Version: 6.9 (Wed Apr 16 02:18:34 UTC 2008) Using 2745 Counts, Exposure [s]= 216034.25 XRT/SDSS Frame Offset: RA 0.500 , Dec 1.100 , 90% Conf. Error: 0.320 Using 56 X-ray Sources and 69 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 24.1 ; 90% Conf. ["]= 0.647 XRT/DSS Frame Offset: RA 0.500 , Dec 0.800 , 90% Conf. Error: 0.450 Using 56 X-ray Sources and 42 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 23.8 ; 90% Conf. ["]= 0.720 Version: 6.8 (Tue Apr 15 19:43:14 UTC 2008) Using 2744 Counts, Exposure [s]= 215547.84 XRT/SDSS Frame Offset: RA 0.500 , Dec 1.100 , 90% Conf. Error: 0.500 Using 56 X-ray Sources and 69 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 24.1 ; 90% Conf. ["]= 0.753 XRT/DSS Frame Offset: RA 0.300 , Dec 0.800 , 90% Conf. Error: 0.500 Using 56 X-ray Sources and 42 DSS Sources DSS Refined RA, Dec: 11 50 56.39 +57 09 23.8 ; 90% Conf. ["]= 0.753 Version: 6.7 (Tue Apr 15 17:35:40 UTC 2008) Using 2742 Counts, Exposure [s]= 214519.85 XRT/SDSS Frame Offset: RA 0.500 , Dec 1.100 , 90% Conf. Error: 0.430 Using 57 X-ray Sources and 72 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 24.1 ; 90% Conf. ["]= 0.708 XRT/DSS Frame Offset: RA 0.400 , Dec 0.800 , 90% Conf. Error: 0.450 Using 57 X-ray Sources and 43 DSS Sources DSS Refined RA, Dec: 11 50 56.39 +57 09 23.8 ; 90% Conf. ["]= 0.721 Version: 6.6 (Tue Apr 15 15:11:36 UTC 2008) Using 2743 Counts, Exposure [s]= 211353.15 XRT/SDSS Frame Offset: RA 0.500 , Dec 0.900 , 90% Conf. Error: 0.370 Using 58 X-ray Sources and 71 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 23.9 ; 90% Conf. ["]= 0.673 XRT/DSS Frame Offset: RA 0.600 , Dec 0.900 , 90% Conf. Error: 0.430 Using 58 X-ray Sources and 42 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 23.9 ; 90% Conf. ["]= 0.708 Version: 6.5 (Tue Apr 15 09:54:51 UTC 2008) Using 2741 Counts, Exposure [s]= 210024.30 XRT/SDSS Frame Offset: RA 0.500 , Dec 0.900 , 90% Conf. Error: 0.370 Using 57 X-ray Sources and 70 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 24.0 ; 90% Conf. ["]= 0.673 XRT/DSS Frame Offset: RA 0.700 , Dec 0.900 , 90% Conf. Error: 0.450 Using 57 X-ray Sources and 41 DSS Sources DSS Refined RA, Dec: 11 50 56.43 +57 09 24.0 ; 90% Conf. ["]= 0.720 Version: 6.4 (Tue Apr 15 07:46:50 UTC 2008) Using 2741 Counts, Exposure [s]= 209402.49 XRT/SDSS Frame Offset: RA 0.300 , Dec 1.000 , 90% Conf. Error: 0.370 Using 55 X-ray Sources and 66 SDSS Sources SDSS Refined RA, Dec: 11 50 56.39 +57 09 24.1 ; 90% Conf. ["]= 0.676 XRT/DSS Frame Offset: RA 0.500 , Dec 0.800 , 90% Conf. Error: 0.420 Using 55 X-ray Sources and 39 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 23.9 ; 90% Conf. ["]= 0.705 Version: 6.3 (Tue Apr 15 00:15:35 UTC 2008) Using 2741 Counts, Exposure [s]= 209258.90 XRT/SDSS Frame Offset: RA 0.200 , Dec 0.900 , 90% Conf. Error: 0.410 Using 56 X-ray Sources and 69 SDSS Sources SDSS Refined RA, Dec: 11 50 56.37 +57 09 24.0 ; 90% Conf. ["]= 0.700 XRT/DSS Frame Offset: RA 0.300 , Dec 0.700 , 90% Conf. Error: 0.430 Using 56 X-ray Sources and 40 DSS Sources DSS Refined RA, Dec: 11 50 56.38 +57 09 23.8 ; 90% Conf. ["]= 0.712 Version: 6.2 (Mon Apr 14 22:39:49 UTC 2008) Using 2741 Counts, Exposure [s]= 208544.33 XRT/SDSS Frame Offset: RA 0.100 , Dec 0.900 , 90% Conf. Error: 0.420 Using 57 X-ray Sources and 70 SDSS Sources SDSS Refined RA, Dec: 11 50 56.36 +57 09 24.0 ; 90% Conf. ["]= 0.706 XRT/DSS Frame Offset: RA 0.300 , Dec 0.700 , 90% Conf. Error: 0.430 Using 57 X-ray Sources and 41 DSS Sources DSS Refined RA, Dec: 11 50 56.39 +57 09 23.8 ; 90% Conf. ["]= 0.712 Version: 6.1 (Mon Apr 14 19:47:50 UTC 2008) Using 2741 Counts, Exposure [s]= 207804.77 XRT/SDSS Frame Offset: RA 0.400 , Dec 1.000 , 90% Conf. Error: 0.430 Using 56 X-ray Sources and 71 SDSS Sources SDSS Refined RA, Dec: 11 50 56.39 +57 09 24.1 ; 90% Conf. ["]= 