Reproduction package for the paper "Transient study using LoTSS – framework development and preliminary results"

arXiv (Cornell University)

Abstract

This is a basic reproduction package for the paper "Transient study using LoTSS – framework development and preliminary results" by de Ruiter et al. (2024). The folders analysis, P164+55, simulations, source_finder and transient_rates have been compressed. Raw Data The visibilities that are used to create the subtraction images for the LoFAR Two-metre Sky Survey (LoTSS) can be found in the following Surf repository. Software A script to perform the sky model subtraction exists within the pipeline for the LoTSS processing. The imaging software WSClean can be downloaded here and a manual to get started can be found here. The command that was used to create the subtraction images is (as described in Table 1 of the paper): wsclean -name subtract_images_8sec_P164+55_pad/P164+55 -weight briggs -0.25 -padding 2.0 -no-reorder -niter 0 -size 2200 2200 -scale 6asec -pol I -intervalsout 3600 -no-dirty P164+55_object.dysco.sub.shift.avg.weights.ms.archive0 The scripts for source finding and filtering of the transient candidates are given in source_finder/ and analysis/. A detailed description of how to use this is given in subtraction images transient pipeline.pdf. Also the required for python packages are described in detail here. Figures and Tables simulations/ The jupyter notebook visualise_simulated_transients.ipynb can be used to visualize the 8 second and 1 hour simulated transient sources. transient_rates/ The jupyter notebook transient_rates.ipynb can be used to recreate the limits on the transient surface density (Figure 13). Intermediate data products This subtraction images for a single pointing are available in this reproduction package in P164+55/ The subtraction images for all the pointings have a total size of 2.8 TB, therefore, we only include the P164+55 pointing. The subtraction images for the 1hr snapshots, 2 minute snapshots and most of the 8 second snapshots (up to 50 GB) have been included. The subtraction images for other pointings can be requested by sending an email to irisderuiter7@gmail.com The subtraction images with simulated transients are included in simulations/

Authors 6

1. Iris de Ruiter

   University of Amsterdam

   Affiliation as printed

   Anton Pannekoek Institute for Astronomy , University of Amsterdam , Science Park 904 , NL-1098 XH Amsterdam , the Netherlands

2. Zachary Samuel Meyers

   Friedrich-Alexander-Universität Erlangen-Nürnberg · Deutsches Elektronen-Synchrotron DESY

   Affiliation as printed

   Deutsches Elektronen-Synchrotron DESY , Platanenallee 6 , 15738 Zeuthen , Germany

   Erlangen Center for Astroparticle Physics (ECAP) , Friedrich-Alexander-Universität Erlangen-Nuremberg , 91058 Erlangen , Germany

3. A. Rowlinson

   University of Amsterdam · Netherlands Institute for Radio Astronomy

   Affiliation as printed

   ASTRON , the Netherlands Institute for Radio Astronomy , Postbus 2 , NL-7990 AA Dwingeloo , the Netherlands

   Anton Pannekoek Institute for Astronomy , University of Amsterdam , Science Park 904 , NL-1098 XH Amsterdam , the Netherlands

4. T. W. Shimwell Aachen Leiden Observatory

   Leiden University · Leiden Observatory · Netherlands Institute for Radio Astronomy

   Affiliation as printed

   ASTRON , the Netherlands Institute for Radio Astronomy , Postbus 2 , NL-7990 AA Dwingeloo , the Netherlands

   Leiden Observatory , Leiden University , P.O. Box 9513 , NL-2300 RA Leiden , the Netherlands

5. David Ruhe

   University of Amsterdam

   Affiliation as printed

   AI4Science (AMLab) , Informatics Institute , University of Amsterdam , The Netherlands

   Anton Pannekoek Institute for Astronomy , University of Amsterdam , Science Park 904 , NL-1098 XH Amsterdam , the Netherlands

6. Ralph A. M. J. Wijers

   University of Amsterdam

   Affiliation as printed

   Anton Pannekoek Institute for Astronomy , University of Amsterdam , Science Park 904 , NL-1098 XH Amsterdam , the Netherlands