A TIME-RESOLVED STUDY OF THE BROAD-LINE REGION IN BLAZAR 3C 454.3

@article{Isler2013ATS,
  title={A TIME-RESOLVED STUDY OF THE BROAD-LINE REGION IN BLAZAR 3C 454.3},
  author={Jedidah C. Isler and C. Megan Urry and Paolo S. Coppi and Charles D. Bailyn and Ritaban Chatterjee and Giovanni Fossati and Erin Wells Bonning and Laura Maraschi and Michelle M. Buxton},
  journal={The Astrophysical Journal},
  year={2013},
  volume={779}
}
We present multi-epoch optical observations of the blazar 3C 454.3 (z = 0.859) from 2008 August through 2011 December, using the Small and Medium Aperture Research Telescope System Consortium 1.5 m + RCSpectrograph and 1.3 m + ANDICAM in Cerro Tololo, Chile. The spectra reveal that the broad emission lines Mg ii, Hβ, and Hγ are far less variable than the optical or γ-ray continuum. Although the γ-rays varied by a factor of 100 above the EGRET era flux, the lines generally vary by a factor of… 

Figures and Tables from this paper

Long-term optical spectroscopic variations in blazar 3C 454.3
Aims. Characterisation of the long-term variations in the broad line region in a luminous blazar, where Comptonisation of broad-line emission within a relativistic jet is the standard scenario for
Flare-like Variability of the Mg II λ2800 Emission Line in the Γ-Ray Blazar 3C 454.3
We report the detection of a statistically significant flare-like event in the Mg ii λ2800 emission line of 3C 454.3 during the outburst of autumn 2010. The highest levels of emission line flux
Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011
We present our photometric monitoring of a flat spectrum radio quasar 3C 454.3 at Yunnan observatories from 2006 to 2011. We find that the optical color of 3C 454.3 shows an obvious
THE BLOB CRASHES INTO THE MIRROR: MODELING THE EXCEPTIONAL γ-RAY FLARING ACTIVITY OF 3C 454.3 IN 2010 NOVEMBER
3C 454.3 is a prominent flat-spectrum radio quasar that in recent years attracted considerable attention because of its variable high-energy emissions. In this paper, we focus on the exceptional
Temporal correlation between the optical and γ-ray flux variations in the blazar 3C 454.3
Blazars show optical and γ-ray flux variations that are generally correlated, although there are exceptions. Here we present anomalous behaviour seen in the blazar 3C 454.3 based on an analysis of
The Changing-look Blazar B2 1420+32
Blazars are active galactic nuclei with their relativistic jets pointing toward the observer, comprising two major subclasses, flat-spectrum radio quasars (FSRQs) and BL Lac objects. We present
MULTI-EPOCH OBSERVATIONS OF THE RED WING EXCESS IN THE SPECTRUM OF 3C 279
It has been previously determined that there is a highly significant correlation between the spectral index from 10 GHz to 1350 Å and the amount of excess luminosity in the red wing of quasar C iv
On the Location of the 2009 GeV Flares of Blazar PKS 1510–089
Most of the radiated power of blazars is produced at GeV energies via inverse Compton scattering at an unknown distance from the central engine. Possible seed photon sources map to different
Multiwavelength Analysis and the Difference in the Behavior of the Spectral Features during the 2010 and 2014 Flaring Periods of the Blazar 3C 454.3
Over the years, the flat-spectrum radio quasar 3C 454.3 has presented phases of very high activity (flares) in which the different wave bands increase their flux dramatically. In this work, we
EXPLORING THE BLAZAR ZONE IN HIGH-ENERGY FLARES OF FSRQs
The gamma-ray emission offers a powerful diagnostic tool to probe jets and their surroundings in flat-spectrum radio quasars (FSRQs). In particular, sources emitting at high energies (>10 GeV) give
...
...

References

SHOWING 1-10 OF 65 REFERENCES
MULTIWAVELENGTH VARIATIONS OF 3C 454.3 DURING THE 2010 NOVEMBER TO 2011 JANUARY OUTBURST
We present multiwavelength data of the blazar 3C 454.3 obtained during an extremely bright outburst from 2010 November through 2011 January. These include flux density measurements with the Herschel
WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase Detection of the little
Context. The quasar-type blazar 3C 454.3 was observed to undergo an unprecedented optical outburst in spring 2005, affecting the source brightness from the near-IR to the X-ray frequencies. This was
The γ-ray brightest days of the blazar 3C 454.3
In the first week of 2009 December, the blazar 3C 454.3 became the brightest high-energy source in the sky. Its photon flux reached and surpassed the level of 10 −5 ph cm −2 s −1 above 100 MeV. The
CORRELATED VARIABILITY IN THE BLAZAR 3C 454.3
The blazar 3C 454.3 was revealed by the Fermi Gamma-ray Space Telescope to be in an exceptionally high flux state in 2008 July. Accordingly, we performed a multiwavelength monitoring campaign from
Monitoring Lyα Emission from the Blazar 3C 279
The blazar 3C 279 is well studied and shows frequent large continuum flares from radio to γ-ray wavelengths. There have been a number of multiwavelength observations of 3C 279, and hence there are
The radio delay of the exceptional 3C 454.3 outburst - Follow-up WEBT observations in 2005–2006
Context. In spring 2005 the blazar 3C 454.3 was observed in an unprecedented bright state from the near-IR to the hard X-ray frequencies. A mm outburst peaked in June-July 2005, and it was followed
FLARING BEHAVIOR OF THE QUASAR 3C 454.3 ACROSS THE ELECTROMAGNETIC SPECTRUM
We analyze the behavior of the parsec-scale jet of the quasar 3C 454.3 during pronounced flaring in 2005–2008. Three major disturbances propagated down the jet along different trajectories with
THE BRIGHTEST GAMMA-RAY FLARING BLAZAR IN THE SKY: AGILE AND MULTI-WAVELENGTH OBSERVATIONS OF 3C 454.3 DURING 2010 NOVEMBER
Since 2005, the blazar 3C 454.3 has shown remarkable flaring activity at all frequencies, and during the last four years it has exhibited more than one γ-ray flare per year, becoming the most active
AGILE detection of a rapid γ-ray flare from the blazar PKS 1510-089 during the GASP-WEBT monitoring
Aims. We report the detection by the AGILE satellite of a rapid γ-ray flare from the source 1AGL J1511−0908, associated with the powerful γ-ray quasar PKS 1510−089, during a pointing centered on the
Coordinated Fermi/Optical Monitoring of Blazars and the Great 2009 September Gamma-ray Flare of 3C 454.3
We describe the optical spectropolarimetric monitoring program at Steward Observatory centered around gamma-ray-bright blazars and the LAT Monitored Source List planned for Fermi Cycles 2-4. The
...
...