Statistical Analysis of the Microvariable AGN Source Mrk 501

Sadun, A. C.; Asadi–Zeydabadi, Masoud; Mills, Brian; Moody, J. W.

doi:10.3390/galaxies6010020

Cited by 3 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even a small change in angle, which we are now calling Δθ, can be responsible for a measurable microburst. Let us compare our results using the aforementioned jet model on BL Lac, to the results of using the same model as applied to a very different object, Mrk 501 [11]. The objects are quite different (one is a BL Lac object while the other is an optical galaxy); they also have very different light curves.…”

Section: Resultsmentioning

confidence: 99%

“…This would validate, at least to some degree, the hypothesis that the cause of the underlying variability for each object is the same, namely Doppler boosting of jets and beams directed close to the line of sight. Let us compare our results using the aforementioned jet model on BL Lac, to the results of using the same model as applied to a very different object, Mrk 501 [11]. The objects are quite different (one is a BL Lac object while the other is an optical galaxy); they also have very different light curves.…”

Section: Resultsmentioning

confidence: 99%

“…We follow along the lines of the detailed calculations of jet dynamics that have been previously applied to Mrk 501 [11], but now as applied to the high cadence, microvariability part of the model for BL Lac. The geometry of this model is depicted in Figure 3 as shown below.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

The Microvariable Activity of BL Lacertae

et al. 2020

Self Cite

View full text Add to dashboard Cite

We report on seven nights of optical observation taken over a two-week period, and the resultant analysis of the intermediate-frequency peaked BL Lac object (IBL), BL Lac itself, at redshift z = 0.069. The microvariable behavior can be confirmed over the course of minutes for each night. A relativistic beaming model was used in our analysis, to infer changes to the line of sight angles for the motion of the different relativistic components. This model has very few free parameters. The light curves we generated show both high and moderate frequency cadence to the variable behavior of BL Lac itself, in addition to the well documented long-term variability.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The Microvariable Activity of BL Lacertae

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this work, we apply local cross-correlation functions (LCCFs [28]) to investigate possible correlations between ATLAS optical data and gamma-ray observations with the Fermi-LAT for a sample of 18 TeV-detected northern blazars, over 8 years of observations between 2015 and 2022. For brighter sources (for example, Mrk 501 [29]), it is also possible to undertake an analysis of microvariability in outbursts using optical data and this will be investigated in detail in a future publication.…”

Section: Introductionmentioning

confidence: 99%

Investigating Possible Correlations between Gamma-Ray and Optical Lightcurves for TeV-Detected Northern Blazars over 8 Years of Observations

Acharyya

Sadun

2023

Galaxies

View full text Add to dashboard Cite

Blazars are a subclass of active galactic nuclei (AGN) having relativistic jets aligned within a few degrees of our line-of-sight and form the majority of the AGN detected in the TeV regime. The Fermi-Large Area Telescope (LAT) is a pair-conversion telescope, sensitive to photons having energies between 20 MeV and 2 TeV, and is capable of scanning the entire gamma-ray sky every three hours. Despite the remarkable success of the Fermi mission, many questions still remain unanswered, such as the site of gamma-ray production and the emission mechanisms involved. The Asteroid Terrestrial-impact Last Alert System (ATLAS) is a high cadence all sky survey system optimized to be efficient for finding potentially dangerous asteroids, as well as in tracking and searching for highly variable and transient sources, such as AGN. In this study, we investigate possible correlations between the Fermi-LAT observations in the 100 MeV–300 GeV energy band and the ATLAS optical data in the R-band, centered at 679 nm, for a sample of 18 TeV-detected northern blazars over 8 years of observations between 2015 and 2022. Under the assumption that the optical and gamma-ray flares are produced by the same outburst propagating down the jet, the strong correlations found for some sources suggest a single-zone leptonic model of emission.

show abstract

“…In this work, we apply local cross-correlation functions (LCCFs, [28]) to investigate possible correlations between ATLAS optical data and gamma-ray observations with the Fermi-LAT for a sample of 18 TeV-detected northern blazars, over 8 years of observations between 2015-2022. For brighter sources (for example Mrk 501 [29]), it is also possible to undertake an analysis of microvariability in outbursts using optical data and this will be investigated in detail in a future publication.…”

Section: Introductionmentioning

confidence: 99%

Investigating Possible Correlations Between Gamma-Ray and Optical Lightcurves for TeV-Detected Northern Blazars Over 8 Years of Observations

Acharyya¹,

Sadun²

2023

Preprint

View full text Add to dashboard Cite

Blazars are a subclass of Active Galactic Nuclei (AGN) having relativistic jets aligned within a few degrees of our line-of-sight and form the majority of the AGN detected in the TeV regime. The Fermi-Large Area Telescope (LAT) is a pair-conversion telescope, sensitive to photons having energies between 20 MeV-2 TeV, and is capable of scanning the entire gamma-ray sky every three hours. Despite the remarkable success of the Fermi mission, many questions still remain unanswered, such as the site of gamma-ray production and the emission mechanisms involved. The Asteroid Terrestrial-impact Last Alert System (ATLAS) is a high cadence all sky survey system optimized to be efficient for finding potentially dangerous asteroids, as well as in tracking and searching for highly variable and transient sources, such as AGN. In this study, we investigate possible correlations between the \textit{Fermi}-LAT observations in the 100 MeV-300 GeV energy band and the ATLAS optical data in the R-band, centered at 679 nm, for a sample of 18 TeV-detected northern blazars over 8 years of observations between 2015-2022. Under the assumption that the optical and gamma-ray flares are produced by the same outburst propagating down the jet, the strong correlations found for some sources suggest a single-zone leptonic model of emission.

show abstract

Statistical Analysis of the Microvariable AGN Source Mrk 501

Cited by 3 publications

References 17 publications

The Microvariable Activity of BL Lacertae

The Microvariable Activity of BL Lacertae

Investigating Possible Correlations between Gamma-Ray and Optical Lightcurves for TeV-Detected Northern Blazars over 8 Years of Observations

Investigating Possible Correlations Between Gamma-Ray and Optical Lightcurves for TeV-Detected Northern Blazars Over 8 Years of Observations

Contact Info

Product

Resources

About