[ CATS home ] [ Back to CATS list ]
[ ftp ]
1986ApJS...61....1Bennett+ First ADS
1990ApJS...72..621Langston+ Second ADS
1990ApJS...74..129Griffith+ Third ADS
1991ApJS...75..801Griffith+ Fourth ADS
Abstracts for MIT-Green Bank surveys I through IV
The MIT - Green Bank 5 GHz Survey.
ABSTRACT. The MIT-Green Bank (MG) 5 GHz survey covers 1.87 sr of
sky in the declination range between -0.508 and 19.496 degrees,
and galactic latitude, b, above |b| > 10 degrees. The MG catalog
contains 5974 sources with a signal-to-noise ratio greater than 5.
A supplemental catalog contains 3836 possible detections with a
signal-to-noise ratio less than 5. The MG catalog is essentially
complete to its 5 sigma limit, which varies with declination from
53 to 106 mJy. The reliability of the main list has been measured
to be 96 %, with a completeness of 95 %. Estimated position
errors are +/- 28 arc seconds in right ascension and +/- 22
arc seconds in declination. Flux density errors are a function
of flux density.
The MG survey sources are compared with sources from the 365 MHz
Texas survey (Douglas et al. 1980, Univ. Texas Pub. Astro. No. 17).
Spectral indices are computed for coincident sources, and the
distribution of spectral indices is discussed. Follow-up
observations using the VLA and other instruments are discussed.
The source names are derived from the J2000 coordinates preceded
by the two characters MG.
Published: Astrophysical Journal Supplement Series, Vol. 61,
pages 1-104, 1986 May
CHARLES BENNETT:
NASA/Goddard Space Flight Center, Code 697, Greenbelt MD. 20771
BERNARD BURKE, JACQUELINE HEWITT, CHARLES LAWRENCE, and JAMES MAHONEY:
Room 26-335, Massachusetts Institute of Technology,
Cambridge, MA 02139 (Phone 1-617-253-3074)
Information available from
GLEN LANGSTON: National Radio Astronomy Observatory
Edgemont Rd., Charlottesville VA 22903 (Phone 1-804-296-0328)
Second MIT - Green Bank 5 GHz Survey.
ABSTRACT. The MIT-Green Bank II (MG II) 5 GHz survey covers 1.51 sr of
sky in the right ascension range 4 to 21 hours, between 17 and 39.15
degrees declination (J2000). The final MG II catalog contains 6182
sources detected with a signal-to-noise ratio greater than 5. The
catalog was produced from two separate north and south surveys with the
National Radio Astronomy Observatory (NRAO) 91m transit telescope. The
north survey was produced from data collected scanning the telescope
north from 19.0 to 39.15 degrees declination and the south survey from
data collected from scans between 37.15 and 17 degrees declination. The
completeness and reliability of the final source list is checked by
examination of the north and south source lists in a comparison region,
lying between 19.15 and 37 degrees and above 10 degrees north galactic
latitude. The comparison region covers 0.884 sr of sky and contains
3384 sources. In this region, the catalog contains 1387 sources
brighter than 90 mJy and is shown to be 99.9% complete at this flux
density level. Spectral indices are computed for sources identified in
the NRAO 1400 MHz Survey (Condon and Broderick 1985).
The source names are derived from the J2000 coordinates preceded
by the three characters MGB. The MG I, MG III and MG IV observations
have prefixes MG, MGC, and MGD respectively.
Published: Astrophysical Journal Supplement Series, Vol. 72, pages 621-691
1990 March
GLEN LANGSTON: National Radio Astronomy Observatory
Edgemont Rd., Charlottesville VA 22903
(Phone 1-804-296-0328)
BERNARD BURKE, CHRIS CARRILLI, SAM CONNER, MIKE HEFLIN, and JOSEPH LEHAR:
Room 26-335, Massachusetts Institute of Technology, Cambridge, MA 02139
(Phone 1-617-253-3074)
The Third MIT - Green Bank 5 GHz Survey.
ABSTRACT. The MIT-Green Bank III (MG III) 5 GHz survey covers 1.11
sr of sky in the right ascension range 16.5 to 5 hours, between +17
and +39.15 degrees declination (B1950). The final MG III catalog
contains 4761 sources detected with a signal-to-noise ratio greater
than 5. The catalog was produced from two separate north and south
surveys with the National Radio Astronomy Observatory (NRAO) 91
meter transit telescope. The north survey was produced from data
collected while scanning the telescope north from +19.0 to +39.15
degrees declination and the south survey from data collected from
scans from +37.15 to +17 degrees declination. The completeness and
reliability of the final source list is checked by examination of
north and south source lists in a twice observed comparison region,
lying between +19.15 and +37 degrees and below -10 degrees galactic
latitude. The comparison region covers 0.569 sr of sky and contains
2412 sources. In this region, the MG III catalog contains 917
sources brighter than 90 mJy and is shown to be 99.8 +/-0.4 %
complete at this flux density level. Spectral indices are computed
for sources identified in the NRAO 1400 MHz Survey (Condon and
Broderick 1985).
