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--1.48, 1.0, -
Integration time (s)---30.94, 6.91, -
Pixel scale (arcsec)---1.5, 1.5, -

# Fri 12:39:09 23-Apr-2004
begin	JFIT
	status	0	(Solution converged)
	variance	0.001019377
	stdeviation	0.03192768
	avsqerror	0.001017745
	averror		0.03190212
	avsqscatter	8.777083E-4
	avscatter	0.02962614
	chisqr		1.001603
	msq		9.996467E-4
	rms		0.03161719
	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
		3.63639
		0.1470083
		-0.004540632
	errors	3
		0.020433
		0.01033582
		0.05138629

# Tue 10:46:42 25-Nov-2003
begin	HFIT
	status	0	(Solution converged)
	variance	0.002945108
	stdeviation	0.05426885
	avsqerror	0.003733531
	averror		0.06110263
	avsqscatter	0.003032221
	avscatter	0.05506561
	chisqr		0.7888265
	msq		0.002685246
	rms		0.05181936
	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
		3.837981
		0.02535437
		0.0664708
	errors	3
		0.08073025
		0.05371833
		0.05806206

# Fri 15:22:39 23-Apr-2004
begin	KFIT
	status	0	(Solution converged)
	variance	0.001483975
	stdeviation	0.0385224
	avsqerror	0.001482641
	averror		0.03850508
	avsqscatter	4.644887E-4
	avscatter	0.021552
	chisqr		1.0009
	msq		0.001377977
	rms		0.03712111
	reference	mK
	fitting		(J-JH-HK)+k1+k2*XK+k3*HK
	weights		photometric
	parameters	3
		k1	(fit)
		k2	(constant)
		k3	(fit)
	derivatives	3
		0.1
		0.1
		0.1
	values	3
		4.434642
		0.03
		-0.1682238
	errors	3
		0.01006497
		0.
		0.198944