J/A+A/576/A122 3C 273 high energy spectrum (Esposito+, 2015)
The high energy spectrum of 3C 273.
Esposito V., Walter R., Jean P., Tramacere A., Turler M., Lahteenmaki A.,
Tornikoski M.
<Astron. Astrophys. 576, A122 (2015)>
=2015A&A...576A.122E 2015A&A...576A.122E
ADC_Keywords: QSOs ; Galaxies, spectra
Keywords: galaxies: active - galaxies: nuclei - quasars: individual: 3C 273 -
X-rays: galaxies - gamma rays: galaxies
Abstract:
The high energy spectrum of 3C 273 is usually understood in terms of
inverse-Compton emission in a relativistic leptonic jet. This model
predicts variability patterns and delays that could be tested with
simultaneous observations from the radio to the GeV range.
The instruments IBIS, SPI, JEM-X on board INTEGRAL, PCA on board RXTE,
and LAT on board Fermi have enough sensitivity to follow the spectral
variability of 3C 273 from the keV to the GeV. We looked for
correlations between the different energy bands, including radio data
at 37GHz collected at the Metsahovi Radio Observatory and built
quasi-simultaneous multiwavelength spectra in the high energy domain
when the source is flaring either in the X-rays or in the γ
rays.
Description:
Broad band Spectral Energy Density (SED) of 3C 273 combining the data
from RXTE-PCA, INTEGRAL-JEMX, INTEGRAL-ISGRI, INTEGRAL-SPI and
Fermi-LAT.
Each file contains three columns: photon energy, energy flux and the
estimated error.
Objects:
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RA (2000) DE Designation(s)
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12 29 06.70 +02 03 08.7 3C 273 = 3C 273.0
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
latspect.dat 32 47 SED at LAT flaring time (blue points in Fig. 7)
pcaspect.dat 32 41 SED at PCA flaring time (yellow points in Fig. 7)
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See also:
J/MNRAS/392/1181 : BV(RI)c photometry of 3C 273 (Dai+, 2009)
J/ApJS/213/26 : Optical light curves of PHL1811 and 3C273 (Fan+, 2014)
Byte-by-byte Description of file: latspect.dat pcaspect.dat
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Bytes Format Units Label Explanations
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1- 10 E10.4 keV E [4.4/596690] Energy (4keV to 0.6GeV)
12- 21 E10.4 W/m2 Flux Flux at E
23- 32 E10.4 W/m2 e_Flux Flux Error
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Acknowledgements:
Valentino Esposito, Valentino.Esposito(at)unige.ch
(End) Valentino Esposito [ISDC, Switzerland], Patricia Vannier [CDS] 21-Apr-2015