The BINGO Project I: Baryon Acoustic Oscillations from Integrated
  Neutral Gas Observations
  Observations of the redshifted 21-cm line of neutral hydrogen (HI) are a new
and powerful window of observation that offers us the possibility to map the
spatial distribution of cosmic HI and learn about cosmology. BINGO (Baryon
Acoustic Oscillations [BAO] from Integrated Neutral Gas Observations) is a new
unique radio telescope designed to be one of the first to probe BAO at radio
frequencies. BINGO has two science goals: cosmology and astrophysics. Cosmology
is the main science goal and the driver for BINGO's design and strategy. The
key of BINGO is to detect the low redshift BAO to put strong constraints in the
dark sector models. Given the versatility of the BINGO telescope, a secondary
goal is astrophysics, where BINGO can help discover and study Fast Radio Bursts
(FRB) and other transients, Galactic and extragalactic science. In this paper,
we introduce the latest progress of the BINGO project, its science goals,
describing the scientific potential of the project in each science and the new
developments obtained by the collaboration. We introduce the BINGO project and
its science goals and give a general summary of recent developments in
construction, science potential and pipeline development obtained by the BINGO
collaboration in the past few years. We show that BINGO will be able to obtain
competitive constraints for the dark sector, and also that will allow for the
discovery of several FRBs in the southern hemisphere. The capacity of BINGO in
obtaining information from 21-cm is also tested in the pipeline introduced
here. There is still no measurement of the BAO in radio, and studying cosmology
in this new window of observations is one of the most promising advances in the
field. The BINGO project is a radio telescope that has the goal to be one of
the first to perform this measurement and it is currently being built in the
northeast of Brazil. (Abridged)
