Survey of ultra-high-energy gamma-ray emission in the magellanic clouds

W. H. Allen, I. A. Bond, E. Budding, M. J. Conway, A. Daniel, K. B. Fenton, H. Fujii, Z. Fujii, N. Hayashida, K. Hibino, M. Honda, J. E. Humble, S. Kabe, K. Kasahara, T. Kifune, G. D. Lythe, A. Masaike, Y. Matsubara, K. Mitsui, Y. MiuraM. Mori, Y. Muraki, M. Nagano, T. Nakamura, M. Nishizawa, P. M. Norris, S. Ogio, T. O. Saito, M. Sakata, H. Sato, H. M. Shimizu, M. Spencer, J. R. Storey, T. Tanimori, M. Teshima, Shoji Torii, A. Wadsworth, Y. Watase, M. D. Woodhams, Y. Yamamoto, P. C M Yock, T. Yuda

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Various objects in the Magellanic Clouds were monitored for ultra-high-energy (UHE) gamma-ray emission during 1988 and 1990 using Cerenkov technique at large zenith angles with the JANZOS facility. During 1990 the equipment was modified to allow a sky coverage of 7° × 23° at large zenith angles. This enabled most of the extent of the Large Magellanic Cloud to be surveyed at ultra-high energies. An examination of the data base yielded no clear eivdence for persistent UHE emission from SN 1987A and selected X-ray pulsars in the Magellanic Clouds. Upper limits on the UHE fluxes (in cm-2 s-1) above the given threshold energies were obtained as follows: SMC X-1, 2.6 × 10-13 (>30 TeV); SN 1987A, 3.8 × 10-13 (>65 TeV); PSR 0540-693, 3.7 × 10-13 (>65 TeV); A0538-66, 1.1 × 10-13 (>130 TeV); LMC X-4, 3.5 × 10-13 (> 140 TeV). We then examined the data base for pulsed UHE emission from PSR 0540 - 693 at the well-determined X-ray period (50 ms); and for the X-ray binary systems SMC X-1 and LMC X-4, we carried out pulsar periodicity searches on a night-by-night basis near their respective X-ray periods. No statistically significant evidence for pulsed UHE emission was found for these objects. The data base was further examined for evidence of previously undetected UHE sources in the Magellanic Clouds, and no significant DC excesses were found. Finally, we obtained upper limits on the UHE gamma-ray emission from these galaxies as a whole of 1.9 × 10-12 cm-2 s-1 msr-1 (>30 TeV) for the SMC and 1.8 × 10-13 cm-2 s-1 msr-1 (>65 TeV) for the LMC.

Original languageEnglish
Pages (from-to)239-248
Number of pages10
JournalAstrophysical Journal
Volume403
Issue number1
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Magellanic clouds
gamma rays
energy
data bases
zenith angle
zenith
night
pulsars
x rays
energy flux
energy sources
periodicity
sky
periodic variations
examination
direct current
galaxies
thresholds
data base

Keywords

  • Binaries: close
  • Gamma rays: observations
  • Magellanic clouds

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Allen, W. H., Bond, I. A., Budding, E., Conway, M. J., Daniel, A., Fenton, K. B., ... Yuda, T. (1993). Survey of ultra-high-energy gamma-ray emission in the magellanic clouds. Astrophysical Journal, 403(1), 239-248.

Survey of ultra-high-energy gamma-ray emission in the magellanic clouds. / Allen, W. H.; Bond, I. A.; Budding, E.; Conway, M. J.; Daniel, A.; Fenton, K. B.; Fujii, H.; Fujii, Z.; Hayashida, N.; Hibino, K.; Honda, M.; Humble, J. E.; Kabe, S.; Kasahara, K.; Kifune, T.; Lythe, G. D.; Masaike, A.; Matsubara, Y.; Mitsui, K.; Miura, Y.; Mori, M.; Muraki, Y.; Nagano, M.; Nakamura, T.; Nishizawa, M.; Norris, P. M.; Ogio, S.; Saito, T. O.; Sakata, M.; Sato, H.; Shimizu, H. M.; Spencer, M.; Storey, J. R.; Tanimori, T.; Teshima, M.; Torii, Shoji; Wadsworth, A.; Watase, Y.; Woodhams, M. D.; Yamamoto, Y.; Yock, P. C M; Yuda, T.

In: Astrophysical Journal, Vol. 403, No. 1, 1993, p. 239-248.

