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J/MNRAS/359/1498    Class I and class II methanol masers     (Ellingsen+, 2005)
The relationship between class I and class II methanol masers.
    Ellingsen S.P.
   <Mon. Not. R. Astron. Soc., 359, 1498-1516 (2005)>
   =2005MNRAS.359.1498E
ADC_Keywords: Masers ; Radio sources ; Radio lines

Keywords: masers - ISM: molecules - radio lines: general - stars: formation


Abstract:
    The Australia Telescope National Facility Mopra millimetre telescope
    has been used to search for 95.1-GHz class I methanol masers towards
    62 6.6-GHz class II methanol masers. A total of 26 95.1-GHz masers
    were detected, 18 of these being new discoveries. Combining the
    results of this search with observations reported in the literature, a
    near complete sample of 66 6.6-GHz class II methanol masers has been
    searched in the 95.1-GHz transition, with detections towards 38 per
    cent (25 detections; not all of the sources studied in this paper
    qualify for the complete sample, and some of the sources in the sample
    were not observed in the present observations).

Description:
    The observations were made between 1998 July 1217 using the Australia
    Telescope National Facility (ATNF) 22-m millimetre antenna at Mopra.
    The sample of 6.6-GHz methanol maser sites searched for 95.1-GHz maser
    emission was drawn from Ellingsen et al. (1996MNRAS.280..378E) and
    Ellingsen (1996, PhD thesis, Univ. Tasmania) and included all sources
    detected in the regions with Galactic longitude l=25-30°,
    282-286°, 291-296°, 325-335°.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        72       73   Class II methanol maser sites detected in the
                           95.1-GHz class I transition (26 sources)
table2.dat        55       33   Class II methanol maser sites not detected in the
                           95.1-GHz class I transition (33 sources)
table3.dat        63       86   Comparison of peak flux density and velocity range of
                           6.6-GHz class II and 95.1-GHz class I methanol masers
table4.dat        34       86   Associations of the class II methanol masers with
                           other maser species and MSX 21-um flux
table5.dat        75       86   Associations of the class II methanol masers
                           with IRAS, MSX and 2MASS point sources.


See also:
 J/A+A/432/737 : General Catalogue of 6.7GHz Methanol Masers (Pestalozzi+, 2005)
 J/AZh/72/22   : A 95 GHz Survey of Methanol Masers (Valtts+, 1995)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Name      Source name, based on galactic position
      15  A1    ----    n_Name    [a] Note on Name (G1)
  17- 18  I2    h       RAh       Right ascension (J2000)
  20- 21  I2    min     RAm       Right ascension (J2000)
  23- 28  F6.3  s       RAs       Right ascension (J2000)
      30  A1    ---     DE-       Declination sign (J2000)
  31- 32  I2    deg     DEd       Declination (J2000)
  34- 35  I2    arcmin  DEm       Declination (J2000)
  37- 41  F5.2  arcsec  DEs       Declination (J2000)
  43- 47  F5.1  Jy      Fpeak     Peak flux density at 95.1GHz (2)
  49- 51  F3.1  Jy      e_Fpeak   rms uncertainty on Fpeak (3)
  53- 58  F6.1  km/s    Vel       Velocity (2)
  60- 63  F4.2  km/s    e_Vel     rms uncertainty on Vel (3)
  65- 67  F3.1  km/s    FWHM      Full width at half maximum (2)
  69- 72  F4.2  km/s    e_FWHM    rms uncertainty on FWHM (3)

Note (2): The Hanning smoothed spectra have been fitted with one or more
           Gaussian profiles and the fitted parameters are listed.
Note (3): uncertainty reported by the fitting procedure.



Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Name      Source name, based on galactic position
      15  A1    ----    n_Name    [ab] Note on Name (G1)
  17- 18  I2    h       RAh       Right ascension (J2000)
  20- 21  I2    min     RAm       Right ascension (J2000)
  23- 28  F6.3  s       RAs       Right ascension (J2000)
      30  A1    ---     DE-       Declination sign (J2000)
  31- 32  I2    deg     DEd       Declination (J2000)
  34- 35  I2    arcmin  DEm       Declination (J2000)
  37- 41  F5.2  arcsec  DEs       Declination (J2000)
  43- 46  I4    km/s    Vell      Lower value of velocity range
  48- 51  I4    km/s    Velu      Upper value of Velocity range
  53- 55  F3.1  Jy      3sigma    3σ rms noise level as measured in the
                                   Hanning smoothed spectra


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Name      Source name, based on galactic position
      15  A1    ---     n_Name    [a] Note on Name (G1)
  17- 21  F5.1  Jy      Speak1    ? Density of peak flux for
                                     95.1-GHz class I methanol masers
  23- 27  F5.1  km/s    Vel1      ? Velocity of peak flux for
                                     95.1-GHz class I methanol masers
  29- 31  I3    km/s    Vell1     ? Velocity range of peak flux for
                                     95.1-GHz class I methanol masers
  34- 36  I3    km/s    Velu1     ? Velocity range of peak flux for
                                     95.1-GHz class I methanol masers
  38- 40  A3    ---     r_Speak1  Reference for 95.1-GHz class I methanol
                                   masers values (1)
  42- 44  I3    Jy      Speak2    Density of peak flux for
                                     6.6-GHz class I methanol masers
  46- 51  F6.1  km/s    Vel2      Velocity of peak flux for
                                     6.6-GHz class I methanol masers
  53- 56  I4    km/s    Vell2     ? Velocity range of peak flux for
                                     6.6-GHz class I methanol masers
  58- 61  I4    km/s    Velu2     ? Velocity range of peak flux for
                                     6.6-GHz class I methanol masers
      63  A1    ---     r_Speak2  Reference for 6.6-GHz class I methanol
                                   masers values (1)

Note (1): References from which the 6.6- and 95.1-GHz information was obtained
          as follows:
      * = this paper
      2 = Val'tts et al. (2000MNRAS.317..315V)
      3 = Ellingsen (1996, PhD thesis, Univ. Tasmania)
      4 = Ellingsen et al. (1996MNRAS.280..378E)
      5 = Caswell (1996MNRAS.279...79C).
      For a comprehensive list of references for each 6.6-GHz masers,
      see Pestalozzi et al. (2005, Cat. J/A+A/432/737).


Byte-by-byte Description of file: table4.dat

   Bytes Format Units     Label     Explanations

   1- 13  A13   ---       Name      Source name, based on galactic position
      15  A1    ---       n_Name    [a] Note on Name (G1)
      18  A1    ---       A1665MHz  [Y/N] Association with 1665MHz OH maser
      20  I1    ---     r_A1665MHz  Reference for 1665MHz association (1)
      22  A1    ---       A22GHz    [Y/N] Association with 22GHz H2O maser
      24  I1    ---       r_A22GHz  Reference for 22GHz association (1)
      27  A1    ---       l_FMSX    Limit flag on FMSX
  28- 34  F7.2  uW/m2/sr  FMSX      MSX 21um flux (2)

Note (1): References as follows:
      2 = Caswell & Haynes (1987AuJPh..40..215C)
      3 = Caswell (1998MNRAS.297..215C)
      4 = Caswell & Haynes (1983AuJPh..36..417C)
      5 = Caswell et al. (1995MNRAS.272...96C)
      6 = Hanslow (1997, Honours thesis, University of Tasmania)
Note (2): The MSX flux is measured directly from the images; for non-detections
          the flux density at the maser location is given as an upper limit.


Byte-by-byte Description of file: table5.dat

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Name      Source name, based on galactic position
      15  A1    ----    n_Name    [a] Note on Name (G1)
  17- 26  A10   ---     IRAS      IRAS name (Cat. II/125)
  28- 31  F4.1  arcsec  Diras     ? Distance from IRAS source
  33- 49  A17   ---     MSX       MSX name (see Cat. V/114)
  51- 54  F4.1  arcsec  Dmsx      ? Distance from MSX source
  56- 71  A16   ---     2MASS     2MASS name (see Cat. II/246)
  73- 75  F3.1  arcsec  D2mass    ? Distance from 2MASS source


Global notes:

Note (G1): Note as follows:
       a = sources not within the statistically complete sample of
           6.6-GHz methanol masers
       b = emission detected towards this source, but it appears to be 
           a sidelobe response to 29.907-0.040


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    27-Feb-2006