The LOFAR Two Meter Sky Survey LoTSS DR2
(:bibcode:`2022A&A...659A...1S`) obtained radio data from 27% of the
northern sky between 120 and 168 MHz in the year 2014 through 2020. This
service publishes polarization spectra of extragalactic radio sources
(radio galaxies and blazars) and the rotation measures derived from them.
We also give redshifts for all sources. The data has a spatial resolution
of 20 arcsec.
The LOFAR Two Meter Sky Survey LoTSS DR2
(:bibcode:`2022A&A...659A...1S`) obtained radio data from 27% of the
northern sky between 120 and 168 MHz in the year 2014 through 2020. This
service publishes polarization spectra of extragalactic radio sources
(radio galaxies and blazars) and the rotation measures derived from them.
We also give redshifts for all sources. The data has a spatial resolution
of 20 arcsec.
These spectra are optical follow-up observations of the
X-ray sources detected in the 942 ks exposure of the
Chandra Deep Field-South (CDFS) using FORS.
An archive of optical and near-infrared spectra of strongly lensed
quasars and the lensing galaxies. The spectra are resolved to about a
few Ångstroms and are flux-calibrated. The spectra resulted from
deblending the lensed images in bidimensional spectra available from
the SSAP service for `ivo://org.gavo.dc/mlqso/q/s
<http://dc.zah.uni-heidelberg.de/mlqso/q/s/info>`_.