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J/MNRAS/317/234     HJK photometry of 10 barred spirals  (Perez-Ramirez+, 2000)
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Circumnuclear regions in barred spiral galaxies I. Near-infrared imaging
    Perez-Ramirez D., Knapen J.H., Peletier R.F., Laine S., Doyon R., Nadeau D.
   <Mon. Not. R. Astron. Soc. 317, 234 (2000)>
   =2000MNRAS.317..234P
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ADC_Keywords: Galaxies, photometry ; Photometry, infrared
Keywords: galaxies: spiral - galaxies: starburst - galaxies: evolution -
          galaxies: structure - infrared: galaxies

Description:
    We have obtained NIR broad-band images in the J, H and K bands of 12
    barred galaxies that make up our sample, during three observing runs
    with the 3.6 m Canada-France-Hawaii Telescope on Hawaii. We used the
    Montreal NIR camera (MONICA) equipped with a 256 x 256 pixel HgCdTe
    array detector with a projected size of 0.248 arcsec.

    One of the main data products presented in this paper is a set of
    detailed radial profile fits to the NIR images. We present radial
    profiles of ellipticity, major axis position angle, NIR colour, and H-
    band surface brightness.

    We have used aperture photometry from the literature to calibrate the
    data. After calibrating the images, we fitted ellipses to the images.
    We thus produced plots of the surface brightness of the H- band as a
    function of the radius, and colour profiles in J-K and H-K for all the
    galaxies which were imaged in these bands. Error-bars in these plots
    indicate the uncertainty in the determination of the sky background.
    Certain aspects of the radial profiles are discussed in the paper, but
    there is one characteristic which is worth mentioning here. Apart from
    NGC 3516 and NGC 3982, the radial profiles show characteristic
    behaviour near the radius of the circumnuclear ring. In seven (out of
    10) galaxies, all profiles (surface brightness, colour, ellipticity
    and position angle) show either a change in slope, where the surface
    brightness profile becomes steeper, or a bump, when the colour profile
    shows a limited redder region caused by either dust or SF in or near
    the ring. These characteristics are accompanied by some change in
    ellipticity and position angle.

Objects:
    -------------------------------------------
       RA   (2000)   DE      Designation(s)
    -------------------------------------------
    00 29 18.0   +02 52 18   NGC 130
    00 34 02.3   -09 42 23   NGC 153
    00 51 18.    -73 09 00   NGC 290
    00 59 19.8   -18 14 02   NGC 335
    01 01 56.8   -06 47 44   NGC 350
    01 01 57.8   -01 56 03   NGC 351
    01 08 53.7   +32 30 52   NGC 398
    01 13 00.2   -00 15 11   NGC 430
    01 14 04.7   +33 42 13   NGC 431
    01 11 46.3   -61 31 40   NGC 432
    01 24 47.9   +09 32 21   NGC 524
    01 51 14.5   +22 34 57   NGC 695
    -------------------------------------------

File Summary:
--------------------------------------------------------------------------------
 FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe            80        .   This file
tables.dat        58      527   The photometric profiles
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Byte-by-byte Description of file: tables.dat
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   Bytes Format   Units           Label  Explanations
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   1-  8  A8      ---             NGC    Galaxy NGC (Cat. <VII/118>) designation
  10- 14  F5.2    arcsec          Rad    Major axis radius
  16- 20  F5.2   mag/arcsec+2     Hmag   H-band surface brightness profile
  22- 25  F4.2   mag/arcsec+2   e_Hmag   Error in the determination of sky
  27- 30  F4.2   mag/arcsec+2     J-K    ? J-K colour profile
  32- 35  F4.2   mag/arcsec+2   e_J-K    ? Error in the determination of sky
  37- 41  F5.2   mag/arcsec+2     H-K    ? H-K colour profile
  43- 46  F4.2   mag/arcsec+2   e_H-K    ? Error in the determination of sky
  48- 51  F4.2    ---             Ell    Ellipticity (1-b/a)
  53- 58  F6.2    deg             PA     [-90/366]? Major axis position angle
                                                     (around a mean position)
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Acknowledgements: Dolores Perez-Ramirez <dperez@star.herts.ac.uk>,
                  Johan Knapen <knapen@star.herts.ac.uk>
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(End)                                          Patricia Bauer [CDS]  03-Jul-2000