Observation details report
Detailed source parameters (including errors) in a comma-separated values file
Click on source number for detailed analysis, including spectral fits if applicable
| data | idnum | idradec | telescope | instrument | x | y | cnts | cntserr | rate | rateerr | SNR | poisprob | sigmaj | sigmin | incang | offax | cnts_soft | cnts_hard | hr | hr_err | ext | var | N_H | flux | vign | flags | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Report | srcpi bgdpi arf rmf | 1 | X095926.88+015341.8 | chandra | ccd1 | 136.664 | 979.028 | 200.454 | 14.975 | 0.00405714 | 0.00030309 | 84.8099 | 1 | 3.22907 | 1.7694 | 330.438 | 8.24367 | 83.2833 | 125.432 | 0.201945 | 0.0768916 | F | F | 1.72e+20 | 6.46525e-14 | 1 | dsxf |
| Report | srcpi bgdpi arf | 2 | X095917.26+015019.4 | chandra | ccd1 | 429.99 | 567.704 | 98.7128 | 10.0565 | 0.00199792 | 0.00020354 | 41.7643 | 1 | 1.24629 | 0.734473 | 164.921 | 5.6555 | 61.451 | 32.5026 | -0.308113 | 0.120827 | F | F | 1.73e+20 | 2.52829e-14 | 1 | dsx |
| Report | srcpi bgdpi arf | 11 | X095931.39+014118.8 | chandra | ccd2 | 860.384 | 680.888 | 56.8235 | 8.17454 | 0.00115016 | 0.000165461 | 21.1122 | 1 | 1.04866 | 0.423778 | 53.7214 | 4.20409 | 31.7603 | 25.5206 | -0.108931 | 0.15245 | F | F | 1.78e+20 | 1.64983e-14 | 1 | dsx |
| Report | srcpi bgdpi arf | 1 | X095916.84+014542.0 | chandra | ccd0 | 275.16 | 1020.42 | 48.9837 | 8.1239 | 0.000991478 | 0.000164436 | 48.5888 | 1 | 0.492 | 0.492 | 11.1367 | 3.01154 | 21.4918 | 26.4918 | 0.104202 | 0.169115 | F | F | 1.76e+20 | 1.26818e-14 | 1 | dpx |
| Report | srcpi bgdpi arf | 5 | X095916.94+014842.3 | chandra | ccd1 | 439.786 | 370.399 | 40.1683 | 6.79621 | 0.000812996 | 0.000137554 | 16.9948 | 1 | 0.899601 | 0.446586 | 335.479 | 4.40107 | 26.8319 | 12.5377 | -0.363076 | 0.200052 | F | F | 1.74e+20 | 1.01562e-14 | 1 | dsx |
| Report | srcpi bgdpi arf | 1 | X095937.00+015202.0 | chandra | ccd3 | 853.449 | 959.271 | 30.3892 | 6.9965 | 0.000615069 | 0.000141607 | 15.3919 | 1 | 1.10433 | 1.10433 | 0 | 6.87988 | 24.4073 | 11.0527 | -0.37661 | 0.218323 | F | F | 1.73e+20 | 8.30058e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 3 | X095916.06+015048.5 | chandra | ccd1 | 466.514 | 626.915 | 69.1006 | 8.94685 | 0.00139858 | 0.000181082 | 29.2357 | 1 | 1.4813 | 0.829538 | 341.34 | 6.23684 | 50.3836 | 28.7672 | -0.273104 | 0.131693 | F | F | 1.73e+20 | 1.88301e-14 | 1 | dsx |
| Report | srcpi bgdpi arf | 6 | X095957.97+014327.6 | chandra | ccd2 | 50.2751 | 942.674 | 26.7758 | 7.27848 | 0.000541969 | 0.000147324 | 9.9483 | 1 | 1.33818 | 1.33818 | 0 | 7.54511 | 26.5606 | 11.7138 | -0.387903 | 0.211789 | F | F | 1.77e+20 | 8.05574e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 2 | X095956.07+014727.6 | chandra | ccd3 | 271.872 | 401.104 | 36.7313 | 7.68954 | 0.000743432 | 0.000155634 | 13.6241 | 1 | 2.33288 | 1.2064 | 76.3199 | 7.08507 | 23.8544 | 11.0083 | -0.368479 | 0.231026 | A | F | 1.75e+20 | 1.08635e-14 | 1 | dbx |
