The following calibration format can be used directly in 
IRAF.digiphot.photcal.invertfit. The instrumental magnitudes
mJ, mH, and mK are -2.5*log(counts/s)+25.

For the these images, the average parameters for JHK are the following:
Airmass---1.04, 1.04, 1.30
Integration time (s)---25.95, 7.90, 5.95
Pixel scale (arcsec)---1.5, 1.5, 1.5

# Fri 12:55:07 07-Nov-2003
begin	JFIT
	status	0	(Solution converged)
	variance	3.712130E-4
	stdeviation	0.01926689
	avsqerror	3.791071E-4
	averror		0.01947067
	avsqscatter	0.
	avscatter	0.
	chisqr		0.9791772
	msq		3.016106E-4
	rms		0.01736694
	reference	mJ
	fitting		J+j1+j2*XJ+j3*JH
	weights		photometric
	parameters	3
		j1	(fit)
		j2	(fit)
		j3	(fit)
	derivatives	3
		0.1
		0.1
		0.1
	values	3
		3.344196
		0.0834231
		-0.1042768
	errors	3
		0.04622651
		0.03710712
		0.03108403

# Fri 12:55:15 07-Nov-2003
begin	HFIT
	status	0	(Solution converged)
	variance	8.012780E-4
	stdeviation	0.02830685
	avsqerror	0.001201885
	averror		0.03466821
	avsqscatter	1.874815E-4
	avscatter	0.01369239
	chisqr		0.6666847
	msq		6.009585E-4
	rms		0.02451446
	reference	mH
	fitting		(J-JH)+h1+h2*XH+h3*JH
	weights		photometric
	parameters	3
		h1	(fit)
		h2	(fit)
		h3	(fit)
	derivatives	3
		0.1
		0.1
		0.1
	values	3
		3.500429
		0.1264963
		-0.04915378
	errors	3
		0.06478246
		0.0470113
		0.07399762

# Fri 15:29:21 23-Apr-2004
begin	KFIT
	status	0	(Solution converged)
	variance	0.002244474
	stdeviation	0.04737588
	avsqerror	0.00318836
	averror		0.05646557
	avsqscatter	7.636927E-4
	avscatter	0.02763499
	chisqr		0.7039587
	msq		0.001923835
	rms		0.04386154
	reference	mK
	fitting		(J-JH-HK)+k1+k2*XK+k3*HK
	weights		photometric
	parameters	3
		k1	(fit)
		k2	(fit)
		k3	(constant)
	derivatives	3
		0.1
		0.1
		0.1
	values	3
		4.198116
		0.1116762
		-0.16
	errors	3
		0.08379932
		0.06323234
		0.