0.713 XRT/DSS Frame Offset: RA 0.300 , Dec 0.700 , 90% Conf. Error: 0.420 Using 56 X-ray Sources and 41 DSS Sources DSS Refined RA, Dec: 11 50 56.38 +57 09 23.8 ; 90% Conf. ["]= 0.707 Version: 6.0 (Mon Apr 14 16:59:33 UTC 2008) Using 2740 Counts, Exposure [s]= 206651.32 XRT/SDSS Frame Offset: RA 0.500 , Dec 1.100 , 90% Conf. Error: 0.430 Using 55 X-ray Sources and 70 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 24.2 ; 90% Conf. ["]= 0.714 XRT/DSS Frame Offset: RA 0.300 , Dec 0.700 , 90% Conf. Error: 0.430 Using 55 X-ray Sources and 39 DSS Sources DSS Refined RA, Dec: 11 50 56.38 +57 09 23.8 ; 90% Conf. ["]= 0.714 Version: 5.9 (Mon Apr 14 13:35:00 UTC 2008) Using 2739 Counts, Exposure [s]= 201639.25 XRT/SDSS Frame Offset: RA 0.700 , Dec 1.300 , 90% Conf. Error: 0.510 Using 53 X-ray Sources and 66 SDSS Sources SDSS Refined RA, Dec: 11 50 56.44 +57 09 24.5 ; 90% Conf. ["]= 0.762 XRT/DSS Frame Offset: RA 0.500 , Dec 0.800 , 90% Conf. Error: 0.420 Using 53 X-ray Sources and 38 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 24.0 ; 90% Conf. ["]= 0.705 Version: 5.8 (Mon Apr 14 08:26:59 UTC 2008) Using 2739 Counts, Exposure [s]= 201371.21 XRT/SDSS Frame Offset: RA 0.700 , Dec 1.300 , 90% Conf. Error: 0.510 Using 53 X-ray Sources and 66 SDSS Sources SDSS Refined RA, Dec: 11 50 56.44 +57 09 24.4 ; 90% Conf. ["]= 0.762 XRT/DSS Frame Offset: RA 0.500 , Dec 0.800 , 90% Conf. Error: 0.420 Using 53 X-ray Sources and 38 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 23.9 ; 90% Conf. ["]= 0.705 Version: 5.7 (Mon Mar 31 04:19:01 UTC 2008) Using 2615 Counts, Exposure [s]= 104537.42 XRT/SDSS Frame Offset: RA 0.400 , Dec 1.400 , 90% Conf. Error: 0.650 Using 29 X-ray Sources and 38 SDSS Sources SDSS Refined RA, Dec: 11 50 56.43 +57 09 24.0 ; 90% Conf. ["]= 0.898 XRT/DSS Frame Offset: RA 1.100 , Dec 3.000 , 90% Conf. Error: 3.570 Using 29 X-ray Sources and 22 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 25.6 ; 90% Conf. ["]= 3.623 Version: 5.6 (Mon Mar 31 01:50:36 UTC 2008) Using 2615 Counts, Exposure [s]= 103895.55 XRT/SDSS Frame Offset: RA 0.000 , Dec 1.000 , 90% Conf. Error: 2.510 Using 30 X-ray Sources and 40 SDSS Sources SDSS Refined RA, Dec: 11 50 56.37 +57 09 23.7 ; 90% Conf. ["]= 2.584 XRT/DSS Frame Offset: RA 0.500 , Dec 1.200 , 90% Conf. Error: 2.600 Using 30 X-ray Sources and 23 DSS Sources DSS Refined RA, Dec: 11 50 56.44 +57 09 23.9 ; 90% Conf. ["]= 2.672 Version: 5.5 (Sun Mar 30 23:54:02 UTC 2008) Using 2615 Counts, Exposure [s]= 102447.92 XRT/SDSS Frame Offset: RA 0.000 , Dec 1.000 , 90% Conf. Error: 0.540 Using 27 X-ray Sources and 36 SDSS Sources SDSS Refined RA, Dec: 11 50 56.38 +57 09 23.7 ; 90% Conf. ["]= 0.827 XRT/DSS Frame Offset: RA 1.400 , Dec 3.700 , 90% Conf. Error: 3.670 Using 27 X-ray Sources and 20 DSS Sources DSS Refined RA, Dec: 11 50 56.55 +57 09 26.4 ; 90% Conf. ["]= 3.723 Version: 5.4 (Sun Mar 30 21:51:32 UTC 2008) Using 2608 Counts, Exposure [s]= 99673.30 XRT/SDSS Frame Offset: RA 0.300 , Dec 1.200 , 90% Conf. Error: 0.650 Using 26 X-ray Sources and 35 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 23.8 ; 90% Conf. ["]= 0.920 XRT/DSS Frame Offset: RA 0.300 , Dec 0.600 , 90% Conf. Error: 2.510 Using 26 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.40 +57 09 23.2 ; 90% Conf. ["]= 2.593 Version: 5.3 (Sun Mar 30 14:16:31 UTC 2008) Using 2605 Counts, Exposure [s]= 98269.22 XRT/SDSS Frame Offset: RA 0.900 , Dec 3.700 , 90% Conf. Error: 0.830 Using 27 X-ray Sources and 34 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 26.5 ; 90% Conf. ["]= 1.037 XRT/DSS Frame Offset: RA 1.100 , Dec 3.200 , 90% Conf. Error: 0.990 Using 27 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 26.0 ; 90% Conf. ["]= 1.169 Version: 5.2 (Sun Mar 30 07:13:58 UTC 2008) Using 2605 Counts, Exposure [s]= 97567.18 XRT/SDSS Frame