J/A+A/555/A2 J-band variability of AGN (Nesci+, 2013)
Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources.
Nesci R., Tosti G., Pursimo T., Ojha R., Kadler M.
<Astron. Astrophys. 555, A2 (2013)>
=2013A&A...555A...2N 2013A&A...555A...2N
ADC_Keywords: Active gal. nuclei ; BL Lac objects ; Photometry, infrared
Keywords: BL Lacertae objects: general - radiation mechanisms: non-thermal -
gamma rays: galaxies
Abstract:
Spectral energy distribution and its variability are basic tools for
understanding the physical processes operating in active galactic
nuclei (AGN).
In this paper we report the results of a one-year near infra red (NIR)
and optical monitoring of a sample of 22 AGN known to be γ-ray
emitters, aimed at discovering correlations between optical and
γ-ray emission.
We observed our objects with the Rapid Eye Mount (REM) telescope in J,
H, K, and R bands nearly twice every month during their visibility
window and derived light curves and spectral indexes. We also analyzed
the γ-ray data from the Fermi γ-ray Space Telescope, making
weekly averages.
Description:
Photometry in J band made with REM telescope on La Silla Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 50 18 List of studied sources
photom.dat 29 136 J-band (1.2µm) photometric data
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See also:
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)
Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Source name (HHMM+DDd, B1950)
10- 11 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
13- 14 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
16- 20 F5.2 s RAs Simbad Second of Right Ascension (J2000.0)
22 A1 --- DE- Simbad Sign of the Declination (J2000.0)
23- 24 I2 deg DEd Simbad Degree of Declination (J2000.0)
26- 27 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
29- 32 F4.1 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
34- 36 A3 --- Class 2LAC classification
38- 50 A13 --- SName Simbad name
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Byte-by-byte Description of file: photom.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Source name
9- 18 F10.3 d MJD Modified Julian date of the observation
20- 24 F5.2 mag Jmag J magnitude (1)
26- 29 F4.2 mag e_Jmag rms uncertainty on Jmag
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Note (1): If more than one image was taken in a night, only the average
value is reported.
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Acknowledgements:
Roberto Nesci, Roberto.Nesci(at)iaps.inaf.it
(End) Patricia Vannier [CDS] 11-Jun-2013