Pilot study and early results of the Cosmic Filaments and Magnetism
  Survey with Nenufar: the Coma cluster field
  NenuFAR, the New Extension in Nancay Upgrading LOFAR, is currently in its
early science phase. It is in this context that the Cosmic Filaments and
Magnetism Pilot Survey is observing sources with the array as it is still under
construction - with 57 (56 core, 1 distant) out of a total planned 102 (96
core, 6 distant) mini-arrays online at the time of observation - to get a first
look at the low-frequency sky with NenuFAR. One of its targets is the Coma
galaxy cluster: a well-known object, host of the prototype radio halo. It also
hosts other features of scientific import, including a radio relic, along with
a bridge of emission connecting it with the halo. It is thus a well-studied
object. In this paper, we show the first confirmed NenuFAR detection of the
radio halo and radio relic of the Coma cluster at 34.4 MHz, with associated
intrinsic flux density estimates: we find an integrated flux value of 106.3 +-
3.5 Jy for the radio halo, and 102.0 +- 7.4 Jy for the radio relic. These are
upper bound values, as they do not include point-source subtraction. We also
give an explanation of the technical difficulties encountered in reducing the
data, along with steps taken to resolve them. This will be helpful for other
scientific projects which will aim to make use of standalone NenuFAR imaging
observations in the future.