Offset: RA 0.600 , Dec 3.000 , 90% Conf. Error: 1.620 Using 27 X-ray Sources and 34 SDSS Sources SDSS Refined RA, Dec: 11 50 56.45 +57 09 25.7 ; 90% Conf. ["]= 1.736 XRT/DSS Frame Offset: RA 1.100 , Dec 3.200 , 90% Conf. Error: 0.950 Using 27 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 25.9 ; 90% Conf. ["]= 1.137 Version: 5.1 (Sun Mar 30 03:24:27 UTC 2008) Using 2604 Counts, Exposure [s]= 96865.14 XRT/SDSS Frame Offset: RA 1.000 , Dec 3.600 , 90% Conf. Error: 0.640 Using 24 X-ray Sources and 29 SDSS Sources SDSS Refined RA, Dec: 11 50 56.49 +57 09 26.3 ; 90% Conf. ["]= 0.904 XRT/DSS Frame Offset: RA 1.300 , Dec 3.500 , 90% Conf. Error: 0.540 Using 24 X-ray Sources and 18 DSS Sources DSS Refined RA, Dec: 11 50 56.53 +57 09 26.2 ; 90% Conf. ["]= 0.836 Version: 5.0 (Sun Mar 30 01:23:05 UTC 2008) Using 2604 Counts, Exposure [s]= 96163.11 XRT/SDSS Frame Offset: RA 0.900 , Dec 3.600 , 90% Conf. Error: 0.640 Using 24 X-ray Sources and 29 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 26.3 ; 90% Conf. ["]= 0.903 XRT/DSS Frame Offset: RA 1.300 , Dec 3.600 , 90% Conf. Error: 0.540 Using 24 X-ray Sources and 18 DSS Sources DSS Refined RA, Dec: 11 50 56.53 +57 09 26.3 ; 90% Conf. ["]= 0.835 Version: 4.9 (Sat Mar 29 14:33:49 UTC 2008) Using 2592 Counts, Exposure [s]= 88275.18 XRT/SDSS Frame Offset: RA 0.200 , Dec 1.100 , 90% Conf. Error: 0.610 Using 26 X-ray Sources and 34 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 24.0 ; 90% Conf. ["]= 0.875 XRT/DSS Frame Offset: RA 0.300 , Dec 0.700 , 90% Conf. Error: 2.820 Using 26 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 23.6 ; 90% Conf. ["]= 2.889 Version: 4.8 (Sat Mar 29 12:36:29 UTC 2008) Using 2590 Counts, Exposure [s]= 87272.26 XRT/SDSS Frame Offset: RA 0.200 , Dec 1.100 , 90% Conf. Error: 0.590 Using 26 X-ray Sources and 34 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 24.0 ; 90% Conf. ["]= 0.862 XRT/DSS Frame Offset: RA 0.300 , Dec 0.700 , 90% Conf. Error: 2.820 Using 26 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 23.6 ; 90% Conf. ["]= 2.889 Version: 4.7 (Sat Mar 29 06:00:49 UTC 2008) Using 2588 Counts, Exposure [s]= 86271.86 XRT/SDSS Frame Offset: RA 0.700 , Dec 3.400 , 90% Conf. Error: 0.500 Using 24 X-ray Sources and 33 SDSS Sources SDSS Refined RA, Dec: 11 50 56.49 +57 09 26.3 ; 90% Conf. ["]= 0.801 XRT/DSS Frame Offset: RA 1.000 , Dec 3.400 , 90% Conf. Error: 2.630 Using 24 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.52 +57 09 26.3 ; 90% Conf. ["]= 2.703 Version: 4.6 (Sat Mar 29 03:48:58 UTC 2008) Using 2588 Counts, Exposure [s]= 86169.06 XRT/SDSS Frame Offset: RA 0.700 , Dec 3.400 , 90% Conf. Error: 0.500 Using 24 X-ray Sources and 33 SDSS Sources SDSS Refined RA, Dec: 11 50 56.49 +57 09 26.3 ; 90% Conf. ["]= 0.803 XRT/DSS Frame Offset: RA 1.000 , Dec 3.400 , 90% Conf. Error: 0.900 Using 24 X-ray Sources and 21 DSS Sources DSS Refined RA, Dec: 11 50 56.53 +57 09 26.3 ; 90% Conf. ["]= 1.097 Version: 4.5 (Sat Mar 29 01:33:54 UTC 2008) Using 2588 Counts, Exposure [s]= 85258.91 XRT/SDSS Frame Offset: RA 0.200 , Dec 0.800 , 90% Conf. Error: 2.550 Using 23 X-ray Sources and 32 SDSS Sources SDSS Refined RA, Dec: 11 50 56.42 +57 09 23.7 ; 90% Conf. ["]= 2.627 XRT/DSS Frame Offset: RA 0.500 , Dec 1.100 , 90% Conf. Error: 2.060 Using 23 X-ray Sources and 20 DSS Sources DSS Refined RA, Dec: 11 50 56.45 +57 09 24.0 ; 90% Conf. ["]= 2.155 Version: 4.4 (Fri Mar 28 09:48:07 UTC 2008) Using 2585 Counts, Exposure [s]= 83857.34 XRT/SDSS Frame Offset: RA 0.200 , Dec 0.700 , 90% Conf. Error: 1.000 Using 20 X-ray Sources and 28 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 23.6 ; 90% Conf. ["]= 1.194 XRT/DSS Frame Offset: RA 0.300 , Dec 0.900 , 90% Conf. Error: 2.230 Using 20 X-ray Sources and 17 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 23.8 ; 90% Conf. ["]= 