[Mon Jun 3 16:12:58 2013] Detection parameters: Position = (294.2, 257.6) = 8 21 56.99 -43 1 32.8 Extent = 10.9" x 10.9", rotation angle = 0 degrees Source counts = 562.2 +/- 42.0 Background counts = 394.9 Rate = 0.03 +/- 0.002 [Mon Jun 3 16:13:14 2013] Off-axis axis estimate = 2.98' [Mon Jun 3 16:17:19 2013] Using EEF radius (= 7.92 ")to estimate initial spatial extent for simple fitting [Mon Jun 3 16:17:19 2013] Initial guess for spatial extent in simple fitting = 7.92" [Mon Jun 3 16:17:19 2013] source mask rpix=1.8, npix_max = 21, mask sum = 19, frac = 0.882 [Mon Jun 3 16:17:19 2013] Giving source the simple spatial ID 138 for pass 0, mean size = 7.92" [Mon Jun 3 16:18:28 2013] Vigneting correction estimate = 1.000000 [Mon Jun 3 16:18:28 2013] Source flux estimate in the 0.3-8.0 bandpass, Gamma=1.800000 = 0 [Mon Jun 3 16:18:28 2013] Assessing source extent using major [Mon Jun 3 16:18:28 2013] Source does appear to be extended [Mon Jun 3 16:18:28 2013] Computing asymmetry using major and minor axis, asym = 1.00 [Mon Jun 3 16:18:29 2013] Source is confused with source 49 [Mon Jun 3 16:20:43 2013] Using EEF radius (= 7.92 ")to estimate initial spatial extent for simple fitting [Mon Jun 3 16:20:43 2013] Initial guess for spatial extent in simple fitting = 7.92" [Mon Jun 3 16:20:43 2013] source mask rpix=1.8, npix_max = 21, mask sum = 19, frac = 0.882 [Mon Jun 3 16:20:43 2013] Giving source the simple spatial ID 134 for pass 1, mean size = 7.92" [Mon Jun 3 16:21:50 2013] Spatial fit model total counts = 18260.400000, observed total counts = 17846.000000 [Mon Jun 3 16:21:50 2013] Offset between fit and detection position for source 309 = 4.785310 pixels [Mon Jun 3 16:21:50 2013] Warning, changing simple spatial fit ID from 134 to 35 [Mon Jun 3 16:21:50 2013] 16245.620000 total counts/ 15000.200000 bgd. counts: snr = 10.168744 Spatial fit parameters: Offset between fit and detection position for source 309 = 4.785310 pixels Position = (297.0, 261.5) = 8 21 55.88 -43 1 18.6 Extent = 11.3 (10.3-12.4)", rotation angle = 0 Source counts = 1245.4 +/- 127.5 Background counts = 15000.2 Rate = 0.06 +/- 0.006 [Mon Jun 3 16:21:51 2013] Vigneting correction estimate = 1.000000 [Mon Jun 3 16:21:51 2013] Source flux estimate in the 0.3-8.0 bandpass, Gamma=1.800000 = 0 [Mon Jun 3 16:21:51 2013] Assessing source extent using major axis lower bound [Mon Jun 3 16:21:51 2013] Source does appear to be extended [Mon Jun 3 16:21:51 2013] Computing asymmetry using major and minor axis, asym = 1.00 [Mon Jun 3 16:25:38 2013] Counts = 1245.420000, rescaling region sizes by 2.000000 [Mon Jun 3 16:25:38 2013] XMMSAS src. selection expression = ellipse(25787.878600, 22699.111600, 1361.028039, 1361.028039, 0.000000, X, Y) [Mon Jun 3 16:25:38 2013] Not overwriting source region fullrun_mos1_xmm0650221301_pi300-10000_pass1_cl_src309_src.reg [Mon Jun 3 16:25:38 2013] Extracting stamp from image fullrun_mos1_xmm0650221301_pi300-10000_cl_sm2.00.img.gz, (219, 183) - (375, 340) [Mon Jun 3 16:25:39 2013] XMMSAS bgd. selection expression = annulus(25787.878600, 22699.111600, 4536.760131, 9073.520261, X, Y) && !ellipse(25422.850340, 23950.290200, 381.964811, 381.964811, 0.000000, X, Y) && !ellipse(17021.750000, 25190.846800, 1292.800037, 1292.800037, 0.000000, X, Y) && !ellipse(17570.578415, 27108.902588, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(15419.894000, 15848.348000, 1998.792058, 1998.792058, 0.000000, X, Y) && !ellipse(18955.692645, 23740.803447, 1430.760041, 1430.760041, 0.000000, X, Y) && !ellipse(30157.194824, 21625.572800, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20487.780000, 28859.540000, 1440.080041, 1440.080041, 0.000000, X, Y) && !ellipse(18945.224000, 23053.063200, 1521.328044, 1204.448035, 227.432000, X, Y) && !ellipse(16485.576407, 25209.964431, 1009.814532, 282.984525, 90.000000, X, Y) && !ellipse(20572.956000, 22733.313800, 1432.976041, 1432.976041, 0.000000, X, Y) && !ellipse(30728.834000, 29266.472000, 1445.456042, 1445.456042, 0.000000, X, Y) && !ellipse(26305.062000, 22147.902000, 449.201613, 449.201613, 0.000000, X, Y) && !ellipse(20215.820000, 22817.734000, 1418.736041, 1418.736041, 0.000000, X, Y) && !ellipse(31277.831600, 30554.596000, 1516.328044, 1516.328044, 0.000000, X, Y) && !ellipse(20487.224000, 27720.044000, 1393.952040, 1393.952040, 0.000000, X, Y) && !ellipse(30654.059662, 30149.487274, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30498.711243, 30660.476868, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21175.790000, 28276.184000, 1366.776039, 535.483215, 339.082000, X, Y) && !ellipse(21179.265030, 29025.276184, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26790.994690, 24763.218719, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(11327.594000, 