2008ApJ...676..113S

Query : 2008ApJ...676..113S

2008ApJ...676..113S - Astrophys. J., 676, 113-120 (2008/March-3)

CANGAROO-III observations of the 2006 outburst of PKS 2155-304.

SAKAMOTO Y., NISHIJIMA K., MIZUKAMI T., YAMAZAKI E., KUSHIDA J., ENOMOTO R., OHISHI M., BICKNELL G.V., CLAY R.W., EDWARDS P.G., GUNJI S., HARA S., HATTORI T., HAYASHI S., HIGASHI Y., HIRAI Y., INOUE K., ITOH C., KABUKI S., KAJINO F., KATAGIRI H., KAWACHI A., KIFUNE T., KIUCHI R., KUBO H., MIZUNIWA R., MORI M., MURAISHI H., NAITO T., NAKAMORI T., NAKANO S., NISHIDA D., SEKI A., STAMATESCU V., SUZUKI T., SWABY D.L., TANIMORI T., THORNTON G., TOKANAI F., TSUCHIYA K., WATANABE S., YAMADA Y., YANAGITA S., YOSHIDA T., YOSHIKOSHI T. and YUKAWA Y.

Abstract (from CDS):

We have used the CANGAROO-III imaging atmospheric Cerenkov telescopes to observe the high-frequency-peaked BL Lacertae (HBL) object PKS 2155-304 between 2006 July 28 (MJD 53,944) and August 2, triggered by the H.E.S.S. report that the source was in a high state of TeV gamma-ray emission. A signal was detected at the 4.8 σ level in an effective live time of 25.1 hr during the outburst period. The flux of very high energy gamma rays from the CANGAROO-III observations shows variability on the timescale of less than a few hours. The averaged integral flux above 660 GeV is (1.6±0.3_stat±0.5_syst)x10^–11/cm2/s, which corresponds to ∼45% of the flux observed from the Crab Nebula. Follow-up observations between August 17 (MJD 53,964) and 25 indicate that the source activity had decreased.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: BL Lacertae Objects: Individual: Alphanumeric: PKS 2155-304 - Galaxies: Active - Gamma Rays: Observations

Simbad objects: 5

Full paper

View the references in ADS

Number of rows : 5

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2026	#notes
1	M 1	SNR	05 34 31.8	+22 01 03					~	6516	1
2	Z 184-50	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31	~	2841	1
3	Z 225-7	BLL	16 53 52.21668403	+39 45 36.6088754	14.09	14.15	13.29	8.26	~	2304	2
4	QSO B1959+650	BLL	19 59 59.8520303688	+65 08 54.652536492			12.8	11.21	~	699	2
5	PKS J2158-3013	BLL	21 58 52.0652249880	-30 13 32.118447792		13.36	13.09	12.62	~	1829	1

To bookmark this query, right click on this link: simbad:objects in 2008ApJ...676..113S and select 'bookmark this link' or equivalent in the popup menu