Table 3: Multiwavelength fluxes from Mrk 421 coincident with CELESTE data. The epoch numbers (1) through (5) are referred to in the text and figures. (a) ASM counts per second (see ASM in references). RXTE PCA 2-10 keV fluxes are in (b) $10^{-10}~{\rm erg~cm^{-2}~s^{-1}}$, 3-20 keV (Krawczynski et al. 2001), and in (c) counts per second (B\lazejowski et al. 2005). (d) CAT fluxes are in $10^{-12}~{\rm photons~cm^{-2}~s^{-1}},~E>250~{\rm GeV}$ (Piron et al. 2001a,b). (e) HEGRA fluxes are in $10^{-12}~{\rm photons~cm^{-2}~s^{-1}},~E>1000~{\rm GeV}$ (Krawczynski et al. 2001 for the 2000 data, Aharonian et al. 2003 for 2001). (f) VERITAS fluxes above 300 GeV are in gamma/min, where the Crab gave 2.40 (2.93) gamma/min for 02/03 (03/04) (Holder et al. 2001; B\lazejowski et al. 2005). (g) CELESTE fluxes are in $10^{-9}~{\rm photons~cm^{-2}~s^{-1}},~E>100~{\rm GeV}$.
Epoch ASM (a) PCA CAT (d) HEGRA (e) VERITAS (f) CELESTE (g)
2000 Feb. 4 $1.25\pm0.10$   $189.7\pm21.2$ $11.24\pm3.41$   $0.97\pm0.17$
(51577.99 to 51578.18)            
2000 Feb. 10 $1.51\pm0.21$ $1.41\pm0.02$ (b) $85.3\pm19.7$ $2.43\pm1.93$   $0.48\pm0.14$
(51583.99 to 51584.18)            
(1) 2000 Feb. 27 to March 12 $0.39\pm0.06$   $48.3\pm10.9$ $3.9\pm0.8$   $0.29\pm0.07$
(51601.96 to 51615.09)            
(2) 2001 Feb. (4 nights) $2.98\pm1.57$   $208.7\pm10.5$ $22.5\pm0.8$ $4.35\pm0.29$ $0.93\pm0.09$
(51956.98 to 51963.11)            
2001 April 14 to 17 $1.26\pm0.17$   $131.7\pm16.3$ $18.7\pm3.1$ $4.65\pm0.22$ $0.34\pm0.12$
(52012.90 to 52015.97)            
(3) 2003 Feb. to April $0.70\pm0.03$ $17.3\pm0.02$ (c)     $0.94\pm0.04$ $0.60\pm0.12$
(52667.12 to 52762.94)            
(4) 2004 Feb. 15 to 18 $2.47\pm0.23$ $39.3\pm0.1$ (c)     $1.66\pm0.20$ $1.04\pm0.10$
(53050.05 to 53053.08)            
(5) 2004 March 16 to 18 $1.74\pm0.31$ $48.4\pm0.2$ (c)     $3.37\pm0.17$ $0.71\pm0.09$
(53079.91 to 53082.02)            


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