EROS II Galactic Spiral Arms microlensing candidates

Links to individual GSA candidates pages :

  • candidate GSA1
  • candidate GSA2
  • candidate GSA3
  • candidate GSA4
  • candidate GSA5
  • candidate GSA6
  • candidate GSA7

    • Characteristics of the 7 microlensing candidates: target, microlensing exposure Nobs Tsearch, equatorial and Galactic coordinates, magnitudes VJ and IC, number of measurements, time span, results from the unblended fit; time of the maximum t0 (in Julian Day -2,447,891.5), Einstein radius crossing time tE, maximum magnification Amax, chi2 of the best fit; sampling efficiency epsilon for events of duration tE and contribution to each direction's optical depth.

    Candidate GSA1 GSA2 GSA3 GSA4 GSA5 GSA6 GSA7
    Field gs200 gn400 gn409 gs202 gs202 gs203 gs203
    Nmeas 263 435 432 190 191 175 188
    Time span (days) 870 870 870 870 870 870 870
    Nobs Tsearch (in 106 years)5.73 9.64 9.64 5.73 5.73 5.73 5.73
    RA(h:m:s) J200018:29:09.0 16:11:50.2 16:16:26.7 18:32:26.0 18:32:12.0 18:33:45.5 18:35:12.4
    DEC(d:m:s) J2000-14:15:09 -52:56:49 -54:37:49 -12:56:04 -12:55:16 -14:41:41 -14:56:27
    l (galactic) 17.74 330.47 329.80 19.27 19.26 17.86 17.80
    b (galactic) -1.63 -1.14 -2.83 -1.73 -1.68 -2.83 -3.25
    VJ - IC 20.7 - 18.2 20.1 - 17.7 19.0 - 17.5 19.3 - 17.220.7 - 17.9 19.0 - 17.2 19.0 - 17.5
    t0 2408.65 +/- 0.04 2642.9 +/- 0.2 2806.2 +/- 1.1 2406.8 +/- 0.7 2408.4 +/- 2.8 2843.6 +/- 2.93201.6 +/- 0.2
    tE (days) 71.5+/- 1.1 98.3+/- 0.9 70.0+/- 2.0 23.9+/- 1.1 59.0+/- 5.1 37.9+/- 5.0 5.40 +/- 0.30
    Amax 26.5+/- 0.6 3.05+/- 0.02 1.89+/- 0.01 1.72+/- 0.02 1.71+/- 0.03 1.35+/- 0.022.40 +/- 0.30
    chi2 233 551 445 357 167 121 195
    epsilon(tE) (%) 11. 29. 25. 6.7 10. 8.3 4.
    Contribution to optical depth (times 106) 0.49 0.15 0.12 0.27 0.44 0.34 0.10 <\tr>
    All materials from this Web page come from the following Theses, from F. Derue et al "Observation of Microlensing towards the Galactic Spiral Arms. EROS II 2 year survey", published in A&A, 351, 87 (1999), available in Abstract, PDF File, PS file and from F. Derue et al "Observation of Microlensing towards the Galactic Spiral Arms. EROS II 3 year survey", published in A&A, 373, 126 (2001), available in Abstract, PDF File, PS file
    Frederic Derue
    Last modified: Tue Oct 2 18:33:40 CEST 2001