2.323 Version: 4.3 (Fri Mar 28 06:42:29 UTC 2008) Using 2582 Counts, Exposure [s]= 82458.28 XRT/SDSS Frame Offset: RA 0.800 , Dec 3.300 , 90% Conf. Error: 2.920 Using 19 X-ray Sources and 27 SDSS Sources SDSS Refined RA, Dec: 11 50 56.47 +57 09 26.1 ; 90% Conf. ["]= 2.994 XRT/DSS Frame Offset: RA 1.100 , Dec 3.200 , 90% Conf. Error: 0.850 Using 19 X-ray Sources and 16 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 26.0 ; 90% Conf. ["]= 1.077 Version: 4.2 (Fri Mar 28 04:20:13 UTC 2008) Using 2580 Counts, Exposure [s]= 81758.75 XRT/SDSS Frame Offset: RA 0.500 , Dec 1.200 , 90% Conf. Error: 2.110 Using 20 X-ray Sources and 28 SDSS Sources SDSS Refined RA, Dec: 11 50 56.44 +57 09 24.0 ; 90% Conf. ["]= 2.209 XRT/DSS Frame Offset: RA 1.100 , Dec 3.200 , 90% Conf. Error: 0.830 Using 20 X-ray Sources and 16 DSS Sources DSS Refined RA, Dec: 11 50 56.52 +57 09 26.0 ; 90% Conf. ["]= 1.057 Version: 4.1 (Fri Mar 28 02:01:26 UTC 2008) Using 2577 Counts, Exposure [s]= 81056.71 XRT/SDSS Frame Offset: RA 0.400 , Dec 2.000 , 90% Conf. Error: 1.440 Using 19 X-ray Sources and 27 SDSS Sources SDSS Refined RA, Dec: 11 50 56.42 +57 09 24.7 ; 90% Conf. ["]= 1.585 XRT/DSS Frame Offset: RA 1.100 , Dec 3.200 , 90% Conf. Error: 0.770 Using 19 X-ray Sources and 16 DSS Sources DSS Refined RA, Dec: 11 50 56.50 +57 09 25.9 ; 90% Conf. ["]= 1.015 Version: 4.0 (Thu Mar 27 15:19:49 UTC 2008) Using 2568 Counts, Exposure [s]= 75731.24 XRT/SDSS Frame Offset: RA 0.100 , Dec 1.700 , 90% Conf. Error: 1.930 Using 17 X-ray Sources and 21 SDSS Sources SDSS Refined RA, Dec: 11 50 56.37 +57 09 24.4 ; 90% Conf. ["]= 2.031 XRT/DSS Frame Offset: RA 0.800 , Dec 3.300 , 90% Conf. Error: 2.120 Using 17 X-ray Sources and 14 DSS Sources DSS Refined RA, Dec: 11 50 56.46 +57 09 26.0 ; 90% Conf. ["]= 2.212 Version: 3.9 (Thu Mar 27 13:00:12 UTC 2008) Using 2565 Counts, Exposure [s]= 74211.82 XRT/SDSS Frame Offset: RA 0.000 , Dec 1.700 , 90% Conf. Error: 0.790 Using 20 X-ray Sources and 25 SDSS Sources SDSS Refined RA, Dec: 11 50 56.39 +57 09 24.5 ; 90% Conf. ["]= 1.008 XRT/DSS Frame Offset: RA 0.100 , Dec 1.600 , 90% Conf. Error: 1.560 Using 20 X-ray Sources and 15 DSS Sources DSS Refined RA, Dec: 11 50 56.40 +57 09 24.4 ; 90% Conf. ["]= 1.681 Version: 3.8 (Thu Mar 27 10:38:04 UTC 2008) Using 2565 Counts, Exposure [s]= 73449.61 XRT/SDSS Frame Offset: RA -0.100 , Dec 1.600 , 90% Conf. Error: 0.680 Using 19 X-ray Sources and 22 SDSS Sources SDSS Refined RA, Dec: 11 50 56.38 +57 09 24.3 ; 90% Conf. ["]= 0.928 XRT/DSS Frame Offset: RA 0.000 , Dec 1.600 , 90% Conf. Error: 1.710 Using 19 X-ray Sources and 14 DSS Sources DSS Refined RA, Dec: 11 50 56.39 +57 09 24.3 ; 90% Conf. ["]= 1.823 Version: 3.7 (Thu Mar 27 03:51:15 UTC 2008) Using 2557 Counts, Exposure [s]= 71170.48 XRT/SDSS Frame Offset: RA -0.300 , Dec 1.600 , 90% Conf. Error: 0.590 Using 20 X-ray Sources and 25 SDSS Sources SDSS Refined RA, Dec: 11 50 56.35 +57 09 24.3 ; 90% Conf. ["]= 0.872 XRT/DSS Frame Offset: RA -0.300 , Dec 1.500 , 90% Conf. Error: 1.650 Using 20 X-ray Sources and 15 DSS Sources DSS Refined RA, Dec: 11 50 56.35 +57 09 24.2 ; 90% Conf. ["]= 1.770 Version: 3.6 (Wed Mar 26 15:46:01 UTC 2008) Using 2541 Counts, Exposure [s]= 65787.35 XRT/SDSS Frame Offset: RA 0.200 , Dec 1.500 , 90% Conf. Error: 0.570 Using 16 X-ray Sources and 21 SDSS Sources SDSS Refined RA, Dec: 11 50 56.43 +57 09 23.9 ; 90% Conf. ["]= 0.877 XRT/DSS Frame Offset: RA 0.300 , Dec 1.100 , 90% Conf. Error: 0.610 Using 16 X-ray Sources and 13 DSS Sources DSS Refined RA, Dec: 11 50 56.44 +57 09 23.5 ; 90% Conf. ["]= 0.904 Version: 3.5 (Wed Mar 26 12:52:14 UTC 2008) Using 2536 Counts, Exposure [s]= 64267.93 XRT/SDSS Frame Offset: RA 0.100 , Dec 1.600 , 90% Conf. Error: 0.570 Using 19 X-ray Sources and 24 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 24.0 ; 90% Conf. ["]= 