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/*     MITSuME Data Analysis      Mrk 421  */
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Instrument : 50cm optical telescope that have 
	     3 CCD cameras with g'(SDSS), Rc, Ic (Cousins) filters

Analysis : used IRAF for aperture photometry with fixed aperture radius of 10 arcsec.

Reference star : star 1 and 2 of Villata et al., 1998
	         B, V, R mag : from Villata et al.
		 I       mag : from the AAVSO (HENDEN USNO)

       USNO_B1_number  RA2000       Dec2000    Bmag  err   Vmag  err   Rmag  err   Imag
star1: 1282.0230257 11:04:51.123 +38:17:10.41  15.02 0.03  14.36 0.02  14.04 0.02  13.679 0.009
star2: 1282.0229958 11:04:18.193 +38:16:30.66  16.20 0.04  15.57 0.05  15.20 0.03  14.852 0.021

       the magunitude of g' are derived from Bmag and Vmag using equation in Ivezic et al., 2007

       USNO_B1_number  RA2000       Dec2000    Bmag  err   Vmag  err   g'mag  err
star1: 1282.0230257 11:04:51.123 +38:17:10.41  15.02 0.03  14.36 0.02  14.65 0.04
star2: 1282.0229958 11:04:18.193 +38:16:30.66  16.20 0.04  15.57 0.05  15.84 0.06



Host Galaxy Flux :  Table B.8 of Nilsson et al, 2007
     Rc band : 9.7 +/- 0.5  mJy
               F_Rc = 3080.0 * 10^(-0.4 * Rcmag)     (from Nilsson et al)
	       
     g' band : converting Rc band flux : 4.8 +/- 0.3  mJy
               g' - Rc = 1.02                        (from Fukugita et al., 1995  Table 3 (a))
               F_g' = 3930.0 * 10^(-0.4 * g'mag)     (from Fukugita et al., 1995)

     Ic band : converting Rc band flux : 14 +/- 1  mJy
               Rc - Ic = 0.7                         (from Fukugita et al., 1995  Table 3 (m))
               F_Ic = 2380.0 * 10^(-0.4 * Icmag)     (from Fukugita et al., 1995)