey provides the first public spectroscopic data release for 10 FRB fields, enabling detailed analysis of line-of-sight ionization and matter density with high completeness and multi-scale coverage.

Contribution

This work introduces the first data release of the FLIMFLAM survey, offering extensive spectroscopic measurements across multiple scales for FRB fields, facilitating future ionization and matter density studies.

Findings

Spectroscopic completeness of 48.43%

Over 80% of targets have secure redshifts

Data covers 26 deg^2 across 10 FRB fields

Abstract

This paper presents the first public data release (DR1) of the FRB Line-of-sight Ionization Measurement From Lightcone AAOmega Mapping (FLIMFLAM) Survey, a wide field spectroscopic survey targeted on the fields of 10 precisely localized Fast Radio Bursts (FRBs). DR1 encompasses spectroscopic data for 10,468 galaxy redshifts across 10 FRBs fields with z<0.4, covering approximately 26 deg^2 of the sky in total. FLIMFLAM is composed of several layers, encompassing the `Wide' (covering ~ degree or >10 Mpc scales), `Narrow', (several-arcminute or ~ Mpc) and integral field unit (`IFU'; ~ arcminute or ~ 100 kpc ) components. The bulk of the data comprise spectroscopy from the 2dF-AAOmega on the 3.9-meter Anglo-Australian Telescope, while most of the Narrow and IFU data was achieved using an ensemble of 8-10-meter class telescopes. We summarize the information on our selected FRB fields, the criteria for target selection, methodologies employed for data reduction, spectral analysis processes, and an overview of our data products. An evaluation of our data reveals an average spectroscopic completeness of 48.43%, with over 80% of the observed targets having secure redshifts. Additionally, we describe our approach on generating angular masks and calculating the target selection functions, setting the stage for the impending reconstruction of the matter density field.