We have obtained linear polarization measurements of stars along the western side of the IRAS Vela Shell toward HD 62542. From 16 CCD fields distributed along the ionization front (I-front) we have built a catalog of 856 objects with polarization signal-to-noise ratio larger than 10. We detect very significant levels of polarization and hence an appreciable magnetic field throughout the region. Composite polarization maps around the I-front are shown. In some regions the polarization vectors are parallel to the I-front, but a perpendicular trend is also evident along parts of the front. In addition, the polarization pattern seems to be affected by gas streaming inside the cloud. The observations were made using a CCD imaging polarimeter attached to the 1.5m Telescope of Cerro Tololo Inter-American Observatory (CTIO), Chile. The data were collected in 1991 December and 1992 December. Table 1: CCD Field Positions -------------------------------------------------- Field RA (J2000) DE Obs. Date -------------------------------------------------- 01 7 42 37.08 -42 13 44.66 Dec. 1991 02 7 42 01.22 -42 07 02.30 Dec. 1991 03 7 41 25.31 -42 02 02.93 Dec. 1991 04 7 43 12.93 -42 20 25.03 Dec. 1991 05 7 38 59.84 -41 36 55.29 Dec. 1992 06 7 39 32.15 -41 28 59.42 Dec. 1992 07 7 40 03.96 -41 36 59.53 Dec. 1992 08 7 40 03.70 -41 44 59.52 Dec. 1992 09 7 40 35.51 -41 53 01.63 Dec. 1992 10 7 42 11.43 -42 01 06.96 Dec. 1992 11 7 42 10.92 -42 17 07.95 Dec. 1992 12 7 42 42.72 -42 25 11.05 Dec. 1992 13 7 42 10.66 -42 25 07.94 Dec. 1992 14 7 41 06.41 -42 29 03.71 Dec. 1992 15 7 40 09.39 -42 56 59.98 Dec. 1992 16 7 39 36.94 -43 08 58.84 Dec. 1992 --------------------------------------------------
Cone search capability for table J/ApJS/141/469/table2 (Field data)
