U.S. Naval Observatory Astrometry Department

RRFID News

2010 Oct: VLBA+ experiment RDV79 (2010JUN23) is finished, adding 173 (87 S-band; 86 X-band) images to the RRFID including images of 22 sources (0047+023, 0149-175, 0407-199, 0616-244, 0627-199, 0753-425, 0854-108, 0902-350, 1013+054, 1014+615, 1124-056, 1247+139, 1452+301, 1519-294, 1615+029, 1621+078, 1917-248, 2136-251, 2204-007, 2227-445, 2319+444, 2326-477 ) not previously imaged and another 2 sources imaged at S-band for the first time (1308+554, 1755+626). These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged (with Faith Hungwe of Rhodes University and HartRAO, South Africa) the data.

2010 Jul: VLBA+ experiment RDV77 (2009OCT07) is finished, adding 180 (90 S-band; 90 X-band) images to the RRFID including images of 21 sources (0110-361, 0332-403, 0521-403, 0627+814, 0705-412, 0714+457, 0717-393, 0855+143, 0857-329, 1015+057, 1149-084, 1232-338, 1327+504, 1406-297, 1456+044, 1817+157, 2005+372, 2039+037, 2215+150, 2311-373, 2348-432) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged (with Mike Dutka) the data.

2010 Jul: VLBA+ experiment RDV75 (2009MAY13) is finished, adding 179 (90 S-band; 89 X-band) images to the RRFID including images of 27 sources (0007-325, 0114-211, 0115-214, 0227-369, 0347-211, 0422-380, 0422-389, 0436-129, 0843-336, 1027-186, 1255-177, 1302-208, 1339-287, 1346-306, 1550-242, 1613-350, 1622-310, 1647+744, 1749+701, 1751+288, 1759-396, 1906-217, 2000+472, 2120-309, 2122-238, 2307+106, 2357-318) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2009 Jun: VLBA+ experiment RDV73 (2009JAN21) is finished, adding 175 (87 S-band; 88 X-band) images to the RRFID including images of 23 sources (0035-252, 0043-268, 0055-059, 0420+022, 0502-152, 0515+208, 0529+483, 0532-378, 0632-235, 0741-444, 0847-120, 0915-118, 1059-438, 1133-032, 1243-160, 1428+370, 1602-115, 1633-409, 1650-157, 1711-209, 1913-272, 2157-255, 2220-318) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2009 Jun: VLBA+ experiment RDV71 (2008SEP03) is finished, adding 168 (84 S-band; 84 X-band) images to the RRFID. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2009 Jun: VLBA+ experiment RDV25 (2001JAN29) is finished, adding 175 (87 S-band; 88 X-band) images to the RRFID including images of 2 sources (1604-333, 2312-319) not previously imaged. These results were contributed by Glenn Piner and Christopher Marvin of Whittier College who calibrated, edited and imaged the data.

2008 Sep: VLBA+ experiment RDV22 (2000JUL06) is finished, adding 179 (89 S-band; 90 X-band) images to the RRFID including images of 3 sources (1822-173, 1829-106, 2211-388) not previously imaged. These results were contributed by Glenn Piner and Christopher Marvin of Whittier College who calibrated, edited and imaged the data.

2008 Aug: VLBA+ experiment RDV69 (2008MAY14) is finished, adding 201 (100 S-band; 101 X-band) images to the RRFID including images of 19 sources (0131-450, 0316-444, 0437-454, 0632-183, 0648-287, 0733-187, 1223-188, 1333-152, 1418-192, 1600+294, 1639-200, 1718-259, 1845-273, 1925-206, 2000-330, 2149-306, 2056-369, 2314-409, 2329-415) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2008 July: VLBA+ experiment RDV14 (1999APR15) is finished, adding 180 (90 S-band; 90 X-band) images to the RRFID including images of 2 sources (0844+258, 1239+606) not previously imaged. These results were contributed by Glenn Piner and Corey Nichols of Whitier College who calibrated, edited and imaged the data.

2008 July: VLBA+ experiment RDV17 (1999AUG02) is finished, adding 159 (77 S-band; 82 X-band) images to the RRFID including images of 2 sources (0651+410, 1125+596) not previously imaged. These results were contributed by Glenn Piner and Corey Nichols of Whitier College who calibrated, edited and imaged the data.

2008 July: VLBA+ experiment RDV40 (2003JUL09) is finished, adding 167 (84 S-band; 83 X-band) images to the RRFID including images of 0 sources not previously imaged. These results were contributed by Glenn Piner and Corey Nichols of Whitier College who calibrated, edited and imaged the data.

