J/A+A/529/A86 Polarimetric survey of main-belt asteroids (Gil-Hutton+, 2011)
Polarimetric survey of main-belt asteroids.
I. Results for fifty seven S-, L-, and K-type objects.
Gil-Hutton G., M. Canada-Assandri M.
<Astron. Astrophys. 529, A86 (2011)>
=2011A&A...529A..86G 2011A&A...529A..86G
ADC_Keywords: Minor planets ; Polarization
Keywords: minor planets, asteroids: general - techniques: polarimetric
Abstract:
We present the first 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, similar to
those shown by the asteroid (234) Barbara.
The data were obtained with the Torino and CASPROF polarimeters at the
2.15m telescope. The Torino polarimeter is an instrument that allows
the simultaneous measurement of polarization in five different bands,
and the CASPROF polarimeter is a two-hole aperture polarimeter with
rapid modulation.
Description:
Results for the objects observed during the polarimetric survey of
main-belt asteroids.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
objects.dat 64 57 Asteroid fundamental parameters
table1.dat 75 82 Asteroids observed with the CASPROF polarimeter
table2.dat 75 54 Asteroids observed with the Torino polarimeter
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2009)
J/A+A/498/313 : Photometry of 3 main belt asteroids (Marciniak+, 2009)
J/A+A/508/1503 : Photometry of 3 main belt asteroids (Marciniak+, 2009)
J/A+A/539/A115 : Main-belt asteroids polarimetric survey II (Gil-Hutton+, 2012)
Byte-by-byte Description of file: objects.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Ast Asteroid number
6- 16 A11 --- Name Asteroid name
18- 22 F5.2 mag H Absolute magnitude H parameter (1)
24- 28 F5.1 km Diam ? IRAS diameter (1)
30- 38 F9.6 deg i Inclination (1)
40- 49 F10.8 --- e Eccentricity (1)
51- 60 F10.8 AU a Semimajor axis (1)
62 A1 --- T1 [1]? Indicates CASPROF observations in table1.dat
64 A1 --- T2 [2]? Indicates Torino observations in table2.dat
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Note (1): Data from The Asteroid Orbital Elements Database, Cat. B/astorb.
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Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Ast Asteroid number
6- 16 A11 --- Name Asteroid name
18- 27 A10 "YYYY-MM-DD" Date Observation UT date
29 A1 --- Band [VR] Observing band
31- 34 I4 s Tint Total integration time
36- 39 F4.1 deg theta Phase angle
41- 45 F5.1 deg PAsun Position angle of the scattering plane
47- 50 F4.2 % Pol Linear polarization
52- 55 F4.2 % e_Pol Error in linear polarization
57- 61 F5.1 deg PA Position angle of polarization in the
equatorial reference frame
63- 66 F4.1 deg e_PA Error in position angle in the equatorial
reference frame
68- 72 F5.2 % rPol Reduced linear polarization
74- 75 A2 --- Tax Bus taxonomic classification.
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Acknowledgements:
Ricardo Gil-Hutton, rgilhutton(at)casleo.gov.ar
(End) Ricardo Gil-Hutton [CASLEO, Argentina], Patricia Vannier [CDS] 08-Mar-2011