Table 4: Astrometric data.
Single-image Mosaic

$<({\rm O{-}C})^{2}>^{\frac{1}{2}}$

ICRF MJD $\Delta\alpha*$ $\sigma_{\alpha*}$ $\Delta\delta$ $\sigma_{\delta}$ N $\Delta\alpha*$ $\sigma_{\alpha*}$ $\Delta\delta$ $\sigma_{\delta}$ N $c_{\alpha*}$ $c_{\delta}$ $\alpha*$ $\delta$ $r_{\alpha}$ $r_{\delta}$

name

mas mas mas

0312-770 52 648.02 -5 37 54 37 5 -41 18 11 23 10 53 91 58 33 1.18 0.72

0528-250 52 649.04 -4 17 -4 17 6 4 11 -11 10 14 31 20 20 35 0.53 1.00

0537-286 52 650.07 35 18 14 16 7 28 13 31 12 11 26 23 47 36 1.18 0.92

0629-418 52 649.11 38 39 31 33 4 30 9 -4 9 20 40 25 37 26 0.97 0.67

0646-306 52 648.09 -132 26 8 26 6 -44 7 9 6 31 35 36 35 33 1.00 1.03

0700-465 52 649.15 21 24 -17 23 9 -3 11 -1 9 23 38 27 46 33 0.92 0.80

0700-465 52 650.19 18 18 -3 18 10 8 12 -1 11 22 26 27 57 61 1.00 1.17

0743-673 52 648.17 128 22 -45 27 8 112 13 23 14 19 29 31 44 38 0.81 0.63

0823-223 52 649.18 -31 22 48 22 18 -28 9 25 10 46 26 28 57 69 0.90 1.06

1101-536 52 648.22 46 11 17 11 27 33 6 36 6 81 25 21 46 73 0.96 1.46

1104-445 52 648.25 -42 34 25 38 7 8 8 9 8 32 30 23 49 53 1.11 1.26

1105-680 52 648.28 32 8 29 8 33 25 5 4 5 88 27 27 67 54 1.46 1.20

1116-462 52 648.32 46 22 -52 22 9 22 7 -42 7 42 25 25 39 53 0.93 1.23

1116-462 52 650.35 40 21 -28 21 13 18 7 -26 7 42 26 30 45 51 1.07 1.19

1129-580 52 649.33 -43 13 33 13 22 -30 4 14 4 131 30 26 54 56 1.10 1.10

1144-379 52 649.29 12 30 -29 27 6 28 13 -51 11 16 30 29 39 43 0.76 1.02

All positional derived data are given in milliarcseconds [mas]. All ICRF positions are taken from Ma et al. (1998). $\alpha*$ stands for $\alpha{\rm cos}~\delta$ . Only results in the F filter are concerned. Column 1: ICRF quasar identification; Col. 2: Modified Julian Date of the observation; Cols. 3 and 5: positional differences from the astrometric analysis of the single central image, in the sense near-IR minus ICRF, in right ascension and declination, respectively; Cols. 4 and 6: precisions from the astrometric analysis of the single central image, of the observed near-IR positions of the ICRF quasars, in right ascension and declination, respectively; Col. 7: number of reference (UCAC2) stars used in the astrometric analysis of the single central images; Cols. 8 and 10: positional differences from the reduction in astrometry mode, in the sense near-IR minus ICRF, in right ascension and declination, respectively; Cols. 9 and 11: precisions of the observed near-IR positions in the astrometry mode of the ICRF quasars in right ascension and declination, respectively; Col. 12: number of reference (UCAC2) stars used in the astrometry mode; Cols. 13 and 14: internal precision as obtained from the positions of stars in overlapping regions, in right ascension and declination, respectively; Cols. 15 and 16: rms of the differences observed minus calculated to the reference (UCAC2) stars in the astrometry mode at the epoch of the observations, in right ascension and declination, respectively; Cols. 17 and 18: ratio between the values provided by Cols. 15 and 16 and the respective nominal standard deviations propagated to the epoch of the observations for the reference stars, in right ascension and declination, respectively.

**Table 4:** Astrometric data.
		Single-image		Mosaic
	$<({\rm O{-}C})^{2}>^{\frac{1}{2}}$
ICRF	MJD	$\Delta\alpha*$	$\sigma_{\alpha*}$	$\Delta\delta$	$\sigma_{\delta}$	N	$\Delta\alpha*$	$\sigma_{\alpha*}$	$\Delta\delta$	$\sigma_{\delta}$	N	$c_{\alpha*}$	$c_{\delta}$	$\alpha*$	$\delta$	$r_{\alpha}$	$r_{\delta}$
name
	mas		mas	mas
0312-770	52 648.02	-5	37	54	37	5	-41	18	11	23	10	53	91	58	33	1.18	0.72
0528-250	52 649.04	-4	17	-4	17	6	4	11	-11	10	14	31	20	20	35	0.53	1.00
0537-286	52 650.07	35	18	14	16	7	28	13	31	12	11	26	23	47	36	1.18	0.92
0629-418	52 649.11	38	39	31	33	4	30	9	-4	9	20	40	25	37	26	0.97	0.67
0646-306	52 648.09	-132	26	8	26	6	-44	7	9	6	31	35	36	35	33	1.00	1.03
0700-465	52 649.15	21	24	-17	23	9	-3	11	-1	9	23	38	27	46	33	0.92	0.80
0700-465	52 650.19	18	18	-3	18	10	8	12	-1	11	22	26	27	57	61	1.00	1.17
0743-673	52 648.17	128	22	-45	27	8	112	13	23	14	19	29	31	44	38	0.81	0.63
0823-223	52 649.18	-31	22	48	22	18	-28	9	25	10	46	26	28	57	69	0.90	1.06
1101-536	52 648.22	46	11	17	11	27	33	6	36	6	81	25	21	46	73	0.96	1.46
1104-445	52 648.25	-42	34	25	38	7	8	8	9	8	32	30	23	49	53	1.11	1.26
1105-680	52 648.28	32	8	29	8	33	25	5	4	5	88	27	27	67	54	1.46	1.20
1116-462	52 648.32	46	22	-52	22	9	22	7	-42	7	42	25	25	39	53	0.93	1.23
1116-462	52 650.35	40	21	-28	21	13	18	7	-26	7	42	26	30	45	51	1.07	1.19
1129-580	52 649.33	-43	13	33	13	22	-30	4	14	4	131	30	26	54	56	1.10	1.10
1144-379	52 649.29	12	30	-29	27	6	28	13	-51	11	16	30	29	39	43	0.76	1.02

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations
	3 Image analysis and data reduction
	4 Photometric results
	5 Astrometric results
	6 Discussion
	7 Conclusion
	References
	Online Material