The source names are derived from the J2000 coordinates preceded
by the three characters MGC. The MG I, MG II and MG IV observations
have prefixes MG, MGB, and MGD respectively.
Published: Astrophysical Journal Supplement Series, 1990 September
ApJSS, 74, 129-224, 1990 Sep.
MARK GRIFFITH,
BERNARD BURKE, SAM CONNER, MIKE HEFLIN, and JOSEPH LEHAR:
Room 26-335, Massachusetts Institute of Technology,
Cambridge, MA 02139 (Phone 1-617-253-2572)
GLEN LANGSTON:
National Radio Astronomy Observatory
Edgemont Rd., Charlottesville VA 22903
(Phone 1-804-296-0328)
Fourth MIT - Green Bank 5 GHz Survey.
ABSTRACT:
The MIT-Green Bank IV (MG IV) 5 GHz survey covers 0.504 sr of sky
in the right ascension range 15.5 to 2.5 hours, between +37.00 and
+50.98 degrees declination (B1950). The final MG IV catalog
contains 3427 sources detected with a signal-to-noise ratio
greater than 5. The catalog was produced from two separate north
and south surveys with the National Radio Astronomy Observatory
(NRAO) 91m transit telescope. The north survey was produced from
data collected while scanning the telescope north from +39.0 to
+50.98 degrees declination and the south survey from data collected
from scans from +48.98 to +37.00 degrees declination. The
completeness and reliability of the final source list is checked by
examination of north and south source lists in a twice observed
comparison region, lying between +39.15 and +48.83 degrees
declination and excluding the area between +/-10 degrees Galactic
latitude. The comparison region covers 0.270 sr of sky and
contains 1094 sources. In this region, the MG IV catalog contains
423 sources brighter than 90 mJy and is shown to be 99.1 +/- 1.2%
complete at this flux density level. Spectral indices are computed
for sources identified in the NRAO 1400 MHz Survey (published by
Condon and Broderick in 1985). A comparison of the spectral index
distributions between +/- 10 and outside of +/- 10 degrees Galactic
latitude is presented.
The source names are derived from the J2000 coordinates preceded
by the three characters MGD. The MG I, MG II and MG III observations
have prefixes MG, MGB, and MGC respectively.
Published: Submitted to Astrophysical Journal Supplement Series
AJSS, 75, 801-833, 1991 March
MARK GRIFFITH,
BERNARD BURKE, SAM CONNER, and MIKE HEFLIN:
Room 26-335, Massachusetts Institute of Technology,
Cambridge, MA 02139 (Phone 1-617-253-2572)
GLEN LANGSTON:
National Radio Astronomy Observatory , Edgemont Road,
Charlottesville, Va 22903 (Phone 1-804-296-0328)
Structure of catalogs
MG_i.dat(A004)
Name RA 1950 DEC 1950 mJy S/N Spec(S=S0*v**f)
MGA0000+1903 23 57 46.4 18 46 52 72 6.0 -0.52
MGA0000+0306 23 57 51.2 2 50 11 118 7.0
MGA0000+1855 23 57 59.0 18 38 21 129 10.7
MG_i.sup(A004) (< 5 sigma)
MGA0001+0633 23 58 45.9 6 16 19 62 3.9
MGA0001+1353 23 58 52.4 13 36 36 66 4.8
MGA0001+0723 23 59 1.3 7 6 21 71 4.4
MGA0001+1819 23 59 21.1 18 3 2 49 4.0 -1.10
MG_ii.dat(A005)
Name RA 1950 DEC 1950 mJy S/N G Spec
MGB0400+3645 3 57 8.4 36 36 53 50 6 7 -2.47
MGB0400+3649 3 57 10.2 36 41 23 53 6 7 -2.31
MGB0400+3246 3 57 15.6 32 38 7 51 6 7 -1.29
MG_iii.dat(A013)
Name RA 1950 DEC 1950 mJy S/N G Spec
MGC0002+3032 0 0 14.0 30 15 31 66 8 6 -0.79
MGC0002+3043 0 0 20.3 30 26 32 51 5 6 -1.11
MGC0003+3747 0 0 35.8 37 30 33 51 5 4
MG_iv.dat (A012)
Name RA 1950 DEC 1950 mJy S/N G Spec
MGD0002+4820 0 0 2.4 48 3 57 153 15 6 0.59
MGD0003+4806 0 1 1.1 47 49 44 160 26 8
MGD0003+4602 0 1 9.6 45 45 31 105 12 6 -0.17