Research output: Contribution to journalArticle

Allen, WH, Bond, IA, Budding, E, Conway, MJ, Daniel, A, Fenton, KB, Fujii, H, Fujii, Z, Hayashida, N, Hibino, K, Honda, M, Humble, JE, Kabe, S, Kasahara, K, Kifune, T, Lythe, GD, Masaike, A, Matsubara, Y, Mitsui, K, Miura, Y, Mori, M, Muraki, Y, Nagano, M, Nakamura, T, Nishizawa, M, Norris, PM, Ogio, S, Saito, TO, Sakata, M, Sato, H, Shimizu, HM, Spencer, M, Storey, JR, Tanimori, T, Teshima, M, Torii, S, Wadsworth, A, Watase, Y, Woodhams, MD, Yamamoto, Y, Yock, PCM & Yuda, T 1993, 'Survey of ultra-high-energy gamma-ray emission in the magellanic clouds', Astrophysical Journal, vol. 403, no. 1, pp. 239-248.
Allen WH, Bond IA, Budding E, Conway MJ, Daniel A, Fenton KB et al. Survey of ultra-high-energy gamma-ray emission in the magellanic clouds. Astrophysical Journal. 1993;403(1):239-248.
Allen, W. H. ; Bond, I. A. ; Budding, E. ; Conway, M. J. ; Daniel, A. ; Fenton, K. B. ; Fujii, H. ; Fujii, Z. ; Hayashida, N. ; Hibino, K. ; Honda, M. ; Humble, J. E. ; Kabe, S. ; Kasahara, K. ; Kifune, T. ; Lythe, G. D. ; Masaike, A. ; Matsubara, Y. ; Mitsui, K. ; Miura, Y. ; Mori, M. ; Muraki, Y. ; Nagano, M. ; Nakamura, T. ; Nishizawa, M. ; Norris, P. M. ; Ogio, S. ; Saito, T. O. ; Sakata, M. ; Sato, H. ; Shimizu, H. M. ; Spencer, M. ; Storey, J. R. ; Tanimori, T. ; Teshima, M. ; Torii, Shoji ; Wadsworth, A. ; Watase, Y. ; Woodhams, M. D. ; Yamamoto, Y. ; Yock, P. C M ; Yuda, T. / Survey of ultra-high-energy gamma-ray emission in the magellanic clouds. In: Astrophysical Journal. 1993 ; Vol. 403, No. 1. pp. 239-248.
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abstract = "Various objects in the Magellanic Clouds were monitored for ultra-high-energy (UHE) gamma-ray emission during 1988 and 1990 using Cerenkov technique at large zenith angles with the JANZOS facility. During 1990 the equipment was modified to allow a sky coverage of 7° × 23° at large zenith angles. This enabled most of the extent of the Large Magellanic Cloud to be surveyed at ultra-high energies. An examination of the data base yielded no clear eivdence for persistent UHE emission from SN 1987A and selected X-ray pulsars in the Magellanic Clouds. Upper limits on the UHE fluxes (in cm-2 s-1) above the given threshold energies were obtained as follows: SMC X-1, 2.6 × 10-13 (>30 TeV); SN 1987A, 3.8 × 10-13 (>65 TeV); PSR 0540-693, 3.7 × 10-13 (>65 TeV); A0538-66, 1.1 × 10-13 (>130 TeV); LMC X-4, 3.5 × 10-13 (> 140 TeV). We then examined the data base for pulsed UHE emission from PSR 0540 - 693 at the well-determined X-ray period (50 ms); and for the X-ray binary systems SMC X-1 and LMC X-4, we carried out pulsar periodicity searches on a night-by-night basis near their respective X-ray periods. No statistically significant evidence for pulsed UHE emission was found for these objects. The data base was further examined for evidence of previously undetected UHE sources in the Magellanic Clouds, and no significant DC excesses were found. Finally, we obtained upper limits on the UHE gamma-ray emission from these galaxies as a whole of 1.9 × 10-12 cm-2 s-1 msr-1 (>30 TeV) for the SMC and 1.8 × 10-13 cm-2 s-1 msr-1 (>65 TeV) for the LMC.",
keywords = "Binaries: close, Gamma rays: observations, Magellanic clouds",
author = "Allen, {W. H.} and Bond, {I. A.} and E. Budding and Conway, {M. J.} and A. Daniel and Fenton, {K. B.} and H. Fujii and Z. Fujii and N. Hayashida and K. Hibino and M. Honda and Humble, {J. E.} and S. Kabe and K. Kasahara and T. Kifune and Lythe, {G. D.} and A. Masaike and Y. Matsubara and K. Mitsui and Y. Miura and M. Mori and Y. Muraki and M. Nagano and T. Nakamura and M. Nishizawa and Norris, {P. M.} and S. Ogio and Saito, {T. O.} and M. Sakata and H. Sato and Shimizu, {H. M.} and M. Spencer and Storey, {J. R.} and T. Tanimori and M. Teshima and Shoji Torii and A. Wadsworth and Y. Watase and Woodhams, {M. D.} and Y. Yamamoto and Yock, {P. C M} and T. Yuda",
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TY - JOUR

T1 - Survey of ultra-high-energy gamma-ray emission in the magellanic clouds

AU - Allen, W. H.

