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 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)
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12 25 48.9 +33 32 48 NGC 4395 = LEDA 40596
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File Summary:
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FileName Lrecl Records Explanations
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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
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See also:
J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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)
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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.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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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)
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Note (1): See text for details.
Note (2): In units of 10-15erg/s/cm2/Angstrom.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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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)
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Note (1): Flux in arbitrary units, normalized to the mean of each night.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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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
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Note (1): See text for details.
Note (2): Normalized to the mean of each night.
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History:
From electronic version of the journal
References:
Peterson et al., Paper I 2005ApJ...632..799P 2005ApJ...632..799P, Cat. J/ApJ/632/799
O'Neill et al., Paper II 2006ApJ...645..160O 2006ApJ...645..160O
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 21-Jul-2008