The K' filter does not have its own set of properly calibrated standard stars, despite its increasing use in astronomy.  We have thus interpolated the K' magnitudes from the JHK magnitudes as given in Casali (1992 UKIRT Newsletter, 4, 33), as listed in the previous table. All are listed in the table below for convenience.  The interpolated magnitudes seem to give reasonable, consistent results, though the numbers are given here without any express or implied guarantee as to their trustworthiness!

UKIRT Faint Infrared Standard Stars

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Name	J	H	K'	K
FS   1	13.429	13.048	12.944	12.967
FS   2	10.713	10.504	10.451	10.466
FS   3	12.600	12.725	12.811	12.822
FS   4	10.556	10.304	10.245	10.264
FS   5	12.335	12.340	12.342	12.342
FS   6	13.239	13.305	13.363	13.374
FS   7	11.105	10.977	10.935	10.940
FS   8	9.079	8.442	8.272	8.313
FS   9	9.150	8.424	8.222	8.266
FS 10	14.749	14.870	14.920	14.919
FS 11	11.354	11.294	11.275	11.278
FS 12	13.681	13.807	13.889	13.898
FS 13	10.517	10.182	10.108	10.135
FS 14	14.108	14.182	14.249	14.261
FS 15	12.778	12.420	12.334	12.360
FS 16	12.971	12.669	12.605	12.631
FS 17	12.681	12.343	12.250	12.270
FS 18	10.814	10.553	10.499	10.522
FS 19	13.565	13.654	13.769	13.796
FS 20	13.353	13.404	13.461	13.473
FS 21	12.948	13.031	13.115	13.132
FS 33	14.017	14.162	14.236	14.240
FS 23	12.997	12.446	12.328	12.374
FS 24	10.904	10.772	10.743	10.753
FS 25	10.231	9.826	9.727	9.756
FS 26	8.830	8.127	7.930	7.972
FS 27	13.494	13.181	13.102	13.123
FS 28	10.745	10.644	10.598	10.597
FS 35	12.231	11.846	11.735	11.757
FS 34	12.819	12.919	12.982	12.989
FS 29	13.175	13.271	13.337	13.346
FS 30	11.923	11.979	12.012	12.015
FS 31	13.798	13.919	14.021	14.039
FS 32	13.459	13.576	13.654	13.664

 FS 24 is apparently a variable star!