AU - Bond, I. A.

AU - Budding, E.

AU - Conway, M. J.

AU - Daniel, A.

AU - Fenton, K. B.

AU - Fujii, H.

AU - Fujii, Z.

AU - Hayashida, N.

AU - Hibino, K.

AU - Honda, M.

AU - Humble, J. E.

AU - Kabe, S.

AU - Kasahara, K.

AU - Kifune, T.

AU - Lythe, G. D.

AU - Masaike, A.

AU - Matsubara, Y.

AU - Mitsui, K.

AU - Miura, Y.

AU - Mori, M.

AU - Muraki, Y.

AU - Nagano, M.

AU - Nakamura, T.

AU - Nishizawa, M.

AU - Norris, P. M.

AU - Ogio, S.

AU - Saito, T. O.

AU - Sakata, M.

AU - Sato, H.

AU - Shimizu, H. M.

AU - Spencer, M.

AU - Storey, J. R.

AU - Tanimori, T.

AU - Teshima, M.

AU - Torii, Shoji

AU - Wadsworth, A.

AU - Watase, Y.

AU - Woodhams, M. D.

AU - Yamamoto, Y.

AU - Yock, P. C M

AU - Yuda, T.

PY - 1993

Y1 - 1993

N2 - Various objects in the Magellanic Clouds were monitored for ultra-high-energy (UHE) gamma-ray emission during 1988 and 1990 using Cerenkov technique at large zenith angles with the JANZOS facility. During 1990 the equipment was modified to allow a sky coverage of 7° × 23° at large zenith angles. This enabled most of the extent of the Large Magellanic Cloud to be surveyed at ultra-high energies. An examination of the data base yielded no clear eivdence for persistent UHE emission from SN 1987A and selected X-ray pulsars in the Magellanic Clouds. Upper limits on the UHE fluxes (in cm-2 s-1) above the given threshold energies were obtained as follows: SMC X-1, 2.6 × 10-13 (>30 TeV); SN 1987A, 3.8 × 10-13 (>65 TeV); PSR 0540-693, 3.7 × 10-13 (>65 TeV); A0538-66, 1.1 × 10-13 (>130 TeV); LMC X-4, 3.5 × 10-13 (> 140 TeV). We then examined the data base for pulsed UHE emission from PSR 0540 - 693 at the well-determined X-ray period (50 ms); and for the X-ray binary systems SMC X-1 and LMC X-4, we carried out pulsar periodicity searches on a night-by-night basis near their respective X-ray periods. No statistically significant evidence for pulsed UHE emission was found for these objects. The data base was further examined for evidence of previously undetected UHE sources in the Magellanic Clouds, and no significant DC excesses were found. Finally, we obtained upper limits on the UHE gamma-ray emission from these galaxies as a whole of 1.9 × 10-12 cm-2 s-1 msr-1 (>30 TeV) for the SMC and 1.8 × 10-13 cm-2 s-1 msr-1 (>65 TeV) for the LMC.

AB - Various objects in the Magellanic Clouds were monitored for ultra-high-energy (UHE) gamma-ray emission during 1988 and 1990 using Cerenkov technique at large zenith angles with the JANZOS facility. During 1990 the equipment was modified to allow a sky coverage of 7° × 23° at large zenith angles. This enabled most of the extent of the Large Magellanic Cloud to be surveyed at ultra-high energies. An examination of the data base yielded no clear eivdence for persistent UHE emission from SN 1987A and selected X-ray pulsars in the Magellanic Clouds. Upper limits on the UHE fluxes (in cm-2 s-1) above the given threshold energies were obtained as follows: SMC X-1, 2.6 × 10-13 (>30 TeV); SN 1987A, 3.8 × 10-13 (>65 TeV); PSR 0540-693, 3.7 × 10-13 (>65 TeV); A0538-66, 1.1 × 10-13 (>130 TeV); LMC X-4, 3.5 × 10-13 (> 140 TeV). We then examined the data base for pulsed UHE emission from PSR 0540 - 693 at the well-determined X-ray period (50 ms); and for the X-ray binary systems SMC X-1 and LMC X-4, we carried out pulsar periodicity searches on a night-by-night basis near their respective X-ray periods. No statistically significant evidence for pulsed UHE emission was found for these objects. The data base was further examined for evidence of previously undetected UHE sources in the Magellanic Clouds, and no significant DC excesses were found. Finally, we obtained upper limits on the UHE gamma-ray emission from these galaxies as a whole of 1.9 × 10-12 cm-2 s-1 msr-1 (>30 TeV) for the SMC and 1.8 × 10-13 cm-2 s-1 msr-1 (>65 TeV) for the LMC.

KW - Binaries: close

KW - Gamma rays: observations

KW - Magellanic clouds

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