| Report | srcpi bgdpi arf | 4 | X095910.01+015222.5 | chandra | ccd1 | 650.432 | 817.364 | 32.22 | 7.61438 | 0.000652124 | 0.000154113 | 9.81335 | 1 | 2.65041 | 2.12265 | 33.1338 | 8.36058 | 22.9789 | 8.13378 | -0.47714 | 0.266408 | F | F | 1.72e+20 | 9.09891e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 1 | X095936.98+014235.5 | chandra | ccd2 | 689.835 | 836.757 | 28.8492 | 5.37307 | 0.000583936 | 0.000108756 | 10.7187 | 1 | 0.794381 | 0.548825 | 41.0919 | 3.52109 | 18.2979 | 10.3564 | -0.277149 | 0.237848 | F | F | 1.77e+20 | 7.31094e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 2 | X095854.73+014308.0 | chandra | ccd0 | 949.472 | 707.818 | 15.922 | 6.44083 | 0.000322278 | 0.000130369 | 6.59328 | 1 | 4.53712 | 0.869753 | 352.647 | 8.87275 | 10.4418 | 10.0982 | -0.0167289 | 0.306348 | A | F | 1.79e+20 | 4.67472e-15 | 1 | dsx |
| Report | srcpi bgdpi arf rmf | 3 | X095904.98+014448.0 | chandra | ccd0 | 637.084 | 911.146 | 115.072 | 11.1579 | 0.00232917 | 0.000225848 | 47.6511 | 1 | 1.64228 | 1.19791 | 356.589 | 6.00219 | 82.0736 | 43.159 | -0.310738 | 0.103701 | F | F | 1.76e+20 | 3.13941e-14 | 1 | dsxf |
| Report | srcpi bgdpi arf | 3 | X095927.27+014635.3 | chandra | ccd3 | 1149.82 | 295.191 | 21.641 | 5.05404 | 0.000438009 | 0.000102293 | 10.961 | 1 | 0.494831 | 0.218748 | 336.475 | 1.1862 | 10.9251 | 9.92508 | -0.0479613 | 0.273233 | F | F | 1.75e+20 | 8.64383e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 4 | X095935.87+014557.9 | chandra | ccd3 | 887.695 | 219.143 | 19.9221 | 4.64682 | 0.000403219 | 9.40507e-05 | 10.0904 | 1 | 0.410418 | 0.410418 | 0 | 1.82245 | 10 | 10.5762 | 0.0280011 | 0.276662 | F | F | 1.76e+20 | 4.84255e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 9 | X095934.12+013707.9 | chandra | ccd2 | 776.678 | 170.428 | 19.2032 | 7.06218 | 0.000388693 | 0.000142945 | 4.68556 | 0.999986 | 3.17718 | 3.01569 | 166.199 | 8.43891 | 11.4191 | 8.23079 | -0.162255 | 0.360895 | F | F | 1.8e+20 | 5.80235e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 17 | X095918.90+014649.5 | chandra | ccd1 | 380.014 | 141.181 | 18.1002 | 4.25443 | 0.000366343 | 8.61085e-05 | 7.658 | 1 | 0.859689 | 0.354543 | 351.063 | 2.83492 | 9.72056 | 7.40618 | -0.135132 | 0.315741 | F | F | 1.75e+20 | 4.33251e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 7 | X095947.53+013853.1 | chandra | ccd2 | 367.976 | 384.214 | 28.9958 | 6.97913 | 0.000586903 | 0.000141264 | 11.8333 | 1 | 1.60165 | 1.38509 | 44.152 | 8.06879 | 0.583669 | 28.8514 | 0.960342 | 0.329714 | F | F | 1.79e+20 | 9.19158e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 9 | X095920.33+014903.8 | chandra | ccd1 | 336.234 | 414.102 | 15.6524 | 4.00206 | 0.000316801 | 8.10009e-05 | 6.62236 | 1 | 0.516536 | 0.516536 | 0 | 4.18097 | 7 | 9.74546 | 0.163953 | 0.317258 | F | F | 1.74e+20 | 3.85374e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 11 | X095917.40+014941.7 | chandra | ccd1 | 425.725 | 491.139 | 17.5331 | 4.18725 | 0.000354866 | 8.47491e-05 | 7.41807 | 1 | 0.991408 | 0.991408 | 0 | 5.10797 | 4.72914 | 10.7291 | 0.388142 | 0.371866 | F | F | 1.74e+20 | 4.54752e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 8 | X095924.70+014812.2 | chandra | ccd1 | 203.059 | 309.161 | 17.0583 | 4.26657 | 0.000345256 | 8.63545e-05 | 7.21718 | 1 | 0.377085 | 0.377085 | 0 | 2.92644 | 4 | 11.7448 | 0.491895 | 0.362619 | F | F | 1.75e+20 | 4.31427e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 4 | X095928.20+014452.0 | chandra | ccd2 | 957.657 | 1114.33 | 15.0699 | 3.882 | 0.000305029 | 7.85753e-05 | 5.59908 | 0.999998 | 0.322116 | 0.322116 | 0 | 0.62234 | 3.9153 | 10.9153 | 0.471997 | 0.372808 | F | F | 1.76e+20 | 3.55413e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 