22526.696000, 12415.392357, 12415.392357, 0.000000, X, Y) && !ellipse(21648.408707, 28659.107819, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30750.507800, 32737.062800, 1053.576030, 1053.576030, 0.000000, X, Y) && !ellipse(30395.733276, 31526.850098, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(19867.519600, 27378.352000, 1159.840033, 1159.840033, 0.000000, X, Y) && !ellipse(19415.069748, 27755.572144, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(19566.512200, 26729.276200, 548.615216, 548.615216, 0.000000, X, Y) && !ellipse(25625.452000, 29216.222000, 1216.680035, 1216.680035, 0.000000, X, Y) && !ellipse(25713.844000, 22778.434000, 1275.984037, 1275.984037, 0.000000, X, Y) && !ellipse(18762.511337, 25018.741394, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34057.244000, 32183.852000, 1071.136031, 1071.136031, 0.000000, X, Y) && !ellipse(19978.994000, 22856.180000, 1480.936043, 1480.936043, 0.000000, X, Y) && !ellipse(16418.954000, 25550.682000, 9729.264280, 9729.264280, 0.000000, X, Y) && !ellipse(32734.390000, 31844.730800, 3153.840091, 1509.128043, -0.000000, X, Y) && !ellipse(25179.147900, 22739.525400, 1245.232036, 1245.232036, 0.000000, X, Y) && !ellipse(24846.068000, 22699.892000, 1268.392036, 1268.392036, 0.000000, X, Y) && !ellipse(20420.939545, 21582.481674, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34371.766000, 32278.910000, 3248.800093, 3248.800093, 0.000000, X, Y) && !ellipse(31859.108000, 29010.492000, 1464.872042, 1464.872042, 336.349000, X, Y) && !ellipse(18963.096146, 27695.239258, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(22329.127686, 29668.666779, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25220.300598, 27480.492523, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18520.144333, 23253.892975, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18271.839497, 25162.025075, 696.385603, 473.450218, 69.985968, X, Y) && !ellipse(19820.416000, 25160.112800, 1156.456033, 1156.456033, 0.000000, X, Y) && !ellipse(18868.588000, 28530.956000, 1478.960043, 1237.192036, 351.023890, X, Y) && !ellipse(21462.619049, 19462.647873, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32387.680000, 31829.664000, 1576.920045, 1576.920045, 0.000000, X, Y) && !ellipse(15956.675049, 19628.423920, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26534.492310, 23715.398132, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21688.354000, 22202.786000, 1418.816041, 1418.816041, 0.000000, X, Y) && !ellipse(24078.718200, 22682.524800, 1292.704037, 1292.704037, 0.000000, X, Y) && !ellipse(31442.043152, 28841.367615, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25492.350000, 26959.132000, 1142.736033, 1142.736033, 0.000000, X, Y) && !ellipse(15175.918000, 25185.620000, 5113.704147, 5113.704147, 0.000000, X, Y) && !ellipse(26567.698761, 22685.023743, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21159.006000, 22482.144000, 716.486421, 716.486421, 0.000000, X, Y) && !ellipse(21902.818000, 20109.190000, 695.736820, 695.736820, 0.000000, X, Y) && !ellipse(22744.064000, 29763.868000, 1325.136038, 1325.136038, 0.000000, X, Y) && !ellipse(34576.366000, 32685.914000, 2142.272062, 2142.272062, 0.000000, X, Y) && !ellipse(22931.750000, 29492.998000, 2611.920075, 2611.920075, 0.000000, X, Y) && !ellipse(22510.997192, 28997.764771, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20441.915604, 21037.216980, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25570.580000, 26682.060800, 1066.768031, 1066.768031, 0.000000, X, Y) && !ellipse(28086.098000, 24227.838620, 1233.648035, 1233.648035, 0.000000, X, Y) && !ellipse(16043.331223, 25962.474213, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21958.255936, 13252.754715, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32495.734009, 19514.067825, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(15163.170600, 26863.201800, 1741.088050, 473.365614, 69.232000, X, Y) && !ellipse(16403.562943, 24865.901978, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24230.232000, 22214.462000, 2138.176062, 2138.176062, 0.000000, X, Y) && !ellipse(29896.022247, 29781.906433, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18216.423584, 18034.009796, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23837.374000, 28844.686000, 1305.960038, 1305.960038, 0.000000, X, Y) && !ellipse(15464.624000, 19572.872000, 1484.648043, 1484.648043, 0.000000, X, Y) && !ellipse(20544.472748, 23487.299255, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21351.265793, 24919.204346, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(16323.035904, 14832.319260, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27333.560000, 29866.496000, 1272.248037, 1272.248037, 