11.4 The Standard Catalog

A catalog of standard magnitudes was compiled as follows: For the SA110-503 field and the PG1633+099 field, Johnson V, B, & U magnitudes were taken from Landolt (1992). B and U were calculated from the listed (B-V) and (U-B) as follows:

For the M67 field, Johnson V & B, and Gunn r magnitudes were taken from Jørgensen (1994). B was calculated from the listed (B-V) in the same way as for the Landolt stars, Eq. (

) and (

). U magnitudes were taken from Montgomery et al. (1993) for the 13 stars in common. U was calculated from the listed (B-V) and (U-B) in the same way as for the Landolt stars, Eq. (

), whereas the errors were somewhat arbitrarily set to 0.01 mag, since these authors do not list any errors. The stars were identified from Figure 7 in Montgomery et al. (1993), since these authors do not use the F or quadrant numbers. The established correspondence is shown in Table

Table: Catalog of standard star magnitudes

Star	GR	$\sigma$ (GR)	JV	$\sigma$ (JV)	JB	$\sigma$ (JB)	JU	$\sigma$ (JU)
SA110-496	12.763	0.007	13.004	0.003	14.044	0.006	14.781	0.023
SA110-497	13.889	0.007	14.196	0.005	15.248	0.006	15.628	0.014
SA110-499	11.497	0.007	11.737	0.003	12.724	0.003	13.363	0.007
SA110-502	11.440	0.008	12.330	0.003	14.656	0.005	16.982	0.023
SA110-503	11.756	0.007	11.773	0.003	12.444	0.003	12.950	0.005
SA110-504	13.629	0.007	14.022	0.001	15.270	0.006	16.593	0.027
SA110-506	11.349	0.007	11.312	0.002	11.880	0.002	11.939	0.006
SA110-507	12.208	0.007	12.440	0.005	13.581	0.006	14.411	0.006
PG1633+099	14.799	0.018	14.397	0.002	14.205	0.002	13.231	0.005
PG1633+099A	15.104	0.018	15.256	0.004	16.129	0.005	16.449	0.009
PG1633+099B	12.772	0.017	12.969	0.002	14.050	0.002	15.057	0.007
PG1633+099C	13.004	0.017	13.229	0.003	14.363	0.003	15.501	0.004
PG1633+099D	13.711	0.017	13.691	0.002	14.226	0.002	14.201	0.005
M67-F81	10.392	0.006	10.030	0.008	9.947	0.008	9.556	0.010
M67-F93/ I12	12.837	0.003	12.833	0.007	13.383	0.007	13.468	0.010
M67-F95	12.721	0.003	12.678	0.006	13.169	0.006	13.232	0.010
M67-F105	9.982	0.004	10.267	0.010	11.510	0.010	12.889	0.010
M67-F106/ I11	13.064	0.003	13.062	0.005	13.625	0.005	-	-
M67-F108	9.310	0.003	9.662	0.006	11.024	0.006	12.623	0.010
M67-F111	12.736	0.003	12.741	0.006	13.297	0.006	13.357	0.010
M67-F117	12.517	0.003	12.632	0.005	13.411	0.005	-	-
M67-F124	12.184	0.003	12.129	0.007	12.584	0.007	12.605	0.010
M67-F127	12.789	0.003	12.785	0.007	13.338	0.007	13.365	0.010
M67-F128/ I198	13.155	0.004	13.158	0.022	13.734	0.022	13.777	0.010
M67-F129/ I199	13.169	0.003	13.174	0.010	13.761	0.010	13.831	0.010
M67-F130	12.954	0.004	12.895	0.022	13.349	0.022	13.356	0.010
M67-F134	12.254	0.003	12.265	0.008	12.832	0.008	-	-
M67-F135	11.216	0.003	11.428	0.008	12.480	0.008	-	-
M67-F141	10.245	0.004	10.442	0.011	11.527	0.011	12.586	0.010
M67-F153	11.559	0.011	11.280	0.015	11.385	0.015	-	-
M67- I15	11.635	0.007	11.563	0.010	11.961	0.010	-	-
M67- I20	13.440	0.007	13.444	0.010	13.996	0.010	14.038	0.010
M67- I25	12.643	0.007	12.669	0.010	13.273	0.010	-	-
M67- I27	11.492	0.007	11.333	0.010	11.614	0.010	-	-
M67- I49	13.447	0.005	13.465	0.007	14.046	0.007	-	-
M67- II22	12.766	0.011	12.911	0.015	13.809	0.015	-	-

B	=	V + (B-V)	(11.7)
$\displaystyle \sigma(B)$	=	$\displaystyle \max \left\{ \sigma(V),\sigma((B-V)) \right\}$	(11.8)
U	=	V + (B-V) + (U-B)	(11.9)
$\displaystyle \sigma(U)$	=	$\displaystyle \max \left\{ \sigma(V),\sigma((B-V)),\sigma((U-B)) \right\}$	(11.10)