0.857 XRT/DSS Frame Offset: RA 0.200 , Dec 1.200 , 90% Conf. Error: 0.610 Using 19 X-ray Sources and 15 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 23.6 ; 90% Conf. ["]= 0.884 Version: 3.4 (Wed Mar 26 04:10:16 UTC 2008) Using 2527 Counts, Exposure [s]= 61762.68 XRT/SDSS Frame Offset: RA 0.300 , Dec 1.400 , 90% Conf. Error: 2.790 Using 17 X-ray Sources and 21 SDSS Sources SDSS Refined RA, Dec: 11 50 56.43 +57 09 23.9 ; 90% Conf. ["]= 2.865 XRT/DSS Frame Offset: RA 0.400 , Dec 1.100 , 90% Conf. Error: 0.650 Using 17 X-ray Sources and 14 DSS Sources DSS Refined RA, Dec: 11 50 56.44 +57 09 23.6 ; 90% Conf. ["]= 0.921 Version: 3.3 (Wed Mar 26 01:28:36 UTC 2008) Using 2526 Counts, Exposure [s]= 61514.97 XRT/SDSS Frame Offset: RA 0.200 , Dec 1.400 , 90% Conf. Error: 3.110 Using 17 X-ray Sources and 21 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 23.9 ; 90% Conf. ["]= 3.177 XRT/DSS Frame Offset: RA 0.200 , Dec 1.000 , 90% Conf. Error: 0.710 Using 17 X-ray Sources and 14 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 23.5 ; 90% Conf. ["]= 0.963 Version: 3.2 (Wed Mar 26 00:02:36 UTC 2008) Using 2519 Counts, Exposure [s]= 59102.96 XRT/SDSS Frame Offset: RA 0.500 , Dec 1.500 , 90% Conf. Error: 0.710 Using 18 X-ray Sources and 22 SDSS Sources SDSS Refined RA, Dec: 11 50 56.43 +57 09 24.1 ; 90% Conf. ["]= 0.965 XRT/DSS Frame Offset: RA 0.600 , Dec 1.300 , 90% Conf. Error: 0.710 Using 18 X-ray Sources and 15 DSS Sources DSS Refined RA, Dec: 11 50 56.44 +57 09 23.9 ; 90% Conf. ["]= 0.965 Version: 3.1 (Tue Mar 25 21:55:27 UTC 2008) Version: 3.0 (Tue Mar 25 18:25:38 UTC 2008) Using 2512 Counts, Exposure [s]= 57149.78 XRT/SDSS Frame Offset: RA 0.700 , Dec 2.300 , 90% Conf. Error: 0.540 Using 17 X-ray Sources and 22 SDSS Sources SDSS Refined RA, Dec: 11 50 56.45 +57 09 24.8 ; 90% Conf. ["]= 0.856 XRT/DSS Frame Offset: RA 0.600 , Dec 2.000 , 90% Conf. Error: 1.570 Using 17 X-ray Sources and 14 DSS Sources DSS Refined RA, Dec: 11 50 56.44 +57 09 24.5 ; 90% Conf. ["]= 1.705 Version: 2.9 (Tue Mar 25 15:52:00 UTC 2008) Using 2509 Counts, Exposure [s]= 56450.25 XRT/SDSS Frame Offset: RA 0.800 , Dec 2.600 , 90% Conf. Error: 0.640 Using 17 X-ray Sources and 22 SDSS Sources SDSS Refined RA, Dec: 11 50 56.46 +57 09 25.1 ; 90% Conf. ["]= 0.924 XRT/DSS Frame Offset: RA 0.900 , Dec 2.500 , 90% Conf. Error: 1.590 Using 17 X-ray Sources and 14 DSS Sources DSS Refined RA, Dec: 11 50 56.47 +57 09 25.0 ; 90% Conf. ["]= 1.724 Version: 2.8 (Tue Mar 25 13:22:53 UTC 2008) Using 2507 Counts, Exposure [s]= 55748.21 XRT/SDSS Frame Offset: RA 0.800 , Dec 2.700 , 90% Conf. Error: 0.650 Using 18 X-ray Sources and 22 SDSS Sources SDSS Refined RA, Dec: 11 50 56.47 +57 09 25.1 ; 90% Conf. ["]= 0.918 XRT/DSS Frame Offset: RA 0.900 , Dec 2.500 , 90% Conf. Error: 1.080 Using 18 X-ray Sources and 13 DSS Sources DSS Refined RA, Dec: 11 50 56.49 +57 09 24.9 ; 90% Conf. ["]= 1.259 Version: 2.7 (Tue Mar 25 08:34:35 UTC 2008) Using 2501 Counts, Exposure [s]= 52949.06 XRT/SDSS Frame Offset: RA 0.400 , Dec 3.200 , 90% Conf. Error: 0.730 Using 16 X-ray Sources and 19 SDSS Sources SDSS Refined RA, Dec: 11 50 56.42 +57 09 25.7 ; 90% Conf. ["]= 0.985 XRT/DSS Frame Offset: RA 1.100 , Dec 3.400 , 90% Conf. Error: 3.110 Using 16 X-ray Sources and 12 DSS Sources DSS Refined RA, Dec: 11 50 56.50 +57 09 25.9 ; 90% Conf. ["]= 3.180 Version: 2.6 (Tue Mar 25 04:26:14 UTC 2008) Using 2500 Counts, Exposure [s]= 52250.55 XRT/SDSS Frame Offset: RA 0.500 , Dec 3.300 , 90% Conf. Error: 0.730 Using 15 X-ray Sources and 19 SDSS Sources SDSS Refined RA, Dec: 11 50 56.44 +57 09 25.7 ; 90% Conf. ["]= 0.989 XRT/DSS Frame Offset: RA 1.100 , Dec 3.300 , 90% Conf. Error: 2.930 Using 15 X-ray Sources and 12 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 25.7 ; 90% Conf. ["]= 3.005 Version: 2.5 (Mon Mar 24 17:22:36 UTC 