In this repository, we provide data files in connection to our publication “Constraints on axionlike particles from a combined analysis of three flaring Fermi flat-spectrum radio quasars” submitted for publication in Physical Review D and available on the Arxiv: https://arxiv.org/abs/2211.03414 In the paper, we analyze data from the Fermi Large Area Telescope (LAT) of three flat spectrum radio quasars (FSRQs): 3C454.3, 3C279, and CTA102, to search for signatures of oscillations between photons and axion-like particles (ALPs). In this repository, we provide the following data: Files ending on *_data_seds.npy contain the spectral energy distributions (SEDs) measured with the Fermi LAT and extracted using the fermipy software Files ending on *_LLs.npy contain the log-likelihood values of our fits over a grid of ALP masses and photon-ALP couplings Files ending on *_Lambdas.npy contain the log-likelihood ratio test values of our fits over a grid of ALP masses and photon-ALP couplings Files ending on *_LL_thresh.npy contain the threshold values for the log-likelihood ratio test for which we can claim an exclusion at the 95% confidence level over a grid of ALP masses and photon-ALP couplings Files ending on*_contours.npy contain the upper limit contours. Files starting with "ALL" contain the likelihoods combined over all sources We also provide a minimal jupyter notebook, analysis_arrays.ipynb, that demonstrates how to read in the files.