MOSS I: Double radio relics in the Saraswati supercluster
  Superclusters are the largest objects in the Universe, and they provide a
unique opportunity to study how galaxy clusters are born at the junction of the
cosmic web as well as the distribution of magnetic fields and relativistic
particles beyond cluster volume. The field of radio astronomy is going through
an exciting and important era of the Square Kilometer Array (SKA). We now have
the most sensitive functional radio telescopes, such as the MeerKAT, which
offers high angular resolution and sensitivity towards diffuse and faint radio
sources. To study the radio environments around supercluster, we observed the
(core part of) {\it Saraswati} supercluster with the MeerKAT. From our MeerKAT
Observation of the {\it Saraswati} Supercluster (MOSS) project, the initial
results of the pilot observations of two massive galaxy clusters, A2631 and
ZwCl2341.1+0000, which are located around the dense central part of the {\it
Saraswati} supercluster, were discussed. In this paper, we describe the
observations and data analysis details, including direction-dependent
calibration. In particular, we focus on the ZwCl2341.1+0000 galaxy cluster,
which hosts double radio relics and puzzling diffuse radio source in the
filamentary network. We have imaged these double radio relics in our high
resolution and sensitive L-band MeerKAT observation and a puzzling radio
source, located between relics, in the low-resolution image. We also derived
the spectra of double radio relics using MeerKAT and archival GMRT
observations. A following papers will focus on the formation of radio relics
and halo, as well as radio galaxy properties in a supercluster core
environment.