3 | X095926.01+014444.8 | chandra | ccd2 | 1024.38 | 1099.6 | 13.7815 | 3.71234 | 0.000278951 | 7.51416e-05 | 5.12039 | 0.999992 | 0.421403 | 0.421403 | 0 | 1.01347 | 6.91524 | 6.83048 | -0.00616617 | 0.354516 | F | F | 1.76e+20 | 5.65687e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 13 | X095935.43+014545.5 | chandra | ccd3 | 901.216 | 193.932 | 13.8313 | 3.77324 | 0.000279943 | 7.63696e-05 | 7.00543 | 1 | 0.471374 | 0.471374 | 0 | 1.66784 | 7.91513 | 5.66051 | -0.166078 | 0.363867 | F | F | 1.76e+20 | 3.55852e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 5 | X095935.68+014610.6 | chandra | ccd3 | 893.577 | 244.922 | 10.4974 | 3.23997 | 0.000212465 | 6.55762e-05 | 5.31684 | 0.999985 | 0.519551 | 0.519551 | 0 | 1.84416 | 6.66131 | 5.49197 | -0.0962163 | 0.391956 | F | F | 1.76e+20 | 2.66502e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 4 | X095911.47+014424.9 | chandra | ccd0 | 439.244 | 864.152 | 11.9544 | 3.45751 | 0.000241969 | 6.99837e-05 | 4.9503 | 0.99996 | 0.811494 | 0.811494 | 0 | 4.46925 | 6.74573 | 4.4067 | -0.209732 | 0.421949 | F | F | 1.76e+20 | 3.02186e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 10 | X095915.05+014926.5 | chandra | ccd1 | 496.6 | 459.7 | 16.7894 | 5.21307 | 0.000339813 | 0.000105511 | 36.5874 | 1 | 0.59382 | 0.492 | 21.021 | 5.26232 | 7.92981 | 8.85962 | 0.0553806 | 0.312737 | F | F | 1.74e+20 | 4.43268e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 7 | X095931.65+014754.7 | chandra | ccd3 | 1015.8 | 456.1 | 9.40715 | 4.27872 | 0.000190398 | 8.66001e-05 | 12.2176 | 1 | 0.492 | 0.492 | 168.307 | 2.5423 | 1.91531 | 7.49184 | 0.592798 | 0.533433 | F | F | 1.75e+20 | 2.26155e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 10 | X095940.47+014937.7 | chandra | ccd3 | 747.1 | 665.4 | 9.09498 | 4.27872 | 0.00018408 | 8.66001e-05 | 9.56034 | 1 | 0.9929 | 0.558359 | 41.8107 | 5.07274 | 0.666572 | 8.47604 | 0.854183 | 0.620941 | A | F | 1.74e+20 | 2.36183e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 13 | X095912.13+015214.3 | chandra | ccd1 | 585.7 | 800.8 | 7.6424 | 4.1225 | 0.00015468 | 8.34382e-05 | 6.55909 | 0.999998 | 0.926155 | 0.706939 | 143.287 | 7.95755 | 4.61211 | 3.15958 | -0.1869 | 0.544843 | F | F | 1.73e+20 | 2.18874e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 7 | X095922.41+014721.1 | chandra | ccd1 | 272.389 | 204.722 | 8.49184 | 4.1225 | 0.000171872 | 8.34382e-05 | 11.9125 | 1 | 0.492 | 0.492 | 25.1947 | 2.47826 | 6.83061 | 2.57653 | -0.452218 | 0.503605 | F | F | 1.75e+20 | 2.01658e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 12 | X095958.15+015132.7 | chandra | ccd3 | 208.5 | 899.25 | 9.04234 | 4.57071 | 0.000183014 | 9.251e-05 | 5.25782 | 0.999986 | 1.1627 | 0.923162 | 170.731 | 9.51344 | 4.92449 | 3.25229 | -0.204506 | 0.557249 | F | F | 1.73e+20 | 2.83536e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 6 | X095941.08+014727.2 | chandra | ccd3 | 728.5 | 400.278 | 8.74592 | 4.1225 | 0.000177015 | 8.34382e-05 | 17.3508 | 1 | 0.492 | 0.492 | 138.17 | 3.64374 | 0.915307 | 7.83061 | 0.790689 | 0.606705 | F | F | 1.75e+20 | 2.21256e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 15 | X095901.96+014832.1 | chandra | ccd1 | 895.611 | 349.056 | 8.05051 | 4.27872 | 0.00016294 | 8.66001e-05 | 5.76585 | 0.999993 | 1.08792 | 0.927649 | 88.807 | 7.38765 | 1.49458 | 5.70034 | 0.584546 | 0.670088 | F | F | 1.74e+20 | 2.30553e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 5 | X095933.14+014202.6 | chandra | ccd2 | 806.5 | 769.375 | 7.52536 | 3.95804 | 0.000152321 | 8.01146e-05 | 10.9231 | 1 | 0.526761 | 0.492 | 115.453 | 3.58782 | 3.92089 | 3.60447 | -0.0420477 | 0.532005 | F | F | 1.78e+20 | 1.89622e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 8 | X095940.32+014543.0 | chandra | ccd3 | 751.625 | 188.5 | 6.70559 | 3.95804 | 0.000135719 | 8.01096e-05 | 5.89388 | 0.999991 | 1.02959 | 0.492 | 60.8264 | 2.87577 | 1.8382 | 4.86739 | 0.451741 | 0.654559 | A | F | 1.76e+20 | 1.69058e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 12 | X095926.64+015000.1 | chandra | ccd1 | 143.643 | 528.071 | 6.74592 | 3.78388 | 0.000136536 | 7.65847e-05 | 13.3831 | 1 | 0.492 | 0.492 | 32.6882 | 4.56898 | 1.91531 | 4.83061 | 0.432158 | 0.618245 | F | F | 1.74e+20 | 1.83801e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 11 | X095933.11+015106.3 | chandra | ccd3 | 971.357 | 845.5 | 10.9401 | 4.57071 | 0.000221424 | 9.251e-05 | 10.6264 | 1 | 0.707734 | 0.492 | 37.4495 | 5.73686 | 2.58781 | 8.35227 | 0.526912 | 0.475844 | F | F | 1.73e+20 | 2.85183e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 16 | X095915.82+015154.6 | chandra | ccd1 | 473.214 | 760.786 | 7.26958 | 3.95804 | 0.000147134 | 8.01096e-05 | 8.50594 | 1 | 1.02638 | 0.492 | 54.3961 | 7.2199 | 2.83768 | 4.47247 | 0.223633 | 0.5607 | A | F | 1.73e+20 | 2.0509e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 14 | X095919.66+015242.6 | chandra | ccd1 | 356.214 | 858.357 | 7.40682 | 3.95804 | 0.000149912 | 8.01096e-05 | 9.61701 | 1 | 0.892066 | 0.78121 | 85.6922 | 7.59924 | 3.77756 | 4.62926 | 0.101311 | 0.497641 | F | F | 1.72e+20 | 2.08564e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 2 | X095943.56+014408.3 | chandra | ccd2 | 489 | 1025 | 7.59202 | 3.95804 | 0.00015367 | 8.01146e-05 | 11.886 | 1 | 0.511548 | 0.492 | 86.4375 | 3.9064 | 0 | 7.59202 | 1 | 0.745106 | F | F | 1.77e+20 | 2.3152e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 10 | X095951.37+014049.3 | chandra | ccd2 | 250.833 | 620.5 | 1.131 | 3.78388 | 2.28925e-05 | 7.65895e-05 | 0.466852 | 0.761809 | 0.639127 | 0.492 | 90 | 7.29637 | 1.76127 | -0.630279 | -1 | 3.07403 | F | F | 1.78e+20 | 3.3336e-16 | 1 | dx |
| Report | srcpi bgdpi arf | 9 | X095958.79+014813.4 | chandra | ccd3 | 189 | 494.167 | 5.13541 | 3.59808 | 0.000103939 | 7.2824e-05 | 5.52293 | 0.999966 | 0.955349 | 0.649955 | 33.8941 | 7.97026 | 0.654164 | 4.53888 | 0.748062 | 0.87674 | F | F | 1.75e+20 | 1.53959e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 7 | X095906.56+014143.0 | chandra | ccd0 | 588.562 | 534.688 | 18.0414 | 5.55522 | 0.000365176 | 0.000112443 | 12.8914 | 1 | 0.884831 | 0.852377 | 60.9454 | 6.7167 | 9.34714 | 8.69429 | -0.0361866 | 0.309633 | F | F | 1.78e+20 | 6.00989e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 9 | X095914.90+014245.5 | chandra | ccd0 | 334.821 | 662.136 | 11.9102 | 3.45112 | 0.000241075 | 6.98542e-05 | 4.932 | 0.99996 | 1.11362 | 0.431769 | 8.27225 | 4.41755 | 0.697839 | 10.4293 | 0.874569 | 0.549866 | F | F | 1.77e+20 | 3.22196e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 10 | X095913.11+014529.6 | chandra | ccd0 | 389.335 | 995.763 | 13.6972 | 3.70097 | 0.000277246 | 7.49116e-05 | 5.67199 | 0.999997 | 1.32109 | 0.440311 | 358.111 | 3.93433 | 3.6049 | 9.23803 | 0.438617 | 0.414323 | F | F | 1.76e+20 | 3.47994e-15 | 1 | dsx |
