7. 1ES 2344+51.4
The spectral energy distribution of 1ES 2344+51.4 is shown in Fig. 6. This source was observed by the Whipple group during the winter months of 1995/96 and 1996/97 (Catanese et al. 1998). Whipple detected a flare on December 20th 1995 with a flux of 6.6 ph cm-2 s-1 ( 63% of the Crab); the mean flux (excluding the flare emission) during the first winter was estimated as 1.1 ph cm-2 s-1 (11% of the Crab). For the period 96-97 an upper limit of 8.2 ph cm-2 s-1 (8% of the Crab) was reported (all integral fluxes above 350 GeV).
The flux limit computed from the 1997/1998 HEGRA CT-system data is 2.9 ph cm-2 s-1 ( 1 TeV). The smooth curve in the 2-10 keV band (Fig. 5) indicates that the source has been in a low and stable state for 1.5 years. The source was not monitored by the ASM during the winter 1995/1996, therefore, unfortunately, the 2-10 keV activity during the state of VHE-emission could not be examined.
© European Southern Observatory (ESO) 2000
Online publication: January 18, 2000