. Particularly interesting events are marked with
. Events detected in the previous season(s)
can also be found:
41 events in
1998,
48 events in
1999.
Starting May 6th, 1998, the EWS system is reimplemented for the second phase of the experiment, called OGLE-2, which is carried out using 1.3 m Warsaw Telescope at Las Campanas Observatory, Chile.
PLEASE NOTE that the OGLE-II phase ended on November 26, 2000. Observations will be resumed in early 2001 with a new mosaic CCD camera. EWS system will be reimplemented some time later.
About 30 million stars were monitored in the Galactic bulge each night. Expected rate of microlensing events is about 50 per observing season (based on preliminary results of 1997 season). Several million stars are also monitored in fields covering most of the Large and Small Magellanic Clouds, as well as in some additional fields in the Galactic disk. These fields are also subject to real time microlensing search.
The Early Warning System is fully described in Udalski et al., 1994, Acta Astron., 44, 227. In short, an alarm is triggered if a star from the constant objects database (built from previous seasons data) brightens above 3-sigma level from its base magnitude for 4 consecutive observations. Sigma levels are computed for the whole sample of stars (as a function of mean magnitude) to define which objects are constant. When such a star is found, its light curve is inspected by eye, its position on the recent CCD frames checked for bad pixels, bleeding columns etc. and if it passes these checks, it is announced as a microlensing candidate.
EWS has detected 78 candidate
microlensing events in the 2000 observing season.
The table given below provides
interactive WWW access to the finding charts, photometry data and other
information about all events. Currently ongoing events are marked with
. Particularly interesting events are marked with
. Events detected in the previous season(s)
can also be found:
41 events in
1998,
48 events in
1999.
Microlensing events data can also be found on Data download site or on Anonymous FTP.
There is also a mailing list providing on-line notification on the detected events. Astronomers interested in follow-up observations and willing to receive e-mail notification, should fill out subscribe/unsubscribe form. If you have any questions or comments, send us a message.
The following table contains basic parameters of the candidate events as well as the links to the WWW pages with finding charts, light curve plots and photometric data. Photometry in Galactic bulge fields is based on preliminary absolute calibration and is accurate to about 0.05 mag. It will be refined in the near future. Microlensing light curve model fit parameters have following meaning:
