J/A+A/569/A122 Main-belt asteroids polarimetry. IV (Gil-Hutton+, 2014) ================================================================================ Polarimetric survey of main-belt asteroids. IV. New results from the first epoch of the CASLEO survey. Gil-Hutton R., Cellino A., Bendjoya P. =2014A&A...569A.122G ================================================================================ ADC_Keywords: Minor planets ; Polarization Keywords: minor planets, asteroids: general - techniques: polarimetric Abstract: We present results of a polarimetric survey of main-belt asteroids at Complejo Astronomico El Leoncito (CASLEO), San Juan, Argentina. The aims of this survey are to increase the database of asteroid polarimetry, to estimate diversity in polarimetric properties of asteroids that belong to different taxonomic classes, and to search for objects that exhibit anomalous polarimetric properties. The data were obtained using the Torino and CASPROF polarimeters at the 2.15m telescope. The Torino polarimeter is an instrument that allows simultaneous measurement of polarization in five different bands, and the CASPROF polarimeter is a two-hole aperture polarimeter with rapid modulation. Description: Results of the first epoch of the polarimetric survey of main-belt objects at Complejo Astronomico El Leoncito (CASLEO), San Juan, Argentina. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 156 351 Polarimetric data for the asteroids observed -------------------------------------------------------------------------------- See also: J/A+A/529/A86 : Polarimetric survey of main-belt asteroids (Gil-Hutton+, 2011) J/A+A/539/A115 : Main-belt asteroids polarimetry. II. (Gil-Hutton+, 2012) J/A+A/542/A11 : Main-belt asteroids polarimetry. III (Canada-Assandri+, 2012) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- Ast [1/5111] Asteroid number 6- 16 A11 "date" Date UT Date of observation 18- 22 F5.2 deg alpha [0/32] Phase angle {alpha} 24- 30 F7.3 % Pu [-2.5/6.4]? Reduced Linear polarization in U 32- 37 F6.3 % e_Pu ? Error in reduced linear polarization in U 39- 43 F5.1 deg thu [0/180]? Position angle with respect to the scattering plane in U {theta}_U_ 45- 48 F4.1 deg e_thu ? Error in position angle in U 50- 56 F7.3 % Pb [-2.6/5.9]? Reduced Linear polarization in B 58- 63 F6.3 % e_Pb ? Error in reduced linear polarization in B 65- 69 F5.1 deg thb [0/180]? Position angle with respect to the scattering plane in B {theta}_B_ 71- 74 F4.1 deg e_thb ? rror in position angle in B 76- 82 F7.3 % Pv [-2.0/5.2]? Reduced Linear polarization in V 84- 89 F6.3 % e_Pv ? Error in reduced linear polarization in V 91- 95 F5.1 deg thv [0/184]? Position angle with respect to the scattering plane in V {theta}_V_ 97-100 F4.1 deg e_thv ? Error in position angle in V 102-108 F7.3 % Pr [-1.8/5.4]? Reduced Linear polarization in R 110-115 F6.3 % e_Pr ? Error in reduced linear polarization in R 117-121 F5.1 deg thr [0/180]? Position angle with respect to the scattering plane in R {theta}_R_ 123-126 F4.1 deg e_thr ? Error in position angle in R 128-134 F7.3 % Pi [-1.7/5.8]? Reduced Linear polarization in I 136-141 F6.3 % e_Pi ? Error in reduced linear polarization in I 143-147 F5.1 deg thi [0/180]? Position angle with respect to the scattering plane in I {theta}_I_ 149-152 F4.1 deg e_thi ? Error in position angle in I 154-156 A3 --- Tax Bus taxonomic classification -------------------------------------------------------------------------------- Acknowledgements: Ricardo Gil-Hutton, rgilhutton(at)casleo.gov.ar References: Gil-Huttom & Canada-Assandri, Paper I 2011A&A...529A..86G Gil-Huttom & Canada-Assandri, Paper II 2012A&A...539A.115G Canada-Assandri et al., Paper III 2012A&A...542A..11C ================================================================================ (End) R. Gil-Hutton [CASLEO-CONICET, Argentina], P. Vannier [CDS] 23-Aug-2014