2008) Using 2480 Counts, Exposure [s]= 48248.93 XRT/SDSS Frame Offset: RA 0.700 , Dec 3.400 , 90% Conf. Error: 0.640 Using 12 X-ray Sources and 17 SDSS Sources SDSS Refined RA, Dec: 11 50 56.47 +57 09 25.6 ; 90% Conf. ["]= 0.949 XRT/DSS Frame Offset: RA 0.900 , Dec 3.100 , 90% Conf. Error: 1.110 Using 12 X-ray Sources and 10 DSS Sources DSS Refined RA, Dec: 11 50 56.50 +57 09 25.3 ; 90% Conf. ["]= 1.313 Version: 2.4 (Mon Mar 24 15:04:42 UTC 2008) Using 2479 Counts, Exposure [s]= 47581.99 XRT/SDSS Frame Offset: RA 0.800 , Dec 3.200 , 90% Conf. Error: 0.510 Using 12 X-ray Sources and 17 SDSS Sources SDSS Refined RA, Dec: 11 50 56.47 +57 09 25.4 ; 90% Conf. ["]= 0.877 XRT/DSS Frame Offset: RA 1.100 , Dec 3.000 , 90% Conf. Error: 0.730 Using 12 X-ray Sources and 10 DSS Sources DSS Refined RA, Dec: 11 50 56.50 +57 09 25.2 ; 90% Conf. ["]= 1.020 Version: 2.3 (Mon Mar 24 13:02:51 UTC 2008) Using 2477 Counts, Exposure [s]= 46915.06 XRT/SDSS Frame Offset: RA 0.800 , Dec 3.300 , 90% Conf. Error: 0.510 Using 12 X-ray Sources and 17 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 25.5 ; 90% Conf. ["]= 0.872 XRT/DSS Frame Offset: RA 1.100 , Dec 3.100 , 90% Conf. Error: 0.730 Using 12 X-ray Sources and 10 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 25.3 ; 90% Conf. ["]= 1.016 Version: 2.2 (Mon Mar 24 11:00:00 UTC 2008) Using 2474 Counts, Exposure [s]= 46248.12 XRT/SDSS Frame Offset: RA 0.900 , Dec 3.300 , 90% Conf. Error: 0.810 Using 12 X-ray Sources and 17 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 25.3 ; 90% Conf. ["]= 1.073 XRT/DSS Frame Offset: RA 1.100 , Dec 3.000 , 90% Conf. Error: 0.810 Using 12 X-ray Sources and 10 DSS Sources DSS Refined RA, Dec: 11 50 56.51 +57 09 25.0 ; 90% Conf. ["]= 1.073 Version: 2.1 (Mon Mar 24 09:00:07 UTC 2008) Using 2474 Counts, Exposure [s]= 45580.31 XRT/SDSS Frame Offset: RA 0.800 , Dec 3.300 , 90% Conf. Error: 0.540 Using 12 X-ray Sources and 17 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 25.4 ; 90% Conf. ["]= 0.893 XRT/DSS Frame Offset: RA 1.100 , Dec 3.100 , 90% Conf. Error: 0.790 Using 12 X-ray Sources and 10 DSS Sources DSS Refined RA, Dec: 11 50 56.52 +57 09 25.2 ; 90% Conf. ["]= 1.063 Version: 2.0 (Mon Mar 24 06:45:23 UTC 2008) Using 2471 Counts, Exposure [s]= 44906.72 XRT/SDSS Frame Offset: RA 0.800 , Dec 3.400 , 90% Conf. Error: 1.030 Using 11 X-ray Sources and 16 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 25.4 ; 90% Conf. ["]= 1.249 XRT/DSS Frame Offset: RA 1.000 , Dec 3.200 , 90% Conf. Error: 1.290 Using 11 X-ray Sources and 9 DSS Sources DSS Refined RA, Dec: 11 50 56.50 +57 09 25.2 ; 90% Conf. ["]= 1.471 Version: 1.9 (Mon Mar 24 04:23:20 UTC 2008) Using 2466 Counts, Exposure [s]= 44239.79 XRT/SDSS Frame Offset: RA 0.700 , Dec 3.500 , 90% Conf. Error: 0.830 Using 9 X-ray Sources and 14 SDSS Sources SDSS Refined RA, Dec: 11 50 56.44 +57 09 25.5 ; 90% Conf. ["]= 1.091 XRT/DSS Frame Offset: RA 1.000 , Dec 3.300 , 90% Conf. Error: 1.050 Using 9 X-ray Sources and 8 DSS Sources DSS Refined RA, Dec: 11 50 56.48 +57 09 25.3 ; 90% Conf. ["]= 1.266 Version: 1.8 (Mon Mar 24 02:23:36 UTC 2008) Using 2461 Counts, Exposure [s]= 43572.85 XRT/SDSS Frame Offset: RA 0.900 , Dec 3.500 , 90% Conf. Error: 0.650 Using 10 X-ray Sources and 15 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 25.5 ; 90% Conf. ["]= 0.951 XRT/DSS Frame Offset: RA 1.100 , Dec 3.100 , 90% Conf. Error: 0.710 Using 10 X-ray Sources and 8 DSS Sources DSS Refined RA, Dec: 11 50 56.50 +57 09 25.1 ; 90% Conf. ["]= 0.993 Version: 1.7 (Sun Mar 23 19:44:30 UTC 2008) Using 2440 Counts, Exposure [s]= 39571.23 XRT/SDSS Frame Offset: RA 0.700 , Dec 5.900 , 90% Conf. Error: 0.810 Using 10 X-ray Sources and 15 SDSS Sources SDSS Refined RA, Dec: 11 50 56.48 +57 09 27.3 ; 90% Conf. ["]= 1.085 XRT/DSS Frame Offset: RA 1.400 , Dec 5.900 , 