A search for UHE cosmic ray from the Crab pulsar/nebula. [PSR 0531+21]

Conference · Fri Apr 05 00:00:00 EST 1991 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5597155

Alexandreas, D E ^[1]; Berley, D; Biller, S D; Burman, R L; Cady, D R; Chang, C Y; Dingus, B L; Dion, C; Dion, G M; Ellsworth, E W; Goodman, J A; Haines, T J; Hoffman, C M; Krakauer, D A; Kwok, P W; Lloyd-Evans, J; Lu, X; Nagle, D A; Potter, M E; Sandberg, V D ; Stark, M J; Vishwanath, P R; Yodh, G B; Zhang, W P ^[2]; G Dion, Presented by

---

1. The University of California, Irvine, California 92717 (USA)
2. The University of California, Irvine, California 92717 (USA) The University of Maryland, College Park, Maryland 20742-4111 (USA) Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA) The University of Notre Dame, Notre Dame, Indiana 46556 (USA) George Mason University, Fairfax, Virginia 22030-4444 (USA) Argonne National Laboratory, Argonne, Illinois 60439-4843 (USA)

A preliminary search is made for continuously pulsed, and burst, emission from the Crab pulsar or its nebula at ultra-high energies using the CYGNUS air shower experiment. No evidence is found for pulsed emission over the entire data set of 1,075 days searched. A 90% confidence upper limit for the flux of cosmic rays at the interpulse phase is 6.9{times}10{sup {minus}14} cm{sup {minus}2}s{sup {minus}1} above 50 TeV. A single day (JD=2447644.5,UTC=66700{ital s} to JD=2447645.5,UTC=11200{ital s}), is found to have a 4.1 {sigma} excess corresponding to a chance probability of 2.2%; no evidence of the pulsar period is found on this day.

• OSTI ID: 5597155
• Report Number(s): CONF-9010289-; CODEN: APCPC; TRN: 91-019998
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 220:1; Conference: International conference on high energy gamma ray astronomy, Ann Arbor, MI (United States), 2-5 Oct 1990; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRAB NEBULA
COSMIC RAY FLUX
GAMMA RADIATION
PULSARS
EXPERIMENTAL DATA
EXTENSIVE AIR SHOWERS
COSMIC RADIATION
COSMIC RADIO SOURCES
COSMIC SHOWERS
DATA
ELECTROMAGNETIC RADIATION
INFORMATION
IONIZING RADIATIONS
NEBULAE
NUMERICAL DATA
RADIATION FLUX
RADIATIONS
SECONDARY COSMIC RADIATION
SHOWERS
SUPERNOVA REMNANTS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources
640101 - Astrophysics & Cosmology- Cosmic Radiation