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J/ApJ/650/88        NGC4395 light curves. III.               (Desroches+, 2006)
Multiwavelength monitoring of the dwarf Seyfert 1 galaxy NGC 4395.
III. Optical variability and X-Ray/UV/Optical correlations.
    Desroches L.-B., Filippenko A.V., Kaspi S., Laor A., Maoz D.,
    Ganeshalingam M., Li W., Moran E.C., Swift B., Bentz M.C., Ho L.C.,
    Nandra K., O'Neill P.M., Peterson B.M.
   <Astrophys. J., 650, 88-101 (2006)>
   =2006ApJ...650...88D
ADC_Keywords: Active gal. nuclei; Galaxies, Seyfert; Spectroscopy

Keywords: galaxies: active - galaxies: individual (NGC 4395) -
          galaxies: nuclei - galaxies: Seyfert

Abstract:
    We present optical observations of the low-luminosity Seyfert 1
    nucleus of NGC 4395, as part of a multiwavelength
    reverberation-mapping program. Observations were carried out over two
    nights in 2004 April at Lick, Wise, and Kitt Peak Observatories. We
    obtained V- and B-band photometry, and spectra over the range
    3500-6800Å. Simultaneous Hubble Space Telescope UV and Chandra
    X-ray observations are presented in companion papers.

Description:
    Spectra were obtained on 2004 April 10 and 11 at the Lick Observatory
    3m Shane Telescope, using the Kast spectrograph.

    V-band observations were obtained on 2004 April 9-10 and 10-11, and on
    2004 July 3, with the Wise Observatory 1m telescope in Israel, using a
    back-illuminated Tektronix 1024x1024pixel CCD.

    Spectroscopic observations at the KPNO Mayall 4m telescope were
    obtained on 2004 April 10 and 11.
Objects:
    -----------------------------------------------
       RA   (2000)   DE      Designation(s)
    -----------------------------------------------
    12 25 48.9   +33 32 48   NGC 4395 = LEDA 40596
    -----------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        31      549   Broad-Band Continuum Light Curves
table3.dat        29      639   Spectroscopic Continuum Light Curves
table4.dat        39      733   Spectroscopic Emission-Line Light Curves
table6.dat        19      154   Spectroscopically Derived Broad-Band Light Curves


See also:
    J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)


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

   Bytes Format Units   Label     Explanations

   1-  6  A6    ---     Obs       Observatory (KAIT, Nickel or Wise)
       8  A1    ---     Filt      [BV] Filter used
  10- 17  F8.5  d     JD-2453105  Relative Julian date of observation (-2453105)
      19  A1    ---     Rem       [b] Data points from Wise data (1)
  21- 25  F5.3  ---     Flux      Normalized flux observed in Filt (2)
  27- 31  F5.3  ---     e_Flux    The 1σ error in Flux (2)

Note (1): 'b' indicates data points (with relative dates beginning with 85)
          referring to 2004 July 3 Wise data.
Note (2): Flux normalized so that F=1 corresponds to V=15.91mag and B=16.69mag.



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

   Bytes Format Units   Label     Explanations

   1-  4  I4    0.1nm   lambda    Continuum wavelength in Angstroms
   6-  9  A4    ---     Obs       Observatory (KPNO or Lick)
  11- 15  F5.3  d     JD-2453105  Julian date of observation (-2453105)
      17  A1    ---     Rem       [b] Suspect transit data points (1)
  19- 23  F5.3 10-17W/m2/nm FDen  Flux density (2)
  25- 29  F5.3 10-17W/m2/nm e_FDen  The 1σ error in FDen (2)

Note (1): See text for details.

Note (2): In units of 10-15erg/s/cm2/Angstrom.



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

   Bytes Format Units   Label     Explanations

   1-  7  A7    ---     Ion       Ion identification
   9- 12  I4    0.1nm   lambda    Wavelength in Angstroms
      13  A1    ---     ---       [,]
  15- 18  I4    0.1nm   lambda2   ? second value for wavelength
  20- 23  A4    ---     Obs       Observatory (KPNO or Lick)
  25- 29  F5.3  d     JD-2453105  Julian date of observation (-2453105)
  31- 34  F4.2  ---     Flux      Normalized flux (1)
  36- 39  F4.2  ---     e_Flux    The 1σ error in Flux (1)

Note (1): Flux in arbitrary units, normalized to the mean of each night.



Byte-by-byte Description of file: table6.dat

   Bytes Format Units   Label     Explanations

       1  A1    ---     Filt      [BV] Simulated filter used to derive light
                                       curve from spectra
   3-  7  F5.3  d     JD-2453105  Julian date of observation (-2453105)
       9  A1    ---     Rem       [b] Suspect transit data points. (1)
  11- 14  F4.2  ---     Flux      Normalized flux observed in Filt (2)
  16- 19  F4.2  ---     e_Flux    The 1σ error in Flux

Note (1): See text for details.

Note (2): Normalized to the mean of each night.



History:
    From electronic version of the journal

References:
    Peterson et al.,  Paper I     2005ApJ...632..799P, Cat. J/ApJ/632/799
    O'Neill et al.,   Paper II    2006ApJ...645..160O
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    21-Jul-2008