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J/A+A/454/185     EROS-2 microlensing parameters              (Hamadache+, 2006)

Galactic Bulge microlensing optical depth from EROS-2. Hamadache C., Le Guillou L., Tisserand P., Afonso C., Albert J.N., Andersen J., Ansari R., Aubourg E., Bareyre P., Beaulieu J.P., Charlot X., Coutures C., Ferlet R., Fouque P., Glicenstein J.F., Goldman B., Gould A., Graff D., Gros M., Haissinski J., De Kat J., Lesquoy E., Loup C., Magneville C., Marquette J.B., Maurice E., Maury A., Milsztajn A., Moniez M., Palanque-Delabrouille N., Perdereau O., Rahal Y.R., Rich J., Spiro M., Vidal-Madjar A., Vigroux L., Zylberajch S. <Astron. Astrophys., 454, 185-199 (2006)> =2006A&A...454..185H
ADC_Keywords: Gravitational lensing Keywords: Galaxy: bulge - Galaxy: stellar contents - Galaxy: structure - gravitational lensing Abstract: We present a new EROS-2 measurement of the microlensing optical depth toward the Galactic Bulge. Light curves of 5.6x106 clump-giant stars distributed over 66deg2 of the Bulge were monitored during seven Bulge seasons. 120 events were found with apparent amplifications greater than 1.6 and Einstein radius crossing times in the range 5d<tE<400d. This is the largest existing sample of clump-giant events and the first to include northern Galactic fields. Description: The data were acquired by EROS-2 with the 1m MARLY telescope at La Silla, Chile. The observations reported here concern 66 fields, monitored between July 1996 and October 2002. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 95 120 The 120 events used for the measurement of the optical depth
See also: J/ApJ/636/240 : OGLE II microlensing parameters (Sumi+, 2006) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 13 A13 --- EROS2 Event identification (FFF-N-N-NNNNN) field-CCD-quater-star number) 16- 23 F8.4 deg RAdeg Right ascension, in decimal degrees (J2000) 25- 32 F8.4 deg DEdeg Declination, in decimal degrees (J2000) 34- 39 F6.3 deg GLAT Galactic latitude 41- 46 F6.3 deg GLON [-6/10] Galactic longitude 48- 54 F7.3 d tE Einstein radius crossing time 56- 60 F5.3 --- u0 Optical depth 62- 71 F10.2 d t0 Time of maximum amplification (JD) 73- 77 F5.3 --- eps Efficiency used in the optical depth calculation 79- 95 A17 --- Note Note (1)
Note (1): Notes as follows: P = parallax X = xallarap or binary lens without caustic C = caustic binary lens B = strong blend M-NNN-NNNNN-NNN = Macho events (Popowski et al., 2005ApJ...631..879P) SC-NN-NNNNNN = Ogle-II events (Sumi et al., 2006, Cat. J/ApJ/636/240)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Jan-2007
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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