[ CATS home ] [ Back to CATS list ]
[ ftp ]
1994ApJS...93..145Kollgaard+
A Sensitive 1.5 GHz Radio Survey Around the North Ecliptic Pole
Kollgaard R.I., W.Brinkmann, M. McMath Vhester, E.D. Feigelson,
P. Hertz, P. Reich and R. Wielebinski
Abstract
A 29.3 deg^2 region surrounding the north ecliptic pole (NEP;
RA=18h00m, dec = 66^o30') was mapped with VLA at 1.5 GHz to support
the deepest portion of the ROSAT all-sky soft X-ray survey. The resulting
VLA-NEP survey catalog contains 2435 radio sources with flux densities in
the range of 0.3-1000 mJy, including over 200 fainter than 1 mJy.
The 28 fields of the inner 1.5^o have noise levels sigma =~60 muJy, and the
85 fields centered between 1.5^o and 3.0^o from the NEP have sigma =~120 muJy.
The typical spatial resolution is 20" HPBW, and most positions are accurate
to < 2". Approximately 6% of the sources are found to be extended with size
>30". We have compared the VLA-NEP catalog with four other radio catalogs
made at lower resolution, as well as with NASA Extragalactic Database
and find counterparts for ~18 % of the VLA-NEP objects. The normalized,
differentail radio source count is in agreement with previous studies.
Between 1 and 150 mJy the slope of the logN - logS relation is
0.68+-0.03.
The catalog and related tables are available electronically.
The VLA-NEP catalog
Table 2 gives the resulting VLA-NEP source catalog.
! 1 2 3 - 5 6 - 8 " center flux
+------------+------+------+------+------+------+------+-------+-------+------+--------+------------+--------+---------
|jname |fld |ra 2000. |dec 2000. | err |dis |Stot err|S_peak err|snr|idf|susf|extf|ff|sep| pa |rel_name
+------------+-----------------------------+------+----+-----------+--------------+--+-------+---+------+------+-------
J1726.3+6642 1 17 26 20.29 66 42 14.7 2.6 24.5 38.5 5.2 46.4 5.5 12 0.0