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J/ApJS/155/577      H2O masers in W49 North and Sagittarius B2  (McGrath+, 2004)
H2O masers in W49 north and Sagittarius B2.
    McGrath E.J., Goss W.M., De Pree C.G.
   <Astrophys. J. Suppl. Ser., 155, 577-593 (2004)>
   =2004ApJS..155..577M
ADC_Keywords: H II regions ; Masers

Keywords: H II regions - ISM: individual (Sagittarius B2, W49A) - masers


Abstract:
    Using the Very Large Array (VLA) of the National Radio Astronomy
    Observatory in the A and B configurations, we have obtained
    simultaneous high-resolution observations of both the 22GHz H2O maser
    lines as well as the 22GHz continuum for the H II regions W49N and
    Sagittarius B2.

Description:
    Observations of W49N and Sgr B2 were carried out with the VLA in both
    A and B configurations using the correlator in line mode with two
    intermediate frequencies (IFs) at 22GHz, in 1998 and 1999.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tables.dat        62      494  *Water maser positions and velocities

Note on tables.dat: Objects identified as [MGD2004] HHMMSS.sss+DDMMSS.ss



Byte-by-byte Description of file: tables.dat

   Bytes Format Units   Label     Explanations

   1- 15  A15   ---     Region    Region (1)
  17- 18  I2    h       RAh       Right ascension (B1950)
  20- 21  I2    min     RAm       Right ascension (B1950)
  23- 28  F6.3  s       RAs       Right Ascension (B1950) (2)
      30  A1    ---     DE-       Declination sign (B1950)
  31- 32  I2    deg     DEd       Declination (B1950)
  34- 35  I2    arcmin  DEm       Declination (B1950)
  37- 41  F5.2  arcsec  DEs       Declination (B1950) (2)
  43- 48  F6.1  km/s    VLSR      Local Standard of Rest velocity
  50- 56  F7.2  Jy      S22GHz    The 22GHz flux density
  58- 62  F5.2  Jy      e_S22GHz  The error in S22GHz

Note (1): Regions are W49A North, SgrB2 Main, SgrB2 Mid-North, SgrB2 North
          and SgrB2 South
Note (2): Relative positional errors are ∼0.005arcsec in RA and DE.
          Absolute errors are ∼0.05arcsec.


History:
    From electronic version of the journal
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    23-Jan-2007