Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Reference Galaxy Standards for HI Emission Observations   We have taken advantage of the improved baselines and higher sensitivity
available with the upgraded Arecibo 305m telescope to create a new HI spectral
line catalog of disk galaxies which can be used as a reference catalog for
anyone interested in 21-cm spectral line work. In all 108 galaxies were
observed, covering 24h of the sky at declinations between 0 < delta < 36
degrees and velocities between 0 - 25,000 km s-1. The majority of the galaxies
were observed at least two times on different nights to avoid problems with
RFI, baselines fluctuations, etc. Comparing our measured values with all those
available in the literature show that while large individual variations may
exist, the average differences between the measurements to be zero. In all we
have considerable confidence in our measurements, and the resultant catalog
should be extremely useful as a well defined reference catalog for anyone
interested in 21-cm spectral line work.

11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics