ACDS V10.0 - Fri Apr 19 22:31:42 CEST 2019
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Detailed Description of VIII/82 : 2nd Epoch Molonglo Galactic Plane Survey (MGPS-2) (Murphy+, 2007)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
VIII/82 2nd Epoch Molonglo Galactic Plane Survey (MGPS-2) (Murphy+, 2007)
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The 2nd Epoch Molonglo Galactic Plane Survey (MGPS-2), Version 15 August 2007.
Murphy T., Mauch T., Green A., Hunstead R.W., Piestrzynska B.,
Kels A.P., Sztajer P.
<Mon. Not. R. Astron. Soc. 382, 382 (2007)>
=2007MNRAS.382..382M
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ADC_Keywords: Galactic plane ; Radio sources ; Surveys ; Radio continuum
Keywords: catalogues - surveys - methods: data analysis - radio continuum: ISM -
Galaxy: general
Description:
The MGPS-2 (second epoch Molonglo Galactic Plane Survey) was carried
out with the Molonglo Observatory Synthesis Telescope at a frequency
of 843MHz and with a restoring beam of 45"x45"csd|{delta}|, making
it he highest resolution large scale radio survey of the southern
Galactic plane. It covers the range |b|<10° and 245<l<365°;
it is the Galactic counterpart to the SUMSS (Cat. VIII/81) which covers
the southern sky ({delta}<-30°, |b|>10°).
This catalogue (15-Aug-2007) consists of 48850 compact sources, made
by fitting elliptical gaussians in the MGPS-2 mosaics to a limiting
peak brightness of 10mJy/beam. We used a custom method (described in
the associated publication) to remove extended sources from the
catalogue. Positions in the catalogue are accurate to 1-2".
See http://www.astrop.physics.usyd.edu.au/mosaics for access to the
mosaic images.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× mgpscat.dat 179 48850 The MGPS-2 Catalog, Version 1.0 (2007-08-15)
See also:
VIII/78 : Sydney University Molonglo Sky Survey (SUMSS) (Mauch+ 2006)
http://www.physics.usyd.edu.au/ioa/Main/MGPS2 : the MGPS-2 Home Page
Byte-by-byte Description of file: mgpscat.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [MGPS]
6- 19 A14 --- MGPS MGPS designation (JHHMMSS-DDMMSS)
21- 31 F11.7 deg GLON Galactic longitude (degrees)
33- 43 F11.7 deg GLAT Galactic latitude (degrees)
45- 46 I2 h RAh Right Ascension J2000 (hours)
48- 49 I2 min RAm Right Ascension J2000 (minutes)
51- 55 F5.2 s RAs Right Ascension J2000 (seconds)
58 A1 --- DE- Declination J2000 (sign)
59- 60 I2 deg DEd Declination J2000 (degrees)
62- 63 I2 arcmin DEm Declination J2000 (minutes)
65- 69 F5.2 arcsec DEs Declination J2000 (seconds)
71- 74 F4.1 arcsec e_RAs rms uncertainty in Right Ascension (1)
76- 79 F4.1 arcsec e_DEs rms uncertainty in Declination (1)
83- 89 F7.1 mJy Sp Peak brightness at 843MHz (in mJy/beam)
91- 96 F6.1 mJy e_Sp Uncertainty on Sp
99-106 F8.1 mJy St Total flux density at 843MHz
108-113 F6.1 mJy e_St Uncertainty on St
116-121 F6.1 arcsec MajAxis Fitted major axis
123-127 F5.1 arcsec MinAxis Fitted minor axis
129-133 F5.1 deg PA Fitted major axis position angle (N to E)
136-141 F6.1 arcsec dMajAxis Fitted major axis after deconvolution (2)
143-147 F5.1 arcsec dMinAxis Fitted minor axis after deconvolution (2)
149-153 F5.1 deg dPA ? Fitted major axis position angle
after deconvolution
156-163 A8 --- Mosaic Mosaic in which the source appears (3)
165 I1 --- Nm Number of mosaics with the source (4)
167-172 F6.1 pix Xpos Position of the source on quoted mosaic (4)
174-179 F6.1 pix Ypos Position of the source on quoted mosaic (4)
Note (1): Positional uncertainties are calculated from the quadratic
sum of the MOST calibration using Equations (1) and (2) of the paper.
Note (2): If the fitted major axis size exceeds the beam size by more than
2.33{sigma}({theta}M), the major axis size after deconvolution from
the MOST beam is given in arcseconds.
Note (3): The naming scheme for MGPS-2 mosaics is JHHMMMDD indicating the
J2000 RA and Dec of the mosaic centre. The original mosaics are
available online at http://www.astrop.physics.usyd.edu.au/mosaics
In the case of duplicate matches the mosaic name quoted is that used
for the fit which is chosen to be included in the catalogue.
Note (4): When the source appears in more than one image, the source
parameters are those of the most reliable fit.
Nomenclature Notes:
MGPS-2 sources should be referred by their truncated position
MGPS JHHMMSS-DDMMSS
Acknowledgements:
Tara Murphy, tara(at)physics.usyd.edu.au
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(End) Patricia Vannier [CDS] 17-Aug-2007