TeV gamma-ray observations of three X-ray selected BL Lacs

M. D. Roberts; P. McGee; S. A. Dazeley; P. G. Edwards; T. Hara; J. Holder; A. Kawachi; T. Kifune; Y. Matsubara; Y. Mizumoto; M. Mori; H. Muraishi; Y. Muraki; T. Naito; K. Nishijima; S. Ogio; T. Osaki; J. R. Patterson; G. P. Rowell; T. Sako; K. Sakurazawa; R. Susukita; T. Tamura; T. Tanimori; G. J. Thornton; S. Yanagita; T. Yoshida; T. Yoshikoshi

TeV gamma-ray observations of three X-ray selected BL Lacs

M. D. Roberts, P. McGee, S. A. Dazeley, P. G. Edwards, T. Hara, J. Holder, A. Kawachi, T. Kifune, Y. Matsubara, Y. Mizumoto, M. Mori, H. Muraishi, Y. Muraki, T. Naito, K. Nishijima, S. Ogio, T. Osaki, J. R. Patterson, G. P. Rowell, T. SakoK. Sakurazawa, R. Susukita, T. Tamura, T. Tanimori, G. J. Thornton, S. Yanagita, T. Yoshida, T. Yoshikoshi

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

19 Citations (Scopus)

Abstract

Despite extensive surveys of extragalactic TeV gamma-ray candidates only 3 sources have so far been detected. All three are northern hemisphere objects and all three are low-redshift X-ray selected BL Lacs (XBLs). In this paper we present the results of observations of the three nearest southern hemisphere XBLs (PKS0548-322, PKS2005-489 and PKS2155-304) with the CANGAROO 3.8m imaging telescope. During the period of observation we estimate that the threshold of the 3.8m telescope was ∼1.5TeV. Searches for both steady and short timescale emission have been performed for each source. Additionally, we are able to monitor the X-ray state of each source on a daily basis and we have made contemporaneous measurements of optical activity for PKS0548-322 and PKS2155-304.

Original language	English
Pages (from-to)	691-696
Number of pages	6
Journal	Astronomy and Astrophysics
Volume	343
Issue number	3
Publication status	Published - 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Roberts, M. D., McGee, P., Dazeley, S. A., Edwards, P. G., Hara, T., Holder, J., Kawachi, A., Kifune, T., Matsubara, Y., Mizumoto, Y., Mori, M., Muraishi, H., Muraki, Y., Naito, T., Nishijima, K., Ogio, S., Osaki, T., Patterson, J. R., Rowell, G. P., ... Yoshikoshi, T. (1999). TeV gamma-ray observations of three X-ray selected BL Lacs. Astronomy and Astrophysics, 343(3), 691-696.

TeV gamma-ray observations of three X-ray selected BL Lacs. / Roberts, M. D.; McGee, P.; Dazeley, S. A.; Edwards, P. G.; Hara, T.; Holder, J.; Kawachi, A.; Kifune, T.; Matsubara, Y.; Mizumoto, Y.; Mori, M.; Muraishi, H.; Muraki, Y.; Naito, T.; Nishijima, K.; Ogio, S.; Osaki, T.; Patterson, J. R.; Rowell, G. P.; Sako, T.; Sakurazawa, K.; Susukita, R.; Tamura, T.; Tanimori, T.; Thornton, G. J.; Yanagita, S.; Yoshida, T.; Yoshikoshi, T.

In: Astronomy and Astrophysics, Vol. 343, No. 3, 1999, p. 691-696.

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

Roberts, MD, McGee, P, Dazeley, SA, Edwards, PG, Hara, T, Holder, J, Kawachi, A, Kifune, T, Matsubara, Y, Mizumoto, Y, Mori, M, Muraishi, H, Muraki, Y, Naito, T, Nishijima, K, Ogio, S, Osaki, T, Patterson, JR, Rowell, GP, Sako, T, Sakurazawa, K, Susukita, R, Tamura, T, Tanimori, T, Thornton, GJ, Yanagita, S, Yoshida, T & Yoshikoshi, T 1999, 'TeV gamma-ray observations of three X-ray selected BL Lacs', Astronomy and Astrophysics, vol. 343, no. 3, pp. 691-696.

