Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58

K. T.S. Brazier; D. L. Bertsch; C. E. Fichtel; J. M. Fierro; R. C. Hartman; S. D. Hunter; G. Kanbach; D. A. Kniffen; Y. C. Lin; J. R. Mattox; H. A. Mayer-Hasselwander; P. F. Michelson; C. Von Montigny; H. I. Nel; P. L. Nolan; E. Schneid; P. Sreekumar; D. J. Thompson

doi:10.1093/mnras/268.2.517

Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58

K. T.S. Brazier
, D. L. Bertsch
, C. E. Fichtel
, J. M. Fierro
, R. C. Hartman
, S. D. Hunter
, G. Kanbach
, D. A. Kniffen
, Y. C. Lin
, J. R. Mattox
, H. A. Mayer-Hasselwander
, P. F. Michelson
, C. Von Montigny
, H. I. Nel
, P. L. Nolan
, E. Schneid
, P. Sreekumar
, D. J. Thompson

Manipal Centre for Natural Sciences, Manipal

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

The high-energy gamma-ray telescope EGRET observed the positions of two young pulsars, PSR 1951 + 32 and 1509-58, during its all-sky survey. Despite their youth and relative proximity to the Earth, neither pulsar is detected as a point source or in periodicity analysis. Flux limits of a few x10^-7 photon cm^-2 s^-1 are obtained for emission above 100 MeV, and ∼10^-6 photon cm^-2 s^-1 for 30-100 MeV. For the conventional assumption of beaming into 1 sr, the flux limits suggest that less than 3.2 per cent of the radiation from PSR 1509-58, and less than 1.8 per cent from PSR 1951+ 32, is in the form of beamed high-energy gamma-rays. The PSR 1509-58 limits lie approximately one order of magnitude below the extrapolated hard X-ray spectrum and suggest that the spectrum steepens in the MeV region.

Original language	English
Pages (from-to)	517-520
Number of pages	4
Journal	Monthly Notices of the Royal Astronomical Society
Volume	268
Issue number	2
DOIs	https://doi.org/10.1093/mnras/268.2.517
Publication status	Published - 1994

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1093/mnras/268.2.517

Cite this

Brazier, K. T. S., Bertsch, D. L., Fichtel, C. E., Fierro, J. M., Hartman, R. C., Hunter, S. D., Kanbach, G., Kniffen, D. A., Lin, Y. C., Mattox, J. R., Mayer-Hasselwander, H. A., Michelson, P. F., Von Montigny, C., Nel, H. I., Nolan, P. L., Schneid, E., Sreekumar, P., & Thompson, D. J. (1994). Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58. Monthly Notices of the Royal Astronomical Society, 268(2), 517-520. https://doi.org/10.1093/mnras/268.2.517

@article{6ae0e7d9331f4e10a22f9d7fb2622f43,

title = "Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58",

abstract = "The high-energy gamma-ray telescope EGRET observed the positions of two young pulsars, PSR 1951 + 32 and 1509-58, during its all-sky survey. Despite their youth and relative proximity to the Earth, neither pulsar is detected as a point source or in periodicity analysis. Flux limits of a few x10-7 photon cm-2 s-1 are obtained for emission above 100 MeV, and ∼10-6 photon cm-2 s-1 for 30-100 MeV. For the conventional assumption of beaming into 1 sr, the flux limits suggest that less than 3.2 per cent of the radiation from PSR 1509-58, and less than 1.8 per cent from PSR 1951+ 32, is in the form of beamed high-energy gamma-rays. The PSR 1509-58 limits lie approximately one order of magnitude below the extrapolated hard X-ray spectrum and suggest that the spectrum steepens in the MeV region.",

