ADC/CDS Standard Document for Catalog:
/journal_tables/AZh/71/200/

1. Use the ADC Data Viewer Suite to visualize the data.
2. Get the data files via anonymous FTP. (See Note.)

J/AZh/71/200     Spectral Investigation of NGC 7469      (Doroshenko+, 1994)
================================================================================
Spectral Investigation of NGC 7469 Using Image-Tube Observations
from 1972-1990.
     Doroshenko V.T., Sergeev S. G., Chuvaev K. K.
    <Astron. Zh. 71, 200 (1994)>
    =1994AZh....71..200D
================================================================================
ADC_Keywords: Galaxies, spectra; Balmer lines

Abstract:
    This investigation is mainly related to hydrogen lines in the spectrum
    of NGC 7469 from the 1972-1990 data obtained using an image tube on
    the 2.6-m telescope of the Crimean Astrophysical Observatory. The
    decomposition of the hydrogen lines into broad and narrow components
    was performed. Variations in the intensities and broad-component
    contours were observed. One third of the spectrograms showed a broad,
    symmetric Ha line, while the others showed asymmetry: the blue wings
    fall more steeply than the red ones. The degree of asymmetry is
    variable, but no correlation between it and the brightness of the
    nucleus was found. This asymmetry becomes weaker when passing to
    higher members of the Balmer series. The halfwidths of the broad
    components increase from Ha to H{gamma}. Redshifts of broad components
    with respect to narrow ones might also be larger for higher members of
    the Balmer series. Intensities of the broad hydrogen lines follow
    continuum variations with a delay of about 28 days. The Balmer
    decrement for broad lines is much flatter than for narrow ones.

Objects:
    ----------------------------------------------------------
       RA   (2000)   DE    Designation(s)
    ----------------------------------------------------------
    23 03 15.3 +08 52 25   NGC 7469
    ----------------------------------------------------------

File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
table              73      154   Equivalent widths of the emission lines
                                 in NGC 7469
--------------------------------------------------------------------------------

Byte-by-byte Description of file: table
--------------------------------------------------------------------------------
   Bytes Format     Units   Label      Explanations
--------------------------------------------------------------------------------
   1-  8  A8     "DD/MM/YY" Date       Observation date
  11- 16  F6.2      0.1nm   H(alpha)b  ?Equivalent width of H(alpha) broad line
  18- 22  F5.1      0.1nm   H(alpha)n  ?Equivalent width of H(alpha) narrow line
  25- 29  F5.2      0.1nm   [NII]6548  ?Equivalent width of [NII] 6548 A
  32- 35  F4.1      0.1nm   [NII]6583  ?Equivalent width of [NII] 6583 A
  38- 42  F5.1      0.1nm   H(beta)b   ?Equivalent width of H(beta) broad line
  45- 49  F5.2      0.1nm   H(beta)n   ?Equivalent width of H(beta) narrow line
  52- 56  F5.2      0.1nm  [OIII]4959  ?Equivalent width of [OIII] 4959 A
  59- 62  F4.1      0.1nm  [OIII]5007  ?Equivalent width of [OIII] 5007 A
  65- 68  F4.1      0.1nm   H(gamma)b  ?Equivalent width of H(gamma) broad line
  71- 73  F3.1      0.1nm   H(gamma)n  ?Equivalent width of H(gamma) narrow line
--------------------------------------------------------------------------------
================================================================================
(End)                                   Veta Avedisova [INASAN]      30-Dec-1996