Roberts, M. D. ; McGee, P. ; Dazeley, S. A. ; Edwards, P. G. ; Hara, T. ; Holder, J. ; Kawachi, A. ; Kifune, T. ; Matsubara, Y. ; Mizumoto, Y. ; Mori, M. ; Muraishi, H. ; Muraki, Y. ; Naito, T. ; Nishijima, K. ; Ogio, S. ; Osaki, T. ; Patterson, J. R. ; Rowell, G. P. ; Sako, T. ; Sakurazawa, K. ; Susukita, R. ; Tamura, T. ; Tanimori, T. ; Thornton, G. J. ; Yanagita, S. ; Yoshida, T. ; Yoshikoshi, T. / TeV gamma-ray observations of three X-ray selected BL Lacs. In: Astronomy and Astrophysics. 1999 ; Vol. 343, No. 3. pp. 691-696.

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title = "TeV gamma-ray observations of three X-ray selected BL Lacs",

abstract = "Despite extensive surveys of extragalactic TeV gamma-ray candidates only 3 sources have so far been detected. All three are northern hemisphere objects and all three are low-redshift X-ray selected BL Lacs (XBLs). In this paper we present the results of observations of the three nearest southern hemisphere XBLs (PKS0548-322, PKS2005-489 and PKS2155-304) with the CANGAROO 3.8m imaging telescope. During the period of observation we estimate that the threshold of the 3.8m telescope was ∼1.5TeV. Searches for both steady and short timescale emission have been performed for each source. Additionally, we are able to monitor the X-ray state of each source on a daily basis and we have made contemporaneous measurements of optical activity for PKS0548-322 and PKS2155-304.",

author = "Roberts, {M. D.} and P. McGee and Dazeley, {S. A.} and Edwards, {P. G.} and T. Hara and J. Holder and A. Kawachi and T. Kifune and Y. Matsubara and Y. Mizumoto and M. Mori and H. Muraishi and Y. Muraki and T. Naito and K. Nishijima and S. Ogio and T. Osaki and Patterson, {J. R.} and Rowell, {G. P.} and T. Sako and K. Sakurazawa and R. Susukita and T. Tamura and T. Tanimori and Thornton, {G. J.} and S. Yanagita and T. Yoshida and T. Yoshikoshi",

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T1 - TeV gamma-ray observations of three X-ray selected BL Lacs

AU - Roberts, M. D.

AU - McGee, P.

AU - Dazeley, S. A.

AU - Edwards, P. G.

AU - Hara, T.

AU - Holder, J.

AU - Kawachi, A.

AU - Kifune, T.

AU - Matsubara, Y.

AU - Mizumoto, Y.

AU - Mori, M.

AU - Muraishi, H.

AU - Muraki, Y.

AU - Naito, T.

AU - Nishijima, K.

AU - Ogio, S.

AU - Osaki, T.

AU - Patterson, J. R.

AU - Rowell, G. P.

AU - Sako, T.

AU - Sakurazawa, K.

AU - Susukita, R.

AU - Tamura, T.

AU - Tanimori, T.

AU - Thornton, G. J.

AU - Yanagita, S.

AU - Yoshida, T.

AU - Yoshikoshi, T.

PY - 1999

Y1 - 1999

N2 - Despite extensive surveys of extragalactic TeV gamma-ray candidates only 3 sources have so far been detected. All three are northern hemisphere objects and all three are low-redshift X-ray selected BL Lacs (XBLs). In this paper we present the results of observations of the three nearest southern hemisphere XBLs (PKS0548-322, PKS2005-489 and PKS2155-304) with the CANGAROO 3.8m imaging telescope. During the period of observation we estimate that the threshold of the 3.8m telescope was ∼1.5TeV. Searches for both steady and short timescale emission have been performed for each source. Additionally, we are able to monitor the X-ray state of each source on a daily basis and we have made contemporaneous measurements of optical activity for PKS0548-322 and PKS2155-304.

AB - Despite extensive surveys of extragalactic TeV gamma-ray candidates only 3 sources have so far been detected. All three are northern hemisphere objects and all three are low-redshift X-ray selected BL Lacs (XBLs). In this paper we present the results of observations of the three nearest southern hemisphere XBLs (PKS0548-322, PKS2005-489 and PKS2155-304) with the CANGAROO 3.8m imaging telescope. During the period of observation we estimate that the threshold of the 3.8m telescope was ∼1.5TeV. Searches for both steady and short timescale emission have been performed for each source. Additionally, we are able to monitor the X-ray state of each source on a daily basis and we have made contemporaneous measurements of optical activity for PKS0548-322 and PKS2155-304.

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JO - Astronomy and Astrophysics

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ER -

TeV gamma-ray observations of three X-ray selected BL Lacs

Abstract

All Science Journal Classification (ASJC) codes

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