0.000000, X, Y) && !ellipse(22086.391800, 19718.026000, 3054.048088, 3054.048088, 0.000000, X, Y) && !ellipse(30059.099457, 23752.571198, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(15443.560000, 25803.150200, 1680.224048, 1680.224048, 0.000000, X, Y) && !ellipse(18123.214798, 17185.981491, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28927.518000, 24181.654800, 1233.648035, 1233.648035, 0.000000, X, Y) && !ellipse(16731.087357, 19422.117523, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(16149.333267, 26900.020813, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26351.507690, 15599.795303, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26720.267365, 16203.045837, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24761.344269, 18287.732361, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34443.686523, 21699.533951, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27525.184631, 21542.453125, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20954.512817, 18709.640411, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27553.726196, 24281.992004, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32359.352000, 28107.000000, 2066.528059, 2066.528059, 0.000000, X, Y) && !ellipse(14760.506000, 15467.166000, 2082.720060, 2082.720060, 0.000000, X, Y) && !ellipse(22333.221741, 20602.340439, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26466.037689, 16657.898819, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(17155.431396, 15084.523148, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25982.142670, 28495.056213, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(31190.362305, 22013.990311, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(33364.433044, 28574.946045, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23717.708008, 13366.502808, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(13118.038000, 29176.892800, 11623.584334, 11623.584334, 0.000000, X, Y) && !ellipse(16003.000000, 16498.537323, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27340.867188, 16312.531281, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18002.888870, 23612.616638, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30846.897095, 20956.522675, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34706.438843, 23863.269989, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(22386.542000, 21866.584000, 2837.632082, 2837.632082, 0.000000, X, Y) && !ellipse(30130.923309, 24184.263031, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(16525.929260, 27000.643768, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20035.743912, 12827.018112, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23719.885132, 23193.860107, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(31593.844452, 27128.300232, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26758.417480, 25414.760254, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(19403.342000, 25815.184000, 1447.448042, 845.720024, 142.126000, X, Y) && !ellipse(26619.532000, 15136.536000, 1724.760050, 1724.760050, 0.000000, X, Y) && !ellipse(27962.762665, 16395.305801, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34225.764374, 23615.837189, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28883.343628, 29781.670135, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26159.315430, 16028.756439, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34491.216858, 22748.882507, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(33722.256653, 22569.909637, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24314.054138, 14122.653824, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30831.975830, 26316.471924, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18818.718307, 14928.626465, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27896.036469, 28863.691101, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18252.802000, 25500.414000, 1509.168043, 1509.168043, 0.000000, X, Y) && !ellipse(22621.488892, 19719.864456, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(19208.817780, 17082.893341, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25912.730000, 23831.180000, 1174.088034, 1174.088034, 0.000000, X, Y) && !ellipse(21258.520309, 19965.660431, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(34840.313385, 21367.108353, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25812.494263, 16721.267731, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25189.181000, 17514.338257, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(26567.735931, 29303.860443, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23809.423340, 14204.480499, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27199.601044, 28381.962585, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25299.988647, 