| Report | srcpi bgdpi arf | 11 | X095908.78+014552.8 | chandra | ccd0 | 520.833 | 1042.39 | 14.5613 | 4.96863 | 0.000294734 | 0.00010057 | 21.9834 | 1 | 0.664716 | 0.492 | 82.2768 | 5.03402 | 12.9373 | 1.62394 | -0.776951 | 0.434837 | F | F | 1.76e+20 | 3.97047e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 12 | X095915.67+013806.1 | chandra | ccd0 | 310.75 | 93.6667 | 10.6694 | 4.84057 | 0.000215959 | 9.7978e-05 | 5.84623 | 0.999998 | 1.81725 | 1.2997 | 144.138 | 8.06942 | 7.21276 | 3.57773 | -0.336874 | 0.476536 | F | F | 1.8e+20 | 3.13972e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 13 | X095919.61+014006.9 | chandra | ccd0 | 190.786 | 339.357 | 6.28372 | 3.78388 | 0.000127189 | 7.65895e-05 | 7.42467 | 0.999999 | 0.814708 | 0.492 | 129.402 | 5.82919 | 2.89767 | 3.38605 | 0.0777205 | 0.611098 | A | F | 1.79e+20 | 1.81481e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 14 | X095909.01+014243.8 | chandra | ccd0 | 513.833 | 658.278 | 7.91768 | 4.1225 | 0.000160262 | 8.34434e-05 | 7.61064 | 1 | 1.07904 | 0.530407 | 145.252 | 5.6645 | 5.83349 | 2.12582 | -0.465828 | 0.576899 | A | F | 1.77e+20 | 2.12199e-15 | 1 | dx |
| Report | srcpi bgdpi arf | 15 | X095913.91+014234.2 | chandra | ccd0 | 364.871 | 639.103 | 20.2499 | 4.49999 | 0.000409878 | 9.10842e-05 | 8.38545 | 1 | 0.95206 | 0.95206 | 0 | 4.72115 | 13.8145 | 3.64517 | -0.582448 | 0.370023 | F | F | 1.77e+20 | 5.19286e-15 | 1 | dsx |
counts and rate are bgd.-subtracted, based on simple spatial fitting (if done) or extracted counts from aperture otherwise (N.B., in either case aperture counts are given csv file).
cntserr, rateerr = Error on (source) counts and count rate, based on error in total counts
SNR = signal-to-noise ratio, computed using Nsrc/sqrt(Nbgd)
poisprob = Poisson probability of observing total counts given bgd. counts
sigmaj, sigmin = source extent (from detection output or spatial fitting) in units of arcsecs.
incang = position angle of source (inclination from x-axis)
cnts_soft = bgd.-subtracted counts in soft band (0.50 - 2.00 KeV, always taken directly from source aperture rather than model fitting)
cnts_hard = bgd.-subtracted counts in hard band (2.00 - 7.99 KeV, always taken directly from source aperture rather than model fitting)
hr, hr_err = hardness ratio ([cnts_hard-cnts_soft]/[cnts_hard+cnts_soft]) and error
ext = source extension flag: F = false (not extended), T = true (extended), A = asymetric (ratio of sigmaj/sigmin > 1 + x, where x = 0.5 by default)
var = variability flag: U = unknown, F = false (is not variable), T = true
N_H = Galactic column density as determined from LHEASOFT nh program
flux = flux determined from count rate using pimms (in the 0.30-8.00 keV bandpass for a power-law model with ph. index = 1.8)
vign = vignetting correction
Flags: d = detection parameters, s = simple spatial fitting parameters,
b = simple spatial fitting failed, p = poor simple spatial fit, x = extracted events parameters, t = temporal anaylsis parameters,
i = psf spatial fitting parameters, f = spectral fitting parameters,
c = source is confused, u = user-defined source, v = detected source coincident with user-defined source, r = source is in region-of-interest