Search for Non-Triggered Gamma Ray Bursts in the BATSE Continuous Records: Preliminary Results

Abstract

We present preliminary results of an off-line search for non-triggered gamma-ray bursts (GRBs) in the BATSE daily records for about 5.7 years of observations. We found more GRB-like events than the yield of the similar search of Kommers et al. (1998) and extended the Log N - log P distribution down to $\sim$ 0.1 ph cm${}^{-2}$ s${}^{-1}$. The indication of a turnover of the log N - log P at a small P is not confirmed: the distribution is straight at 1.5 decades with the power law index -.6 and cannot be fitted with a standard candle cosmological model.

4 pages, LaTeX, to appear in Proceedings "Gamma Ray Bursts in the Afterglow Era", Rome, November 1998, A&AS, 1999

References in corpus (6)

• The Evolution of the Global Star Formation History as Measured from the Hubble Deep Field
• Inferring the Spatial and Energy Distribution of Gamma Ray Burst Sources. II. Isotropic Models
• A Complexity-Brightness Correlation in Gamma Ray Bursts
• A Search for Non-triggered Gamma Ray Bursts in the BATSE Data Base
• Gamma-Ray Bursts Detected From BATSE DISCLA Data
• Brightness Dependent Properties of Gamma Ray Bursts

Cited by in corpus (14)

• On the Association of Gamma-ray Bursts with Massive Stars: Implications for Number Counts and Lensing Statistics
• Outliers to the Isotropic Energy - Peak Energy Relation in GRBs
• The redshift distribution of SWIFT Gamma-Ray Bursts: evidence for evolution
• Evidence for Luminosity Evolution of Long Gamma-ray Bursts in Swift Data
• An Off-line Scan of the BATSE Daily Records and a Large Uniform Sample of Gamma-Ray Bursts
• Shadow and Photon Sphere of Black Hole in Clouds of Strings and Quintessence
• Gamma Ray Bursts from the First Stars: Neutrino Signals
• "Orphan" afterglows in the Universal Structured Jet Model for gamma-ray bursts
• Evidence for a Fast Decline in the Progenitor Population of Gamma Ray Bursts and the Nature of their Origin
• The Decline of the Source Population of Gamma-Ray Bursts and Their Luminosity Function
• Bizarre Hard X-ray Outbursts of Cygnus X-1
• Superlong GRBs
• The GRB luminosity function in the internal shock model confronted to observations
• The Luminosity Function of Long Gamma-Ray Bursts and their rate at z>6