| Event | Field | Star No | RA (J2000) | Dec (J2000) | Tmax (HJD) | Tmax (UT) | tau | Amax | Dmag | I0 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2000-BUL-01 | BUL_SC27 | 417748 | 17:48:28.86 | -35:18:35.3 | 2451585.643 | 2000-02-11.14 | 13.980 | 5.097 | 1.768 | 18.477 | |
| 2000-BUL-02 | BUL_SC5 | 152125 | 17:50:13.30 | -29:49:57.6 | 2451566.234 | 2000-01-22.73 | 83.321 | 1.958 | 0.729 | 15.075 | |
| 2000-BUL-03 | BUL_SC43 | 272803 | 17:35:16.42 | -27:18:40.5 | 2451581.868 | 2000-02-07.37 | 62.973 | 1.852 | 0.669 | 17.563 | |
| 2000-BUL-04 | BUL_SC5 | 348855 | 17:50:51.07 | -30:10:22.2 | 2451581.467 | 2000-02-06.97 | 28.123 | 1.362 | 0.335 | 14.990 | |
| 2000-SCO-01 | SCO_SC7 | 38447 | 17:03:05.58 | -44:21:23.8 | 2451491.653 | 1999-11-09.15 | 88.623 | 2006.3 | 8.256 | 16.890 | |
| 2000-BUL-05 | BUL_SC33 | 540825 | 18:05:45.79 | -28:30:52.4 | 2451552.902 | 2000-01-09.40 | 57.926 | 2.759 | 1.102 | 15.215 | |
|
| 2000-BUL-06 | BUL_SC22 | 77397 | 17:56:26.85 | -30:54:27.4 | 2451620.938 | 2000-03-17.44 | 22.756 | 32.448 | 3.778 | 17.195 |
| 2000-BUL-07 | BUL_SC4 | 321697 | 17:54:25.13 | -29:37:49.4 | 2451615.292 | 2000-03-11.79 | 25.366 | 1.880 | 0.685 | 16.762 | |
| 2000-LMC-01 | LMC_SC9 | 4007 | 5:12:44.91 | -69:41:28.1 | 2451603.828 | 2000-02-29.33 | 45.246 | 4.114 | 1.536 | 20.503 | |
| 2000-BUL-08 | BUL_SC15 | 362747 | 17:48:09.57 | -23:14:00.2 | 2451625.050 | 2000-03-21.55 | 49.099 | 1.450 | 0.404 | 15.706 | |
|
| 2000-SCO-02 | SCO_SC1 | 131946 | 16:41:02.61 | -44:36:02.5 | 2451702.030 | 2000-06-06.53 | 16.356 | 4.657 | 1.670 | 18.745 |
| 2000-BUL-09 | BUL_SC21 | 166607 | 18:00:00.22 | -28:38:18.3 | 2451614.779 | 2000-03-11.28 | 16.568 | 2.088 | 0.799 | 17.864 | |
| 2000-BUL-10 | BUL_SC34 | 451887 | 17:58:14.20 | -28:48:22.3 | 2451580.552 | 2000-02-06.05 | 54.537 | 1.878 | 0.684 | 15.918 | |
| 2000-BUL-11 | BUL_SC43 | 357654 | 17:35:37.97 | -27:37:14.6 | 2451616.062 | 2000-03-12.56 | 8.413 | 3.772 | 1.441 | 17.741 | |
|
| 2000-BUL-12 | BUL_SC43 | 244614 | 17:35:13.40 | -27:35:18.7 | 2451635.963 | 2000-04-01.46 | 25.569 | 50.678 | 4.262 | 18.875 |
| 2000-BUL-13 | BUL_SC37 | 401293 | 17:52:32.30 | -29:58:46.8 | 2451654.364 | 2000-04-19.86 | 47.379 | 1.198 | 0.196 | 15.344 | |
| 2000-BUL-14 | BUL_SC3 | 91894 | 17:53:08.92 | -29:59:02.6 | 2451630.075 | 2000-03-26.57 | 27.855 | 1.317 | 0.299 | 16.972 | |
| 2000-BUL-15 | BUL_SC40 | 443839 | 17:51:11.19 | -33:00:57.0 | 2451630.712 | 2000-03-27.21 | 5.457 | 2.398 | 0.950 | 15.202 | |
| 2000-BUL-16 | BUL_SC24 | 145952 | 17:52:46.03 | -32:30:23.8 | 2451632.039 | 2000-03-28.54 | 23.310 | 7.383 | 2.171 | 18.437 | |
