727 citations · 2.6k across the 46 of their papers we have counts for
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X-Ray Spectral Variability Signatures of Flares in BL Lac Objects
M. Boettcher, J. Chiang
We are presenting a detailed parameter study of the time-dependent electron injection and kinematics and the self-consistent radiation transport in jets of intermediate and low-fre…
Predictions of the High-Energy Emission from BL Lac objects: The Case of W Comae
M. Boettcher, R. Mukherjee, A. Reimer
Spectral fitting of the radio through hard X-ray emission of BL Lac objects has previously been used to predict their level of high-energy (GeV - TeV) emission. In this paper, we p…
Transient Absorption Features in GRBs and Their Implications for GRB Progenitors
M. Boettcher, C. L. Fryer, C. D. Dermer
The recent detection of a transient absorption feature in the prompt emission of GRB 990705 has sparked multiple attempts to fit this feature in terms of photoelectric absorption o…
Radiation from collision-dominated relativistic pair fireballs
M. Boettcher, R. Schlickeiser, A. Marra
It is generally accepted that gamma-ray bursts (GRBs) are initiated by a relativistic pair fireball, converting its internal energy into kinetic energy of a relativistically moving…
An evolutionary scenario for blazar unification
M. Boettcher, C. D. Dermer
Blazar subclasses ranging from flat-spectrum radio quasars (FSRQs) through low-frequency-peaked BL Lac objects (LBLs) to high-frequency-peaked BL Lac objects (HBLs) exhibit a seque…
Day-Scale Variability of 3C 279 and Searches for Correlations in Gamma-Ray, X-Ray, and Optical Bands
R. C. Hartman, M. Villata, T. J. Balonek +36
Light curves of 3C 279 are presented in optical (R-band), X-rays (RXTE/PCA), and gamma rays (CGRO/EGRET) for 1999 Jan-Feb and 2000 Jan-Mar. During both of those epochs the gamma-ra…
An analytic function fit to Monte-Carlo X- and gamma-ray spectra from Thomson thick thermal/nonthermal hybrid plasmas
M. Boettcher, R. Saxena, A. W. Crider
We suggest a simple fitting formula to represent Comptonized X- and gamma-ray spectra from a hot ( keV), Thomson thick () hybrid thermal/nonthermal…
Flash-Heating of Circumstellar Clouds by Gamma Ray Bursts
Charles D. Dermer, Markus Boettcher
The blast-wave model for gamma-ray bursts (GRBs) has been called into question by observations of spectra from GRBs that are harder than can be produced through optically thin sync…
Multiwavelength observations of Mkn 501 during the 1997 high state
D. Petry, M. Boettcher, V. Connaughton +10
During the observation period 1997, the nearby Blazar Mkn 501 showed extremely strong emission and high variability. We examine multiwavelength aspects of this event using radio, o…
Line emission from gamma-ray burst environments
M. Boettcher
The time and angle dependent line and continuum emission from a dense torus around a cosmological gamma-ray burst source is simulated, taking into account photoionization, collisio…
The Energy Dependence of the Aperiodic Variability for Cygnus X-1, GX 339-4, GRS 1758-258, & 1E 1740.7-2942
D. Lin, I. A. Smith, M. Bottcher +1
Using the data from the Rossi X-ray Timing Explorer (RXTE), we report the different energy dependence of the variability of the four persistent hard X-ray sources in the low-hard s…
Spectral Energy Distributions of Gamma Ray Bursts Energized by External Shocks
C. D. Dermer, M. Boettcher, J. Chiang
Sari, Piran, and Narayan have derived analytic formulas to model the spectra from gamma-ray burst blast waves that are energized by sweeping up material from the surrounding medium…
Leptonic Jet Models of Blazars: Broadband Spectra and Spectral Variability
M. Boettcher
The current status of leptonic jet models for gamma-ray blazars is reviewed. Differences between the quasar and BL-Lac subclasses of blazars may be understood in terms of the domin…
Early GRB Afterglows from Relativistic Blast Waves in General Radiative Regimes
M. Boettcher, C. D. Dermer
We present simple analytical expressions for the predicted spectral and temporal behavior of the early afterglow radiation from gamma-ray bursts in radiative regimes intermediate b…
The External Shock Model of Gamma-Ray Bursts: Three Predictions and a Paradox Resolved
Charles D. Dermer, Markus Boettcher, J. Chiang
In the external shock model, gamma-ray burst (GRB) emissions are produced by the energization and deceleration of a thin relativistic blast wave due to its interactions with the ci…
The synchrotron peak shift during high-energy flares of blazars
M. Boettcher
A prediction for the energy shift of the synchrotron spectrum of flat-spectrum radio quasars (FSRQs) during high-energy flares is presented. If the -ray emission of FSRQs is pro…
Prompt and Delayed High-Energy Emission from Cosmological Gamma-Ray Bursts
M. Boettcher, C. D. Dermer
In the cosmological blast-wave model for gamma ray bursts (GRBs), high energy (> 10 GeV) gamma-rays are produced either through Compton scattering of soft photons by ultrarelativis…
A New Approach to Statistics of Cosmological Gamma-Ray Bursts
M. Boettcher, C. D. Dermer
We use a new method of analysis to determine parameters of cosmological gamma-ray bursts (GRBs), assuming that their distribution follows the star-formation history of the universe…
A New Model for the Hard Time Lags in Black Hole X-Ray Binaries
M. Boettcher, E. P. Liang
The time-dependent Comptonized output of a cool soft X-ray source drifting inward through an inhomogeneous hot inner disk or corona is numerically simulated. We propose that this s…
Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst
M. Boettcher, S. D. Bloom
The multiwavelength spectrum of BL Lacertae during its July 1997 outburst is analyzed in terms of different variations of the homogeneous leptonic jet model for the production of h…
On Compton Scattering Scenarios for Blazar Flares
M. Boettcher, C. D. Dermer
The synchrotron reflection scenario recently proposed to explain -ray flares observed from blazar jets is studied. Our analysis takes into account the angular distribution of th…
Fireballs Loading and the Blast Wave Model of Gamma Ray Bursts
C. D. Dermer, J. Chiang, M. Boettcher
A simple function for the spectral power is proposed to model, with 9 parameters, the spectral and temporal evolution of the observed nonthermal synchrotron…
Comptonization signatures in the rapid aperiodic variability of Galactic black-hole candidates
M. Boettcher, E. P. Liang
We investigate the effect of inverse-Compton scattering of flares of soft radiation in different geometries of a hot, Comptonizing region and a colder accretion disk around a solar…
Transrelativistic pair plasmas in AGN jets
M. Boettcher, M. Pohl, R. Schlickeiser
Models of relativistic jets filled with ultrarelativistic pair plasma are very successful in explaining the broadband radiation of -ray blazars. Assuming that the initial inject…