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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 95 120 The 120 events used for the measurement of
the optical depth
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See also:
J/ApJ/636/240 : OGLE II microlensing parameters (Sumi+, 2006)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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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)
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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 2005ApJ...631..879P)
SC-NN-NNNNNN = Ogle-II events (Sumi et al., 2006, Cat. J/ApJ/636/240)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Jan-2007