| 2000-BUL-17 | BUL_SC5 | 230720 | 17:50:27.62 | -30:09:29.9 | 2451648.932 | 2000-04-14.43 | 22.905 | 5.357 | 1.822 | 16.666 | |
| 2000-BUL-18 | BUL_SC24 | 233671 | 17:53:15.27 | -32:55:35.0 | 2451634.760 | 2000-03-31.26 | 3.857 | 1.818 | 0.649 | 18.999 | |
| 2000-BUL-19 | BUL_SC41 | 308026 | 17:52:16.43 | -33:33:58.9 | 2451652.438 | 2000-04-17.94 | 42.129 | 2.778 | 1.109 | 18.802 | |
| 2000-BUL-20 | BUL_SC30 | 289030 | 18:01:24.97 | -28:50:41.4 | 2451647.327 | 2000-04-12.83 | 25.860 | 3.173 | 1.254 | 17.967 | |
| 2000-BUL-21 | BUL_SC2 | 423881 | 18:04:26.00 | -28:26:31.4 | 2451655.508 | 2000-04-21.01 | 20.955 | 4.270 | 1.576 | 19.160 | |
| 2000-BUL-22 | BUL_SC19 | 47385 | 18:07:41.84 | -27:28:25.7 | 2451668.036 | 2000-05-03.54 | 107.329 | 4.373 | 1.602 | 19.915 | |
| 2000-BUL-23 | BUL_SC24 | 435701 | 17:53:33.27 | -32:33:29.1 | 2451665.599 | 2000-05-01.10 | 8.626 | 3.123 | 1.237 | 18.919 | |
| 2000-BUL-24 | BUL_SC27 | 554610 | 17:48:49.20 | -35:25:28.5 | 2451683.554 | 2000-05-19.05 | 22.708 | 1.248 | 0.241 | 14.203 | |
| 2000-BUL-25 | BUL_SC37 | 645044 | 17:52:58.69 | -29:34:22.2 | 2451685.691 | 2000-05-21.19 | 13.399 | 3.331 | 1.306 | 16.449 | |
| 2000-BUL-26 | BUL_SC3 | 478487 | 17:53:47.38 | -30:05:26.2 | 2451705.657 | 2000-06-10.16 | 33.731 | 1.594 | 0.506 | 14.045 | |
| 2000-BUL-27 | BUL_SC4 | 274100 | 17:54:26.55 | -29:51:05.7 | 2451681.489 | 2000-05-16.99 | 14.472 | 3.819 | 1.455 | 18.557 | |
|
| 2000-BUL-28 | BUL_SC34 | 358528 | 17:58:13.12 | -29:09:14.3 | 2451678.314 | 2000-05-13.81 | 8.541 | 6132.3 | 9.469 | 16.977 |
| 2000-BUL-29 | BUL_SC37 | 463341 | 17:52:44.65 | -29:39:57.0 | 2451698.297 | 2000-06-02.80 | 19.739 | 3.708 | 1.423 | 17.067 | |
|
| 2000-BUL-30 | BUL_SC30 | 454605 | 18:01:30.89 | -28:59:26.7 | 2451780.789 | 2000-08-24.29 | 65.706 | 1.638 | 0.536 | 15.572 |
| 2000-BUL-31 | BUL_SC12 | 430062 | 18:16:33.27 | -24:14:22.7 | 2451743.240 | 2000-07-17.74 | 28.227 | 7.637 | 2.207 | 15.498 | |
| 2000-BUL-32 | BUL_SC14 | 73292 | 17:46:37.46 | -23:08:57.8 | 2451725.975 | 2000-06-30.48 | 55.005 | 1.127 | 0.130 | 16.490 | |
| 2000-BUL-33 | BUL_SC17 | 597331 | 18:11:28.29 | -26:15:05.8 | 2451730.172 | 2000-07-04.67 | 36.774 | 6.975 | 2.109 | 16.991 | |
| 2000-BUL-34 | BUL_SC43 | 384214 | 17:35:36.03 | -27:23:18.1 | 2451710.771 | 2000-06-15.27 | 15.495 | 3.520 | 1.366 | 17.762 | |
|
| 2000-BUL-35 | BUL_SC41 | 467827 | 17:52:24.55 | -33:30:04.3 | 2451702.910 | 2000-06-07.41 | 8.907 | 75.181 | 4.690 | 18.469 |
| 2000-BUL-36 | BUL_SC20 | 371199 | 17:59:08.14 | -28:32:57.0 | 2451712.371 | 2000-06-16.87 | 23.629 | 1.135 | 0.137 | 16.067 | |