25250.044891, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20228.682200, 20582.286000, 1517.368044, 1517.368044, 0.000000, X, Y) && !ellipse(35012.117676, 22935.162018, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(18447.930191, 18142.681473, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(22535.917297, 20158.539017, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(16652.478577, 14909.678848, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(17175.024185, 17535.935593, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(17586.746216, 17794.350922, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(17695.485596, 26569.143097, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(22767.167694, 19314.900803, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(25626.745758, 27881.391327, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(17541.934631, 15436.380905, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24567.904144, 28485.102509, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(35354.773102, 23354.598236, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(33946.927887, 22918.775177, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20564.494324, 13951.713745, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32154.894623, 30491.032898, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(19820.178101, 15861.079391, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24781.195923, 27960.343933, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(31875.811218, 27719.832794, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23561.804000, 28730.952000, 1321.368038, 1321.368038, 0.000000, X, Y) && !ellipse(17288.586426, 20085.341187, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(16758.010681, 20134.238861, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27076.234000, 24270.976000, 1038.992030, 1038.992030, 0.000000, X, Y) && !ellipse(20476.501343, 14542.556000, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(15892.359619, 28655.135895, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20170.907471, 15147.391586, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(19831.000000, 16817.004105, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(33353.454498, 23867.687958, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28743.962555, 18781.034149, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24301.803833, 14559.696869, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30324.687347, 22175.903290, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30754.148956, 21540.708771, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(22515.290375, 21328.270584, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24329.371002, 13359.372726, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(20636.948746, 19626.110062, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32105.818000, 20346.796000, 1030.608030, 1030.608030, 0.000000, X, Y) && !ellipse(16605.712891, 18498.480621, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27630.472473, 17162.318542, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(15860.208542, 28137.256500, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28439.555481, 29824.976318, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23692.158661, 14733.874756, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32512.242981, 29972.811005, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28965.984070, 32179.103180, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28180.376831, 24924.785217, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(27601.086609, 18350.002090, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21260.015091, 21171.650406, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(32948.182861, 27892.324738, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(21737.551315, 21445.456940, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(24388.405579, 18702.960358, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(23317.148000, 22054.702000, 1279.152037, 1279.152037, 0.000000, X, Y) && !ellipse(26278.154541, 29866.333710, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(35339.612885, 21087.492615, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(30248.740234, 14990.397049, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(31570.368683, 22487.874542, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(28006.127258, 31890.254578, 870.000000, 870.000000, 0.000000, X, Y) && !ellipse(17592.958984, 22329.422394, 1740.000000, 1740.000000, 0.000000, X, Y) && !ellipse(34615.373993, 30125.464569, 870.000000, 870.000000, 0.000000, X, Y) [Mon Jun 3 16:25:39 2013] Writing fullrun_mos1_xmm0650221301_pi300-10000_pass1_cl_src309.gif