J/A+A/587/A1 11.5um image of NGC 835 (Gonzalez-Martin+, 2016)
X-ray long-term variations in the low-luminosity AGN NGC835 and its
circumnuclear emission.
Gonzalez-Martin O., Hernandez-Garcia L., Masegosa J., Marquez I.,
Rodriguez-Espinosa J.M., Acosta-Pulido J.A., Alonso-Herrero A., Dultzin D.,
Espaza Arredondo D.
<Astron. Astrophys. 587, A1 (2016)>
=2016A&A...587A...1G 2016A&A...587A...1G (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, IR
Keywords: galaxies: active - galaxies: nuclei - infrared: galaxies -
X-ray: galaxies
Abstract:
Obscured active galactic nuclei (AGNs) are thought to be very common
in the Universe. Observations and surveys have shown that the number
of sources increases for near galaxies and at the low-luminosity
regime (the so-called LLAGNs). Furthermore, many AGNs show changes in
their obscuration properties at X-rays that may suggest a
configuration of clouds very close to the accretion disk. However,
these variations could also be due to changes in the intrinsic
continuum of the source. It is therefore important to study nearby AGN
to better understand the locus and distribution of clouds in the
neighbourhood of the nucleus.
We aim to study the nuclear obscuration of LLAGN NGC 835 and its
extended emission using mid-infrared observations.
We present sub-arcsecond-resolution mid-infrared 11.5um imaging of the
LLAGN galaxy NGC 835 obtained with the instrument CanariCam in the
Gran Telescopio CANARIAS (GTC), archival Spitzer/IRS spectroscopy,
and archival Chandra data observed in 2000, 2008, and 2013.
Description:
We present the first sub-arcsecond resolution mid-infrared imaging
of NGC 835. This nucleus was observed with Canari-cam/GTC on 23
September 2014. Images were taken using the Si5 filter (at 11.5um with
an effective width of 0.9um) in two separate observing blocks with a
total on-source time of 993s.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
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02 09 24.59 -10 08 09.1 NGC 835 = Mrk 1021
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 117 1 Informations on fits image
fits/* . 1 Fits image
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Byte-by-byte Description of file:list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 25 F6.4 arcsec/pix scale Scale of the image
27- 29 I3 --- Nx Number of pixels along X-axis
31- 33 I3 --- Ny Number of pixels along Y-axis
35- 44 A10 "date" Date Observation date
46- 48 I3 Kibyte size Size of FITS file
50- 90 A41 --- FileName Name of FITS file, in subdirectory fits
92-117 A26 --- Title Title of the FITS file
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Acknowledgements:
Omaira Gonzalez-Martin, o.gonzalez(at)crya.unam.mx
(End) Patricia Vannier [CDS] 08-Dec-2015