probability - Cumulative Distribution function of a Poisson ...
Sep 18, 2019 · This is because the CDF of Poisson distribution is related to that of a Gamma distribution. Hence the incomplete gamma function.
A Small, Rapid Optical-IR Response Gamma-Ray Burst Space Observatory (The NGRG)
Here we propose a new gamma-ray burst (GRB) mission, the Next Generation Rapid-Response GRB Observatory (NGRG). As with Swift, GRBs are initially located with a coded-mask X-ray camera. However, the NGRG has two new features: First, a beam-steering s...
A Search for Gamma-Ray Burst Optical Emission with the Automated Patrol Telescope
The Automated Patrol Telescope (APT) is a wide-field (5 X 5 deg.s), modified Schmidt capable of covering large gamma-ray burst (GRB) localization regions to produce a high rate of GRB optical emission measurements. Accounting for factors such as ba...
Are Radio Sources and Gamma Ray Bursts Luminal Booms?
The softening of a Gamma Ray Burst (GRB) afterglow bears remarkable similarities to the frequency evolution in a sonic boom. At the front end of the sonic boom cone, the frequency is infinite, much like a GRB. Inside the cone, the frequency rapidly...
Gamma-Ray Burst Polarimetry with the POLAR and POLAR-2 missions
Gamma-Ray Bursts are among the most powerful and violent events in the Universe. Despite over half a century of observations of these transient sources, many open questions remain about their nature and the physical emission mechanisms at play. Polar...
The Swift Gamma-Ray Burst Mission
The Swift mission, scheduled for launch in early 2004, is a multiwavelength observatory for gamma-ray burst (GRB) astronomy. It is the first-of-its-kind autonomous rapid-slewing satellite for transient astronomy and pioneers the way for future rapi...
Two Lines or Not Two Lines? That is the Question of Gamma Ray Spectra
Lines in the spectrum of cosmic gamma rays are considered one of the more robust signatures of dark matter annihilation. We consider such processes from an effective field theory vantage, and find that generically, two or more lines are expected, pro...
The June 2008 flare of Markarian 421 from optical to TeV energies
We present optical to very-high energy (VHE) gamma-ray observations of Mrk 421 between 2008 May 24 and June 23. A high-energy (HE) gamma-ray signal was detected by AGILE-GRID during June 9-15, brighter than the average flux observed by EGRET in Mrk...
The optical afterglow of the short gamma-ray burst GRB 050709
It has long been known that there are two classes of gamma-ray bursts (GRBs), mainly distinguished by their durations. The breakthrough in our understanding of long-duration GRBs (those lasting more than ~2 s), which ultimately linked them with ene...
Branching Ratios for the Three Most Intense Gamma Rays in the Decay of $^{47}$Ca
A sample of $^{47}$Ca produced through isotope harvesting at the National Superconducting Cyclotron Laboratory was used to measure branching ratios of 7.17(5)%, 7.11(5)%, and 75.0(5)% for the 489.2, 807.9, and 1297.1 keV characteristic gamma-rays, re...
gamma+gamma --> pi+pi, K+K : leading term QCD vs handbag model
The "handbag" model was proposed as an alternative, at the present day energies, to the leading term QCD predictions for some hard exclusive processes. The recent precise data from the Belle Collaboration on the large angle cross sections $γγ-->...
The observation of Delta Sct and Gamma Dor stars by using MONS satellite
The MONS space experiment will be able to verify some of the most important topics in the asteroseismologic studies of Delta Sct and Gamma Dor stars. We discuss how the $γ$ Doradus can be considered possible "bridges" between the opacity driven ov...
A Probabilistic Proof of a Wallis-type Formula for the Gamma Function
We use well-known limit theorems in probability theory to derive a Wallis-type product formula for the gamma function. Our result immediately provides a probabilistic proof of Wallis's product formula for $π$, as well as the duplication formula for...
Parameterization of the Angular Distribution of Gamma Rays Produced by p-p Interaction in…
We present the angular distribution of gamma rays produced by proton-proton interactions in parameterized formulae to facilitate calculations in astrophysical environments. The parameterization is derived from Monte Carlo simulations of the up-to-d...
PSR J1907+0602: A Radio-Faint Gamma-Ray Pulsar Powering a Bright TeV Pulsar Wind Nebula
We present multiwavelength studies of the 106.6 ms gamma-ray pulsar PSR J1907+06 near the TeV source MGRO J1908+06. Timing observations with Fermi result in a precise position determination for the pulsar of R.A. = 19h07m547(2), decl. = +06:02:16(2...
Gme Infinite gamma squeeze explained
Full disclosure, stolen from r/investing Context What happened last week with GME stock price and option was a combination of a gamma squeeze \[1\] and infinite short squeeze \[2\]. For the first ti...
Charge-state distributions of highly charged lead ions at relativistic collision energies
Presented is a study of the charge-state evolution of relativistic lead ions passing through a thin aluminum stripper foil. It was motivated by the Gamma Factory project at CERN, where optical laser pulses will be converted into intense gamma-ray bea...
The MEGA Advanced Compton Telescope Project
The goal of the Medium Energy Gamma-ray Astronomy (MEGA) telescope is to improve sensitivity at medium gamma-ray energies (0.4-50 MeV) by at least an order of magnitude over that of COMPTEL. This will be achieved with a new compact design that allo...
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Sigma Gamma Rho - Wikipedia
Sigma Gamma Rho Sorority, Inc. (ΣΓΡ) is a historically African American sorority. The sorority was founded on November 12, 1922. The organization was formed