| 2000-BUL-37 | BUL_SC14 | 235123 | 17:47:00.44 | -23:09:48.7 | 2451714.101 | 2000-06-18.60 | 13.317 | 1.693 | 0.572 | 17.633 | |
|
| 2000-BUL-38 | BUL_SC3 | 318561 | 17:53:19.20 | -29:57:33.9 | 2451716.200 | 2000-06-20.70 | - | - | - | 17.870 |
| 2000-BUL-39 | BUL_SC22 | 371120 | 17:56:43.74 | -30:22:23.7 | 2451719.628 | 2000-06-24.13 | 13.365 | 1.312 | 0.295 | 17.099 | |
|
| 2000-BUL-40 | BUL_SC17 | 404893 | 18:11:12.40 | -26:24:10.3 | 2451785.386 | 2000-08-28.89 | 57.705 | 1.876 | 0.683 | 16.542 |
| 2000-BUL-41 | BUL_SC4 | 65601 | 17:54:09.41 | -29:53:36.9 | 2451767.256 | 2000-08-10.76 | 26.467 | 1.910 | 0.703 | 13.897 | |
| 2000-BUL-42 | BUL_SC31 | 111306 | 18:01:52.14 | -28:32:36.5 | 2451749.183 | 2000-07-23.68 | 41.472 | 1.227 | 0.222 | 13.540 | |
|
| 2000-BUL-43 | BUL_SC7 | 20290 | 18:08:43.04 | -32:24:39.5 | 2451898.843 | 2000-12-20.34 | 173.611 | 27493.9 | 11.098 | 13.752 |
| 2000-BUL-44 | BUL_SC19 | 656772 | 18:08:18.42 | -27:07:16.2 | 2451745.711 | 2000-07-20.21 | 35.096 | 1.481 | 0.426 | 17.968 | |
|
| 2000-BUL-45 | BUL_SC7 | 68991 | 18:08:46.39 | -32:03:00.8 | 2451771.488 | 2000-08-14.99 | 67.315 | 5.024 | 1.753 | 19.199 |
|
| 2000-BUL-46 | BUL_SC4 | 746833 | 17:54:55.36 | -29:24:59.8 | 2451750.626 | 2000-07-25.13 | - | - | - | 17.951 |
| 2000-BUL-47 | BUL_SC4 | 489287 | 17:54:42.92 | -29:44:12.1 | 2451751.267 | 2000-07-25.77 | 7.888 | 1.209 | 0.206 | 16.329 | |
| 2000-BUL-48 | BUL_SC30 | 636963 | 18:01:44.80 | -28:58:03.5 | 2451775.713 | 2000-08-19.21 | 18.853 | 2.970 | 1.182 | 15.764 | |
| 2000-BUL-49 | BUL_SC20 | 274481 | 17:59:17.80 | -29:02:51.4 | 2451751.456 | 2000-07-25.96 | 14.799 | 1.533 | 0.464 | 17.770 | |
| 2000-BUL-50 | BUL_SC33 | 257733 | 18:05:28.41 | -29:00:46.2 | 2451774.396 | 2000-08-17.90 | 20.728 | 1.340 | 0.318 | 15.827 | |
| 2000-BUL-51 | BUL_SC3 | 457322 | 17:53:41.85 | -30:15:22.3 | 2451762.731 | 2000-08-06.23 | 18.823 | 1.513 | 0.450 | 17.479 | |
|
| 2000-BUL-52 | BUL_SC39 | 338829 | 17:55:26.64 | -29:37:55.9 | 2451752.887 | 2000-07-27.39 | 2.742 | 2.979 | 1.185 | 17.690 |
| 2000-BUL-53 | BUL_SC28 | 187954 | 17:47:01.60 | -36:47:58.5 | 2451759.248 | 2000-08-02.75 | 14.190 | 1.850 | 0.668 | 19.080 | |
| 2000-BUL-54 | BUL_SC41 | 410758 | 17:52:19.27 | -32:57:04.8 | 2451767.330 | 2000-08-10.83 | 25.852 | 3.516 | 1.365 | 18.451 | |
|
| 2000-BUL-55 | BUL_SC30 | 94465 | 18:01:06.71 | -28:52:22.6 | 2451783.789 | 2000-08-27.29 | 29.468 | 27.894 | 3.614 | 18.416 |
| 2000-BUL-56 | BUL_SC35 | 286520 | 18:04:12.66 | -28:01:08.4 | 2451785.606 | 2000-08-29.11 | 16.378 | 3.110 | 1.232 | 18.136 | |
| 2000-BUL-57 | BUL_SC40 | 576815 | 17:51:27.25 | -33:06:58.4 | 2451775.601 | 2000-08-19.10 | 5.598 | 6.570 | 2.044 | 18.881 | |
