J/ApJ/429/253 W49N H2O masers (Gwinn, 1994)
Physical structure of H2O masers in W49N
Gwinn C.R.
<Astrophys. J. 429, 253 (1994)>
=1994ApJ...429..253G 1994ApJ...429..253G (SIMBAD/NED BibCode)
ADC_Keywords: Masers ; Radio lines ; VLBI
Keywords: masers ISM: molecules - ISM: jets and outflows -
ISM: individual (W49) - ISM: kinematics and dynamics
Description:
VLBI observations of a H2O maser were done at five epochs in 1980-82
with a 5 station VLBI network (see 1992ApJ...393..149G 1992ApJ...393..149G). A model was
fitted to each peak in any spectral channel exceeding 5 times the rms
background. The minimum level of this background, due to system noise
at the antennas, was about 0.2Jy at each epoch. The model parameters
include right ascension and declination offset (x, y) relative to a
reference position; the total flux density, S; and the angular
diameter θH, of the best-fitting Gaussian distribution of
intensity. The fitted parameters are in table1.
Objects:
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RA (2000) DE Designation(s)
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19 10 13.1 +09 06 12 W 49N
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 41 271 Features observed 1982 March 6
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 3 I3 --- [G94] Sequential number
5- 11 F7.4 mas oRA Right ascension offset from a reference position
13- 19 F7.4 mas oDE Declination offset from a reference position
21- 26 F6.1 km/s Vz Doppler velocity
28- 30 F3.1 km/s DVz Line width
32- 36 I5 Jy Sp Peak flux density
38- 41 F4.2 mas Theta Angular size
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History: Scanned and processed via OCR at CDS.
(End) James Marcout, Patricia Bauer, [CDS] 09-Aug-1996