2008 May: VLBA+ experiment RDV67 (2008JAN23) is finished, adding 194 (97 S-band; 97 X-band) images to the RRFID including images of 17 sources (0131-367, 0244-452, 0451-282, 0558-396, 0625-354, 1038+52A, 1251-197, 1333-337, 1404-342, 1531-352, 1645-329, 1705-353, 1710-323, 1749+096, 1751+441, 1926+087 and 2106-413) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2007 December: VLBA+ experiment RDV65 (2007AUG01) is finished, adding 203 (102 S-band; 101 X-band) images to the RRFID including images of 48 sources (0048-427, 0054+161, 0102+511, 0103+127, 0111+131, 0137+012, 0137+467, 0208-512, 0209+168, 0325+395, 0410+110, 0411+054, 0423+237, 0537-286, 0645+209, 0723+219, 0906-048, 0927+469, 1003+351, 1010+495, 1046-026, 1055-242, 1100+122, 1107+485, 1117-248, 1143-332, 1200+468, 1241+166, 1246+489, 1412+461, 1421+122, 1541+050, 1623-243, 1627+476, 1639-062, 1645+174, 1645+271, 1648+084, 1745+670, 1746+470, 1820-274, 1822+033, 1908+484, 2013+508, 2018+282, 2135-184, 2304+377 and 2319+317) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2007 August: VLBA+ experiment RDV63 (2007JUN26) is finished, adding 210 (105 S-band; 105 X-band) images to the RRFID including images of 49 sources (0025+197, 0134+311, 0211+171, 0239+175, 0307+380, 0312+100, 0415+398, 0442+389, 0548+378, 0641+392, 0729+259, 0743+277, 0747+185, 0828-222, 0951+268, 0958+346, 1013+127, 1040+244, 1054+004, 1059+282, 1125+366, 1145+268, 1212+171, 1218+339, 1306+360, 1348+308, 1424+366, 1441+252, 1520+319, 1608+243, 1639+230, 1651+391, 1722+330, 1725+123, 1736+324, 1754+155, 1846+322, 1909+161, 2000+148, 2013+163, 2029+024, 2155+312, 2201+044, 2205+166, 2205+743, 2214+350, 2216+178, 2318-195, and 2358+189) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2007 May: VLBA+ experiment RDV28 (2001MAY09) is finished, adding 186 (93 S-band; 93 X-band) images to the RRFID including images of 4 sources (0528-250, 0826-373, 1239+376 and NGC6454) not previously imaged. These results were contributed by Glenn Piner and Corey Nichols of Whitier College who calibrated, edited and imaged the data.

2007 April: VLBA+ experiment RDV61 (2007JAN24) is finished, adding 217 (109 S-band; 108 X-band) images to the RRFID including images of 17 sources (0035-024, 0459+252, 0521-365, 0629+160, 0812+020, 1056+212, 1104-445, 1119+183, 1142+052, 1200+045, 1216+061, 1337-033, 1508-055, 1721+343, 1933-400, 2329-384 and OL224) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2006 November: VLBA+ experiment RDV59 (2006SEP13) is finished, adding 184 (92 S-band; 92 X-band) images to the RRFID including images of 7 sources (0220-349, 1244-255, 1308+328, 1640-231, 1758+388, 1805-214 and 2005-489) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2006 October: VLBA+ experiment RDV23 (2000OCT23) is finished, adding 188 (94 S-band; 94 X-band) images to the RRFID including images of 4 sources (0118-272, 0925-203, 1451-400 and 0836+182) not previously imaged. These results were contributed by Glenn Piner and Corey Nichols of Whitier College who calibrated, edited and imaged the data.

2006 September: VLBA+ experiment RDV57 (2006JUL11) is finished, adding 160 (80 S-band; 80 X-band) images to the RRFID including images of 4 sources (0151+474, 0629-418, 0834-201 and 1032-199) not previously imaged. These results were contributed by Roopesh Ojha of the USNO who calibrated, edited and imaged the data.

2006 March: VLBA+ experiment RDV16 (1999JUN21) is finished, adding 182 (91 S-band; 91 X-band) images to the RRFID including images of 5 sources (0135-247, 0338-214, 0610+260, 1734+363 and 1806+456) not previously imaged. These results were contributed by Glenn Piner and Corey Nichols of Whitier College who calibrated, edited and imaged the data.

2004 November: VLBA+ experiment RDV45 (2004JUL14) is finished, adding 160 (80 S-band; 80 X-band) images to the RRFID including images of 11 sources (0316+413, 0426+273, 0602+673, 0620+389, 0656+082, 1030+074, 1226+023, 1240+381, 1417+385, 1738+499, 2235+731) not previously imaged. Unlike previous RDV experiments, the data from the geodetic antennas were flagged before processing leaving only the data obtained by the VLBA. The resultant images are essentially VLBA only but in some instances will have lower resolution due to the sub-netting of the array during the observations.

2004 June: VLBA experiment BL115C (2004FEB15) is finished, adding 65 (0 S-band; 65 X-band) images to the RRFID.

2002 December: VLBA+ experiment RDV12 (1998DEC21) is finished, adding 164 (83 S-band; 81 X-band) images to the RRFID including images of five sources (0055+300, 0400-319, 1026-084, 1352-104 and 1519-273) not previously imaged.

2002 June: VLBA+ experiment RDV31 (2002JAN16) is finished, adding 168 (84 S-band; 84 X-band) images to the RRFID including images of two sources not previously imaged.

2001 May: VLBA+ experiment RDV10 (1998AUG10) is finished, adding 170 (85 S-band; 85 X-band) images to the RRFID including images of five sources not previously imaged.

2001 March: VLBA+ experiment RDV07 (1998FEB09) is finished, adding 160 (80 S-band; 80 X-band) images to the RRFID including images of nine sources not previously imaged.

2000 July: VLBA+ experiment RDV09 (1998JUN24) is finished, adding 179 (89 S-band; 90 X-band) images to the RRFID.

2000 May: Animated GIF format images were added, giving a visual representation of data obtained between 1994 and 1998 from the VLBA on 70 different sources. These images were created by Ginger Leonard, a student from Thomas Jefferson High School for Science and Technology in Alexandria, Virginia while working as a summer student at the USNO.

Pre-history: Currently unavailable.


Last modified: Thu Oct 5 09:24:08 EDT 2006
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