|
| 2000-BUL-58 | BUL_SC43 | 243111 | 17:35:28.91 | -27:34:08.7 | 2451775.378 | 2000-08-18.88 | 2.540 | 1.943 | 0.721 | 16.683 |
| 2000-BUL-59 | BUL_SC21 | 234352 | 17:59:54.38 | -28:25:47.2 | 2451779.728 | 2000-08-23.23 | 14.346 | 11.045 | 2.608 | 19.429 | |
|
| 2000-BUL-60 | BUL_SC22 | 414328 | 17:56:59.20 | -31:03:22.3 | 2451832.700 | 2000-10-15.20 | 39.467 | 1.568 | 0.488 | 16.395 |
|
| 2000-BUL-61 | BUL_SC33 | 290665 | 18:05:29.67 | -28:51:03.3 | 2451858.909 | 2000-11-10.41 | 71.212 | 1.292 | 0.278 | 15.938 |
| 2000-BUL-62 | BUL_SC30 | 478797 | 18:01:26.82 | -28:52:34.9 | 2451799.727 | 2000-09-12.23 | 21.142 | 1.297 | 0.282 | 15.554 | |
| 2000-BUL-63 | BUL_SC41 | 251743 | 17:51:53.89 | -32:59:10.8 | 2451808.323 | 2000-09-20.82 | 17.738 | 1.552 | 0.477 | 17.263 | |
| 2000-BUL-64 | BUL_SC32 | 702134 | 18:03:54.71 | -28:34:58.8 | 2451795.910 | 2000-09-08.41 | 14.750 | 6.858 | 2.091 | 17.502 | |
|
| 2000-BUL-65 | BUL_SC39 | 448311 | 17:55:44.55 | -30:05:19.6 | 2451838.711 | 2000-10-21.21 | 33.877 | 1.494 | 0.436 | 15.212 |
| 2000-BUL-66 | BUL_SC4 | 245463 | 17:54:30.06 | -29:57:59.2 | 2451806.649 | 2000-09-19.15 | 28.139 | 1.391 | 0.358 | 17.391 | |
| 2000-BUL-67 | BUL_SC39 | 1073 | 17:55:10.06 | -30:10:29.5 | 2451808.289 | 2000-09-20.79 | 10.560 | 1.395 | 0.361 | 16.342 | |
|
| 2000-BUL-68 | BUL_SC34 | 908441 | 17:58:43.03 | -28:50:17.2 | 2451811.147 | 2000-09-23.65 | 3.617 | 2.852 | 1.138 | 18.195 |
| 2000-BUL-69 | BUL_SC14 | 386574 | 17:47:05.90 | -23:09:57.2 | 2451820.862 | 2000-10-03.36 | 16.474 | 1.189 | 0.188 | 16.201 | |
| 2000-BUL-70 | BUL_SC24 | 522165 | 17:53:36.61 | -32:59:28.9 | 2451814.533 | 2000-09-27.03 | 16.591 | 2.349 | 0.927 | 19.104 | |
|
| 2000-BUL-71 | BUL_SC19 | 537362 | 18:08:09.30 | -26:49:12.5 | 2451844.562 | 2000-10-27.06 | 63.811 | 1.331 | 0.311 | 16.075 |
| 2000-BUL-72 | BUL_SC40 | 565371 | 17:51:25.94 | -33:09:29.2 | 2451826.736 | 2000-10-09.24 | 15.830 | 1.800 | 0.638 | 17.523 | |
| 2000-BUL-73 | BUL_SC3 | 166539 | 17:53:04.21 | -29:43:35.2 | 2451830.083 | 2000-10-12.58 | 13.025 | 4.109 | 1.534 | 18.330 | |
|
| 2000-BUL-74 | BUL_SC31 | 737372 | 18:02:53.30 | -28:23:18.3 | 2451836.080 | 2000-10-18.58 | 47.726 | 44.796 | 4.128 | 19.026 |
|
| 2000-BUL-75 | BUL_SC23 | 455191 | 17:57:57.16 | -31:16:43.2 | 2451862.095 | 2000-11-13.60 | 47.318 | 3.471 | 1.351 | 18.176 |
PLEASE NOTE that the OGLE-II phase ended on November 26, 2000. Observations will be resumed in early 2001 with a new mosaic CCD camera. EWS system will be reimplemented some time later.
Andrzej Udalski and Michal Szymanski
Warsaw University Observatory
Warsaw, Poland
Last updated on Wed Dec 20 09:04:05 MET 2000