90% Conf. Error: 1.050 Using 10 X-ray Sources and 9 DSS Sources DSS Refined RA, Dec: 11 50 56.56 +57 09 27.3 ; 90% Conf. ["]= 1.274 Version: 1.6 (Sun Mar 23 13:42:10 UTC 2008) Using 2435 Counts, Exposure [s]= 38904.30 XRT/SDSS Frame Offset: RA 1.000 , Dec 5.600 , 90% Conf. Error: 1.300 Using 11 X-ray Sources and 16 SDSS Sources SDSS Refined RA, Dec: 11 50 56.49 +57 09 27.4 ; 90% Conf. ["]= 1.485 XRT/DSS Frame Offset: RA 1.400 , Dec 5.500 , 90% Conf. Error: 0.810 Using 11 X-ray Sources and 9 DSS Sources DSS Refined RA, Dec: 11 50 56.54 +57 09 27.3 ; 90% Conf. ["]= 1.082 Version: 1.5 (Sun Mar 23 05:41:12 UTC 2008) Using 2435 Counts, Exposure [s]= 38899.29 XRT/SDSS Frame Offset: RA 1.000 , Dec 5.600 , 90% Conf. Error: 1.300 Using 11 X-ray Sources and 16 SDSS Sources SDSS Refined RA, Dec: 11 50 56.49 +57 09 27.4 ; 90% Conf. ["]= 1.485 XRT/DSS Frame Offset: RA 1.400 , Dec 5.500 , 90% Conf. Error: 0.810 Using 11 X-ray Sources and 9 DSS Sources DSS Refined RA, Dec: 11 50 56.54 +57 09 27.3 ; 90% Conf. ["]= 1.082 Version: 1.4 (Sat Mar 22 19:00:27 UTC 2008) Using 2414 Counts, Exposure [s]= 36859.82 XRT/SDSS Frame Offset: RA 0.100 , Dec 2.900 , 90% Conf. Error: 3.520 Using 10 X-ray Sources and 15 SDSS Sources SDSS Refined RA, Dec: 11 50 56.37 +57 09 25.2 ; 90% Conf. ["]= 3.603 XRT/DSS Frame Offset: RA 0.500 , Dec 0.200 , 90% Conf. Error: 3.210 Using 10 X-ray Sources and 8 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 22.5 ; 90% Conf. ["]= 3.300 Version: 1.3 (Sat Mar 22 17:04:07 UTC 2008) Using 2412 Counts, Exposure [s]= 36140.23 XRT/SDSS Frame Offset: RA -0.100 , Dec 3.900 , 90% Conf. Error: 0.730 Using 10 X-ray Sources and 15 SDSS Sources SDSS Refined RA, Dec: 11 50 56.35 +57 09 26.3 ; 90% Conf. ["]= 1.076 XRT/DSS Frame Offset: RA -0.400 , Dec 3.200 , 90% Conf. Error: 3.840 Using 10 X-ray Sources and 8 DSS Sources DSS Refined RA, Dec: 11 50 56.31 +57 09 25.6 ; 90% Conf. ["]= 3.921 Version: 1.2 (Sat Mar 22 15:03:46 UTC 2008) Using 2408 Counts, Exposure [s]= 35420.64 XRT/SDSS Frame Offset: RA -0.100 , Dec 3.900 , 90% Conf. Error: 0.730 Using 10 X-ray Sources and 15 SDSS Sources SDSS Refined RA, Dec: 11 50 56.35 +57 09 26.3 ; 90% Conf. ["]= 1.076 XRT/DSS Frame Offset: RA -0.400 , Dec 3.200 , 90% Conf. Error: 3.840 Using 10 X-ray Sources and 8 DSS Sources DSS Refined RA, Dec: 11 50 56.31 +57 09 25.6 ; 90% Conf. ["]= 3.920 Version: 1.1 (Sat Mar 22 13:02:31 UTC 2008) Using 2402 Counts, Exposure [s]= 34701.05 XRT/SDSS Frame Offset: RA 0.500 , Dec 3.500 , 90% Conf. Error: 0.930 Using 10 X-ray Sources and 15 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 26.0 ; 90% Conf. ["]= 1.202 XRT/DSS Frame Offset: RA 0.600 , Dec 2.900 , 90% Conf. Error: 0.860 Using 10 X-ray Sources and 8 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 25.4 ; 90% Conf. ["]= 1.148 Version: 1.0 (Sat Mar 22 11:03:21 UTC 2008) Using 2396 Counts, Exposure [s]= 33981.46 XRT/SDSS Frame Offset: RA 0.400 , Dec 3.500 , 90% Conf. Error: 0.790 Using 8 X-ray Sources and 12 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 25.8 ; 90% Conf. ["]= 1.103 XRT/DSS Frame Offset: RA 0.400 , Dec 2.800 , 90% Conf. Error: 0.930 Using 8 X-ray Sources and 6 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 25.1 ; 90% Conf. ["]= 1.207 Version: 0.9 (Sat Mar 22 06:44:43 UTC 2008) Using 2374 Counts, Exposure [s]= 31822.68 XRT/SDSS Frame Offset: RA 0.300 , Dec 3.400 , 90% Conf. Error: 0.810 Using 8 X-ray Sources and 12 SDSS Sources SDSS Refined RA, Dec: 11 50 56.39 +57 09 25.1 ; 90% Conf. ["]= 1.120 XRT/DSS Frame Offset: RA 0.300 , Dec 2.800 , 90% Conf. Error: 1.010 Using 8 X-ray Sources and 6 DSS Sources DSS Refined RA, Dec: 11 50 56.39 +57 09 24.5 ; 90% Conf. ["]= 1.272 Version: 0.8 (Sat Mar 22 02:36:03 UTC 2008) Using 2314 Counts, Exposure [s]= 27230.66 XRT/SDSS Frame Offset: RA 0.100 , Dec 3.300 , 90% Conf. Error: 