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J/ApJ/632/799           NGC4395 light curves                   (Peterson+, 2005)
Multiwavelength monitoring of the dwarf Seyfert 1 galaxy NGC 4395.
I. A reverberation-based measurement of the black hole mass.
    Peterson B.M., Bentz M.C., Desroches L.-B., Filippenko A.V., Ho L.C.,
    Kaspi S., Laor A., Maoz D., Moran E.C., Pogge R.W., Quillen A.C.
   <Astrophys. J., 632, 799-808 (2005)>
   =2005ApJ...632..799P
ADC_Keywords: Active gal. nuclei ; Galaxies, Seyfert ; Ultraviolet

Keywords: galaxies: active - galaxies: nuclei - galaxies: Seyfert -
          quasars: emission lines - ultraviolet: galaxies

Abstract:
    A reverberation-mapping program on NGC 4395, the least luminous known
    Seyfert 1 galaxy, undertaken with the Space Telescope Imaging
    Spectrograph on the Hubble Space Telescope yields a measurement of the
    mass of the central black hole MBH=(3.6±1.1)x105M☉. The
    observations consist of two visits of five orbits each, in 2004 April
    and July. During each of these visits, the UV continuum varied by at
    least 10% (rms), and only C IV λ1549 showed corresponding
    variations large enough to reliably determine the emission-line lag,
    which was measured to be of order 1-hr for both visits.

Description:
    We observed NGC 4395 with the HST Space Telescope Imaging Spectrograph
    (STIS) using the FUV MAMA detector with the G140L grating, which
    covers the spectral range 1150-1700Å. The first session, visit 1,
    began on 2004 April 10 03:19. The second session, visit 2, began the
    next day, on 2004 April 11 03:43. NGC 4395 was reobserved during a
    later session, visit 3, beginning on 2004 July 3 12:07. All
    observations were made through a 52"x0.5" slit at position angles
    116.5°, 119.7°, and 60.9° for visits 13, respectively.
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    12 25 48.9   +33 32 48   NGC 4395 = UGC 7524
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        37       65   Light curves for visit 2
table2.dat        37       65   Light curves for visit 3


See also:
  J/ApJS/98/477  : Optical spectral atlas of Seyfert nuclei (Ho+ 1995)
  J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)
  J/ApJS/133/77  : VLA radio continuum survey of Seyfert galaxies (Ho+, 2001)


Byte-by-byte Description of file: table1.dat table2.dat

   Bytes Format  Units       Label   Explanations

   1- 13  F13.5  d           HJD     Julian Date of observation
  15- 19  F5.3  10-16W/m2/nm F1350   1350Å flux (1)
  21- 25  F5.3  10-16W/m2/nm e_F1350  Uncertainty in F1350 (1)
  27- 31  F5.3   fW/m2       FCIV    C IV (1549Å) integrated line flux (2)
  33- 37  F5.3   fW/m2       e_FCIV  Uncertainty in FCIV (2)

Note (1): In units of 10-14erg/s/cm2/Angstroms.

Note (2): In units of 10-12erg/s/cm2.



History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    22-May-2006