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Code Block
languagesql
linenumbersfalse
select data.*,
flux_cal.obsid as flux_calibrator_obs_id,
pol_cal.obsid as pol_calibrator_obs_id  from apertif_dr1.continuum_images data
join  apertif_dr1.flux_cal_visibilities flux_cal on data.obsid=flux_cal.used_for and data.beam_number=flux_cal.beam
join apertif_dr1.pol_cal_visibilities pol_cal on data.obsid=pol_cal.used_for and data.beam_number=pol_cal.beam
order by obsid

HiPS

Data Usage Policy

Papers making use of this data should include the following acknowledgement:

This work makes use of data from the Apertif system installed at the Westerbork Synthesis Radio Telescope owned by ASTRON. ASTRON, the Netherlands Institute for Radio Astronomy, is an institute of the Dutch Research Council (“De Nederlandse Organisatie voor Wetenschappelijk Onderzoek, NWO).

In addition, they should include the LoTSS DR2 PID:

CHECK DOI

and cite the imaging survey data release paper. This is not yet available but should be soon. Until then, it can be referenced as:

Shimwell, T.W., et al. “The LOFAR Two-metre Sky Survey (LoTSS). V. Second data release" accepted for publication in Astronomy & Astrophysic