J/A+A/672/A132 MCG 08-11-011 narrowband light curves (Fian+, 2023)
Continuum reverberation mapping of MCG 08-11-011.
Fian C., Chelouche D., Kaspi S., Sobrino Figaredo C., Lewis T., Catalan S.
<Astron. Astrophys. 672, A132 (2023)>
=2023A&A...672A.132F 2023A&A...672A.132F (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Photometry, narrow-band ; Optical ; Infrared
Keywords: accretion, accretion disks - galaxies: active - galaxies: Seyfert -
galaxies: photometry - galaxies: individual: MCG 08-11-011 -
galaxies: nuclei
Abstract:
We report the results from a photometric reverberation mapping
campaign carried out with the C18 telescope at the Wise Observatory
from 2019 to 2020, targeting the active galactic nucleus MCG
08-11-011. The monitoring was conducted on a daily basis with
specially designed narrowband filters, spanning from optical to
near-infrared wavelengths (∼4000 to 8000Å) and avoiding prominent
broad emission lines. We aim to measure inter-band continuum time
lags, determine the size-wavelength relation, and estimate the
host-subtracted AGN luminosity for this system. We use the
point-spread function (PSF) photometry to extract the continuum light
curves and measure the inter-band time lags using several methods,
including the interpolated cross-correlation function, the
z-transformed discrete correlation function, a von Neumann estimator,
JAVELIN (in spectroscopic and photometric mode), MICA, and a
multivariate correlation function. We find wavelength-dependent lags,
τ(λ), up to ∼7 days between the multiband light curves of
MCG 08-11-011. The observed lags are larger than predictions based on
standard thin-disk theory by a factor of ∼3-7. We discern a
significantly steeper size-wavelength relation than expected for a
geometrically thin and optically thick accretion disk, which may
result from the contribution of diffuse continuum emission to the
flux. These results are similar to those found by previous continuum
reverberation mapping campaigns.
Description:
We conducted an optical RM monitoring campaign with homogeneous and
high-cadence (about ∼1 day) observations lasting for six months from
October 2019 to April 2020, using the C18 telescope of the WISE
Observatory in Israel. Through a redshift of z=0.0205, the emission
line free continuum bands at 4250, 5700, 6200, 7320, and 8025Å
mainly trace the AGN continuum variations. Tables 1-5 contain the PSF
photometry light curves of the Seyfert-1 galaxy MCG 08-11-011.
Objects:
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RA (2000) DE Designation(s)
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05 54 53.60 +46 26 21.6 MCG 08-11-011 = UGC 3374
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 92 MCG 08-11-011 normalized NB4250 light curve
table2.dat 74 90 MCG 08-11-011 normalized NB5700 light curve
table3.dat 74 88 MCG 08-11-011 normalized NB6200 light curve
table4.dat 74 91 MCG 08-11-011 normalized NB7320 light curve
table5.dat 74 90 MCG 08-11-011 normalized NB8025 light curve
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Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 24 E24.19 d MJD Modified Julian Date
26- 49 E24.19 --- Flux Flux (in arbitrary units)
51- 74 E24.19 --- e_Flux Error in flux (in arbitrary units)
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Acknowledgements:
Carina Fian, carina.fian(at)uv.es
(End) Carina Fian [Universidad de Valencia], Patricia Vannier [CDS] 04-Feb-2023