2004ApJ...607..778S

Query : 2004ApJ...607..778S

2004ApJ...607..778S - Astrophys. J., 607, 778-787 (2004/June-1)

High-energy gamma-ray observations of W Comae with the Solar Tower Atmospheric Cerenkov Effect Experiment (STACEE).

SCALZO R.A., BOONE L.M., BRAMEL D., CARSON J., COVAULT C.E., FORTIN P., GAUTHIER G., GINGRICH D.M., HANNA D., JARVIS A., KILDEA J., LINDNER T., MUELLER C., MUKHERJEE R., ONG R.A., RAGAN K.J., WILLIAMS D.A., ZWEERINK J. (The STACEE Collaboration)

Abstract (from CDS):

We report on observations of the blazar W Com (ON+231) with the Solar Tower Atmospheric Cerenkov Effect Experiment (STACEE), a wave front-sampling atmospheric Cerenkov telescope, in the spring of 2003. In a data set comprising 10.5 hr of on-source observing time, we detect no significant emission from W Com. We discuss the implications of our results in the context of the composition of the relativistic jet in W Com, examining both leptonic and hadronic models for the jet. We derive 95% confidence level upper limits on the flux at the level of (1.5-3.5)x10^–10/cm2/s above 100 GeV for the leptonic models, or (0.5-1.1)x10^–10/cm2/s above 150 GeV for the hadronic models.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: individual (W Com) - Galaxies: Active - Gamma Rays: Observations

Simbad objects: 8

Full paper

View the references in ADS

Number of rows : 8

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	Z 184-50	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31		~	2841	1
2	* 51 UMa	PM*	11 04 31.2283728072	+38 14 28.900070520		6.18	6.02	7.39	5.86	A3Vp	83	0
3	7C 1219+2830	BLL	12 21 31.6904439888	+28 13 58.500308172		16.81	16.11	14.24		~	924	1
4	* 21 Com	a2*	12 31 00.5605002264	+24 34 01.797245328		5.496	5.436			A2pv	295	0
5	* iot CrB	SB*	16 01 26.5649192496	+29 51 03.819408336		4.921	4.971			A0IIIspHgMnEu	275	0
6	* 25 Her	**	16 25 24.1688222784	+37 23 38.586829272	5.790	5.710	5.540			A5V	105	0
7	Z 225-7	BLL	16 53 52.21668403	+39 45 36.6088754	14.09	14.15	13.29	8.26		~	2304	2
8	HD 167370	*	18 13 04.8190296720	+38 46 24.566041776	5.78	5.966	6.033			B9IIIn	47	0

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