1.300 Using 5 X-ray Sources and 6 SDSS Sources SDSS Refined RA, Dec: 11 50 56.41 +57 09 25.1 ; 90% Conf. ["]= 1.537 XRT/DSS Frame Offset: RA 0.200 , Dec 3.100 , 90% Conf. Error: 2.030 Using 5 X-ray Sources and 5 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 24.9 ; 90% Conf. ["]= 2.189 Version: 0.7 (Fri Mar 21 19:22:37 UTC 2008) Using 2307 Counts, Exposure [s]= 26513.56 XRT/SDSS Frame Offset: RA 0.100 , Dec 3.300 , 90% Conf. Error: 1.350 Using 5 X-ray Sources and 6 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 25.1 ; 90% Conf. ["]= 1.581 XRT/DSS Frame Offset: RA 0.200 , Dec 3.100 , 90% Conf. Error: 2.090 Using 5 X-ray Sources and 5 DSS Sources DSS Refined RA, Dec: 11 50 56.42 +57 09 24.9 ; 90% Conf. ["]= 2.246 Version: 0.6 (Fri Mar 21 17:21:00 UTC 2008) Using 2298 Counts, Exposure [s]= 25839.97 XRT/SDSS Frame Offset: RA 0.700 , Dec 5.300 , 90% Conf. Error: 2.830 Using 6 X-ray Sources and 7 SDSS Sources SDSS Refined RA, Dec: 11 50 56.50 +57 09 27.0 ; 90% Conf. ["]= 2.944 XRT/DSS Frame Offset: RA 1.100 , Dec 5.300 , 90% Conf. Error: 4.690 Using 6 X-ray Sources and 6 DSS Sources DSS Refined RA, Dec: 11 50 56.55 +57 09 27.0 ; 90% Conf. ["]= 4.760 Version: 0.5 (Fri Mar 21 15:01:11 UTC 2008) Using 2298 Counts, Exposure [s]= 25839.10 XRT/SDSS Frame Offset: RA 0.700 , Dec 5.300 , 90% Conf. Error: 2.830 Using 6 X-ray Sources and 7 SDSS Sources SDSS Refined RA, Dec: 11 50 56.50 +57 09 27.0 ; 90% Conf. ["]= 2.944 XRT/DSS Frame Offset: RA 1.100 , Dec 5.300 , 90% Conf. Error: 4.690 Using 6 X-ray Sources and 6 DSS Sources DSS Refined RA, Dec: 11 50 56.55 +57 09 27.0 ; 90% Conf. ["]= 4.760 Version: 0.4 (Fri Mar 21 12:20:45 UTC 2008) Using 2267 Counts, Exposure [s]= 23901.85 XRT/SDSS Frame Offset: RA -0.400 , Dec 2.800 , 90% Conf. Error: 1.000 Using 4 X-ray Sources and 5 SDSS Sources SDSS Refined RA, Dec: 11 50 56.36 +57 09 24.4 ; 90% Conf. ["]= 1.294 XRT/DSS Frame Offset: RA -0.300 , Dec 2.900 , 90% Conf. Error: 2.310 Using 4 X-ray Sources and 5 DSS Sources DSS Refined RA, Dec: 11 50 56.38 +57 09 24.5 ; 90% Conf. ["]= 2.452 Version: 0.3 (Fri Mar 21 08:52:36 UTC 2008) Using 2256 Counts, Exposure [s]= 23268.92 XRT/SDSS Frame Offset: RA -0.500 , Dec 2.800 , 90% Conf. Error: 1.170 Using 4 X-ray Sources and 5 SDSS Sources SDSS Refined RA, Dec: 11 50 56.36 +57 09 24.4 ; 90% Conf. ["]= 1.439 XRT/DSS Frame Offset: RA -0.400 , Dec 2.900 , 90% Conf. Error: 2.550 Using 4 X-ray Sources and 5 DSS Sources DSS Refined RA, Dec: 11 50 56.37 +57 09 24.5 ; 90% Conf. ["]= 2.684 Version: 0.2 (Fri Mar 21 05:02:50 UTC 2008) Using 2222 Counts, Exposure [s]= 21829.74 XRT/SDSS Frame Offset: RA -0.600 , Dec 2.800 , 90% Conf. Error: 0.710 Using 4 X-ray Sources and 4 SDSS Sources SDSS Refined RA, Dec: 11 50 56.35 +57 09 24.4 ; 90% Conf. ["]= 1.102 XRT/DSS Frame Offset: RA -0.500 , Dec 2.700 , 90% Conf. Error: 0.730 Using 4 X-ray Sources and 5 DSS Sources DSS Refined RA, Dec: 11 50 56.36 +57 09 24.3 ; 90% Conf. ["]= 1.115 Version: 0.1 (Thu Mar 20 19:44:56 UTC 2008) Using 1942 Counts, Exposure [s]= 13050.31 XRT/SDSS Frame Offset: RA 0.100 , Dec 2.600 , 90% Conf. Error: 1.440 Using 2 X-ray Sources and 3 SDSS Sources SDSS Refined RA, Dec: 11 50 56.42 +57 09 24.9 ; 90% Conf. ["]= 1.770 XRT/DSS Frame Offset: RA 0.200 , Dec 2.500 , 90% Conf. Error: 1.730 Using 2 X-ray Sources and 3 DSS Sources DSS Refined RA, Dec: 11 50 56.43 +57 09 24.8 ; 90% Conf. ["]= 2.013 Version: 0.0 (Thu Mar 20 17:00:50 UTC 2008) Using 1834 Counts, Exposure [s]= 11405.52 XRT/SDSS Frame Offset: RA 0.200 , Dec 2.700 , 90% Conf. Error: 3.210 Using 2 X-ray Sources and 3 SDSS Sources SDSS Refined RA, Dec: 11 50 56.40 +57 09 25.0 ; 90% Conf. ["]= 3.385 XRT/DSS Frame Offset: RA 0.300 , Dec 2.600 , 90% Conf. Error: 4.630 Using 2 X-ray Sources and 3 DSS Sources DSS Refined RA, Dec: 11 50 56.41 +57 09 24.9 ; 90% Conf. ["]= 4.753