author = "Brazier, \{K. T.S.\} and Bertsch, \{D. L.\} and Fichtel, \{C. E.\} and Fierro, \{J. M.\} and Hartman, \{R. C.\} and Hunter, \{S. D.\} and G. Kanbach and Kniffen, \{D. A.\} and Lin, \{Y. C.\} and Mattox, \{J. R.\} and Mayer-Hasselwander, \{H. A.\} and Michelson, \{P. F.\} and \{Von Montigny\}, C. and Nel, \{H. I.\} and Nolan, \{P. L.\} and E. Schneid and P. Sreekumar and Thompson, \{D. J.\}",

year = "1994",

doi = "10.1093/mnras/268.2.517",

language = "English",

volume = "268",

pages = "517--520",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Brazier, KTS, Bertsch, DL, Fichtel, CE, Fierro, JM, Hartman, RC, Hunter, SD, Kanbach, G, Kniffen, DA, Lin, YC, Mattox, JR, Mayer-Hasselwander, HA, Michelson, PF, Von Montigny, C, Nel, HI, Nolan, PL, Schneid, E, Sreekumar, P & Thompson, DJ 1994, 'Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58', Monthly Notices of the Royal Astronomical Society, vol. 268, no. 2, pp. 517-520. https://doi.org/10.1093/mnras/268.2.517

TY - JOUR

T1 - Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58

AU - Brazier, K. T.S.

AU - Bertsch, D. L.

AU - Fichtel, C. E.

AU - Fierro, J. M.

AU - Hartman, R. C.

AU - Hunter, S. D.

AU - Kanbach, G.

AU - Kniffen, D. A.

AU - Lin, Y. C.

AU - Mattox, J. R.

AU - Mayer-Hasselwander, H. A.

AU - Michelson, P. F.

AU - Von Montigny, C.

AU - Nel, H. I.

AU - Nolan, P. L.

AU - Schneid, E.

AU - Sreekumar, P.

AU - Thompson, D. J.

PY - 1994

Y1 - 1994

N2 - The high-energy gamma-ray telescope EGRET observed the positions of two young pulsars, PSR 1951 + 32 and 1509-58, during its all-sky survey. Despite their youth and relative proximity to the Earth, neither pulsar is detected as a point source or in periodicity analysis. Flux limits of a few x10-7 photon cm-2 s-1 are obtained for emission above 100 MeV, and ∼10-6 photon cm-2 s-1 for 30-100 MeV. For the conventional assumption of beaming into 1 sr, the flux limits suggest that less than 3.2 per cent of the radiation from PSR 1509-58, and less than 1.8 per cent from PSR 1951+ 32, is in the form of beamed high-energy gamma-rays. The PSR 1509-58 limits lie approximately one order of magnitude below the extrapolated hard X-ray spectrum and suggest that the spectrum steepens in the MeV region.

AB - The high-energy gamma-ray telescope EGRET observed the positions of two young pulsars, PSR 1951 + 32 and 1509-58, during its all-sky survey. Despite their youth and relative proximity to the Earth, neither pulsar is detected as a point source or in periodicity analysis. Flux limits of a few x10-7 photon cm-2 s-1 are obtained for emission above 100 MeV, and ∼10-6 photon cm-2 s-1 for 30-100 MeV. For the conventional assumption of beaming into 1 sr, the flux limits suggest that less than 3.2 per cent of the radiation from PSR 1509-58, and less than 1.8 per cent from PSR 1951+ 32, is in the form of beamed high-energy gamma-rays. The PSR 1509-58 limits lie approximately one order of magnitude below the extrapolated hard X-ray spectrum and suggest that the spectrum steepens in the MeV region.

UR - https://www.scopus.com/pages/publications/85077056519

UR - https://www.scopus.com/pages/publications/85077056519#tab=citedBy

U2 - 10.1093/mnras/268.2.517

DO - 10.1093/mnras/268.2.517

M3 - Article

AN - SCOPUS:85077056519

SN - 0035-8711

VL - 268

SP - 517

EP - 520

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Upper limits on the high-energy gamma-ray fluxes from PSR 1951 + 32 and 1509-58

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this