The following table, courtesy of Dave Thompson, contains the UKIRT faint standard stars from Casali (1992 UKIRT Newsletter, 4, 33). Links on the names brings up a K' image 4 arcminutes square, with North up and East to the left. The standard star is indicated by the tick marks.

The K' magnitudes in the last column are interpolated. They should provide better numbers than assuming that the K magnitudes apply to data obtained with a K' filter.

Some modifications to the table have been made, for example notations on a number of stars that are double. A more up-to-date table of FS stars can be found at the Joint Astronomy Centre Web site, at

This latter site contains cross references, spectral types, optical photometry, etc.

**UKIRT Faint Infrared Standard Stars**
Star	Other name	R.A.	Dec.	K	H-K	J-K	K'
Star	Other name	(1950)		K	H-K	J-K	K'
FS 1	G158-100	00 31 22.7	-12 24 29	12.967 ± 0.021	0.081 ± 0.012	0.462 ± 0.011	12.944
FS 2	SA92-342	00 52 36.0	+00 26 58	10.466 ± 0.003	0.038 ± 0.003	0.247 ± 0.003	10.451
FS 3	Feige 1	01 01 46.6	+03 57 34	12.822 ± 0.007	-0.097 ± 0.007	-0.222 ± 0.011	12.811
FS 4	SA93-317	01 52 03.7	+00 28 20	10.264 ± 0.005	0.040 ± 0.007	0.292 ± 0.003	10.245
FS 5	Feige 16	01 52 04.7	-07 00 47	12.342 ± 0.006	-0.002 ± 0.004	-0.007 ± 0.004	12.342
FS 6	Feige 22	02 27 39.2	+05 02 34	13.374 ± 0.015	-0.069 ± 0.012	-0.135 ± 0.014	13.363
FS 7	SA94-242	02 54 47.2	+00 06 39	10.940 ± 0.005	0.037 ± 0.010	0.165 ± 0.012	10.935
FS 8	SA94-251	02 55 12.9	+00 04 04	8.313 ± 0.006	0.129 ± 0.004	0.766 ± 0.002	8.272
FS 9	SA94-702	02 55 38.8	+00 58 54	8.266 ± 0.006	0.016 ± 0.019	0.884 ± 0.003	8.222
FS 10	GD 50	03 46 17.4	-01 07 38	14.919 ± 0.072	0.016 ± 0.019	0.884 ± 0.003	14.920
FS 11	SA96-83	04 50 25.4	-00 19 34	11.278 ± 0.018	0.016 ± 0.019	0.076 ± 0.025	11.275
FS 12	GD 71	05 49 34.8	+15 52 3	13.898 ± 0.003	-0.091 ± 0.018	-0.217 ± 0.014	13.889
FS 13	SA97-249	05 54 33.8	+00 00 53	10.135 ± 0.003	0.047 ± 0.005	0.382 ± 0.002	10.108
FS 14	Rubin 149	07 21 41.2	-00 27 10	14.261 ± 0.012	-0.079 ± 0.020	-0.153 ± 0.005	14.249
FS 15	M67-I-48	08 48 21.9	+11 55 02	12.360 ± 0.021	0.060 ± 0.007	0.418 ± 0.008	12.334
FS 16	M67-IV-8	08 48 31.0	+12 00 36	12.631 ± 0.008	0.038 ± 0.005	0.340 ± 0.006	12.605
FS 17	M67-IV-27	08 48 35.4	+12 03 26	12.270 ± 0.007	0.073 ± 0.003	0.411 ± 0.007	12.250
FS 18	SA100-280	Do not use! See note!					10.499
FS 19	G162-66	10 31 14.5	-11 26 08	13.796 ± 0.025	-0.142 ± 0.047	-0.231 ± 0.021	13.769
FS 20	G163-50	11 05 27.6	-04 53 04	13.473 ± 0.017	-0.069 ± 0.012	-0.120 ± 0.015	13.461
FS 21	GD 140	11 34 27.6	+30 04 35	13.132 ± 0.004	-0.101 ± 0.037	-0.184 ± 0.033	13.115
FS 33	GD 153	12 54 35.1	+22 18 08	14.240 ± 0.016	-0.078 ± 0.024	-0.223 ± 0.010	14.236
FS 23	M3-193	13 39 25.7	+28 44 59	12.374 ± 0.000	0.072 ± 0.018	0.623 ± 0.004	12.328
FS 24	SA106-1024	Do not use! See note!					10.743
FS 25	SA107-1006	Do not use! See note!					9.727
FS 26	SA108-475	16 34 26.3	-00 28 39	7.972 ± 0.009	0.155 ± 0.006	0.858 ± 0.004	7.930
FS 27	M13-A14	16 38 54.2	+36 26 56	13.123 ± 0.018	0.058 ± 0.014	0.371 ± 0.013	13.102
FS 28	SA109-71	Do not use! See note!					10.598
FS 35	G21-15	18 24 44.5	+04 01 17	11.757 ± 0.017	0.089 ± 0.005	0.474 ± 0.008	11.735
FS 34	EG 141	20 39 41.9	-20 15 21	12.989 ± 0.011	-0.070 ± 0.009	-0.170 ± 0.008	12.982
FS 29	G93-48	21 49 53.0	+02 09 16	13.346 ± 0.024	-0.075 ± 0.012	-0.171 ± 0.011	13.337
FS 30	SA114-750	22 39 11.3	+00 56 55	12.015 ± 0.020	-0.036 ± 0.005	-0.092 ± 0.013	12.012
FS 31	GD 246	23 09 50.4	+10 30 46	14.039 ± 0.010	-0.120 ± 0.017	-0.241 ± 0.020	14.021
FS 32	Feige 108	23 13 38.2	-02 06 58	13.664 ± 0.012	-0.088 ± 0.015	-0.205 ± 0.011	13.654
Flux for magnitude 0 star				654 Jy	1049 Jy	1614 Jy

Notes: FS24 is apparently a variable star!
FS 18, 25, and 28 are double stars.

The values quoted above for the flux from a zero magnitude star are from Bessel & Brett (1988, PASP, 100, 1134), scaled to zero magnitude. Bessel & Brett quote fluxes for a 0.03 magnitude star.