[1] San Diego State University,Astronomy Department
[2] 5500 Campanile Drive,Department of Astronomy and Astrophysics
[3] San Diego,Department of Physics and Astronomy
[4] California 92182,Physics Department and Kavli Institute for Astrophysics and Space Research
[5] USA,Department of Physics and Astronomy
[6] Harvard-Smithsonian Center for Astrophysics,Department of Astronomy and Astrophysics
[7] 60 Garden Street,Astronomy Department
[8] UCO/Lick Observatory,Department of Physics
[9] University of California,undefined
[10] University of Florida,undefined
[11] 211 Bryant Space Science Center,undefined
[12] NASA Ames Research Center,undefined
[13] Villanova University,undefined
[14] 800 E. Lancaster Avenue,undefined
[15] Villanova,undefined
[16] Pennsylvania 19085,undefined
[17] USA,undefined
[18] Georgia State University,undefined
[19] PO Box 4106,undefined
[20] Atlanta,undefined
[21] Georgia 30302,undefined
[22] USA,undefined
[23] Massachusetts Institute of Technology,undefined
[24] 77 Massachusetts Avenue,undefined
[25] Cambridge,undefined
[26] Massachusetts 02139,undefined
[27] USA,undefined
[28] Carl Sagan Center for the Study of Life in the Universe,undefined
[29] SETI Institute,undefined
[30] 189 Bernardo Avenue,undefined
[31] Mountain View,undefined
[32] California 94043,undefined
[33] USA ,undefined
[34] Bay Area Environmental Research Institute,undefined
[35] Inc.,undefined
[36] 560 Third Street West,undefined
[37] Sonoma,undefined
[38] California 95476,undefined
[39] USA ,undefined
[40] San Jose State University,undefined
[41] One Washington Square,undefined
[42] San Jose,undefined
[43] California 95192,undefined
[44] USA,undefined
[45] Instituut voor Sterrenkunde,undefined
[46] Katholieke Universiteit Leuven,undefined
[47] Celestijnenlaan 200D,undefined
[48] B-3001 Leuven,undefined
[49] Belgium ,undefined
[50] McDonald Observatory,undefined