Access to Astronomical Catalogues

J/AJ/133/1947     37GHz observations of BL Lac objects       (Nieppola+, 2007)
37 GHz observations of a large sample of BL Lacertae objects.
    Nieppola E., Tornikoski M., Lahteenmaki A., Valtaoja E., Hakala T.,
    Hovatta T., Kotiranta M., Nummila S., Ojala T., Parviainen M., Ranta M.,
    Saloranta P.-M., Torniainen I., Troller M.
   <Astron. J., 133, 1947-1953 (2007)>
   =2007AJ....133.1947N
ADC_Keywords: Active gal. nuclei ; BL Lac objects ; Radio continuum

Keywords: Galaxies: active - BL Lacertae objects: general -
          Radio continuum: galaxies

Description:
    We present 37GHz data obtained at Metsahovi Radio Observatory in
    2001 December-2005 April for a large sample of BL Lacertae objects.
    Metsahovi radio telescope is a radome enclosed antenna with a
    diameter of 13.7 metres. The 37 GHz receiver is a dual horn,
    Dicke-switched receiver with a HEMT preamplifier, and is operated at
    room temperature. The observations are ON-ON observations,
    alternating the source and the sky in each feed horn. A typical
    integration time to obtain one flux density data point is
    1200-1600s, and the detection limit under optimal weather conditions
    is about 0.2Jy.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        46      398   The Metsahovi BL Lac sample
table2.dat        58     3009   37 GHz flux densities for sample sources


See also:
    J/AJ/104/28     : JHKL photometry of BL Lac Objects (Bersanelli+ 1992)
    J/A+AS/98/393   : 1Jy BL Lac Objects: Observational Data (Stickel+ 1993)
    J/A+AS/109/267  : Radio to X-Ray distrib. of BL Lac Objects (Giommi+ 1995)
    J/A+A/401/927   : The HRX-BL Lac sample (Beckmann+, 2003)
    J/AJ/129/2542   : BL Lac from SDSS (Collinge+, 2005)
 J/other/NewA/11.27  : 2MASS observation of BL Lac objects (Chen+, 2005)
 J/other/NewA/11.557 : Infrared photometry of BL Lac objects (Chen+, 2006)
    J/A+A/434/385   : High energy peaked BL Lacs X-ray/radio data (Giommi+ 2005)
    J/A+A/445/441   : SED of BL Lacertae objects (Nieppola+, 2006)


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

   Bytes Format Units   Label     Explanations

   1- 18  A18   --      Name      Source name
  20- 21  I2    h       RAh       Hour of Right ascension (J2000)
  23- 24  I2    min     RAm       Minute of Right ascension (J2000)
  26- 30  F5.2  s       RAs       Second of Right ascension (J2000)
      32  A1    --      DE-       Sign of the Declination (J2000)
  33- 34  I2    deg     DEd       Degree of Declination (J2000)
  36- 37  I2    arcmin  DEm       Arcminute of Declination (J2000)
  39- 42  F4.1  arcsec  DEs       Arcsecond of Declination (J2000)
  44- 46  A3    --      Class     Subclassification (1)

Note (1): Subclassification as follows:
    LBL = Low-energy peak BL Lac
    IBL = Intermediate BL Lac
    HBL = High-energy peak BL Lac as determined in Nieppola et al., 2006,
          Cat. J/A+A/445/441


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

   Bytes Format Units       Label     Explanations

   1- 18  A18   --          Name      Source name
  20- 29  A10  "YYYY/MM/DD" Obs.Date  Date of the observation
  31- 32  I2    h           Obs.h     UTC hour of the observation
  34- 35  I2    min         Obs.m     UTC minute of the observation
  37- 47  F11.3 d           JD        Julian date of the observation
      49  A1    --          l_Flux    [<] denotes a S/N>4 upper limit.
  50- 53  F4.2  Jy          Flux      Flux density at 37GHz
  55- 58  F4.2  Jy          e_Flux    ? Error estimate in Flux


Acknowledgements:
    Elina Nieppola, eni(at)kurp.hut.fi
(End)                                      Patricia Vannier [CDS]    29-Jun-2007