# Summary of K2 Program GO10005

Title: Characterizing the Optical Emission from 3C273 and other quasars

PI: Wehrle, Ann E. (Space Science Institute)
CoIs: Carini, Michael Thomas; Wiita, Paul J

We propose to measure the  long and short cadence light curves of the archetypal quasar 3C273 and to measure the long cadence light curves of a large statistically complete sample of 185 quasars drawn from the Sloan Digital Sky Survey
and of 65 bright quasars drawn from other surveys in Fields 8 and 10. The first goal is to characterize the variability of 3C 273 on timescales from minutes to months using continuous observations for 75 days, which has never been done before. Our  second goal is to determine the origin of optical emission in the quasars at the time of K2 observations. The three candidate origins are: 1) a single dominant synchrotron-emitting region in a jet; 2) multiple synchrotron-emitting regions in a jet; and 3) an accretion disk (AD) with one or more thermal emitting regions. Our third  goal is to see how the optical variability amplitude and power spectral densities (PSDs) of the three main classes of quasars --blazars, radio-loud quasars, and radio-quiet quasars --differ on minute-to-months timescales. The candidate origins for optical emission from radio-loud quasars are the same as those for blazars, but without enhanced relativistic beaming in the jet. Optical variations in radio-quiet quasars may originate in an AD with multiple thermal emission regions. We will measure the PSDs of the light curves and determine the PSD slopes which are related to the underlying variability processes, such as turbulence in the relativistic jets or stochastic fluctuations in thermal emission from segments of the AD.

# Targets requested by this program that have been observed (151)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
201079736, 181.069432, -7.169162, 16.305, GO10001_LC|GO10005_LC|GO10057_LC
201101375, 183.172801, -6.552753, 16.801, GO10001_LC|GO10005_LC
201141392, 183.477411, -5.505411, 15.477, GO10070_LC|GO10065_LC|GO10001_LC|GO10005_LC
201142899, 180.642611, -5.467366, 17.026, GO10001_LC|GO10005_LC|GO10057_LC
201149624, 181.221051, -5.303726, 16.256, GO10001_LC|GO10005_LC
201218966, 180.309797, -3.678031, 14.973, GO10001_LC|GO10005_LC
201222309, 184.730801, -3.625306, 18.881, GO10065_LC|GO10005_LC|GO10052_LC
201232877, 182.010512, -3.468153, 16.765, GO10005_LC
201234761, 181.220376, -3.440546, 18.066, GO10005_LC|GO10052_LC
201247917, 184.940458, -3.239975, 17.091, GO10065_LC|GO10001_LC|GO10005_LC
201253776, 182.861739, -3.150743, 16.589, GO10070_LC|GO10005_LC
201277001, 184.324206, -2.798278, 18.57, GO10065_LC|GO10005_LC|GO10052_LC
201282310, 184.013575, -2.717968, 17.347, GO10065_LC|GO10001_LC|GO10005_LC
201296279, 181.85738, -2.50685, 18.175, GO10018_LC|GO10005_LC|GO10048_LC|GO10052_LC|GO10048_SC
201304783, 182.393722, -2.379218, 17.978, GO10001_LC|GO10005_LC|GO10052_LC
201327005, 185.313894, -2.04819, 17.954, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
201334320, 181.250289, -1.93993, 17.747, GO10001_LC|GO10005_LC|GO10052_LC
201336803, 180.897289, -1.903667, 17.976, GO10001_LC|GO10005_LC|GO10052_LC
201337630, 180.457338, -1.890982, 16.5, GO10001_LC|GO10005_LC|GO10042_LC
201343269, 184.786411, -1.808064, 16.559, GO10070_LC|GO10065_LC|GO10001_LC|GO10005_LC
201344372, 180.719104, -1.791133, 18.159, GO10005_LC|GO10052_LC
201373109, 181.092215, -1.36761, 16.571, GO10070_LC|GO10001_LC|GO10005_LC|GO10042_LC
201375481, 184.645537, -1.331761, 16.626, GO10065_LC|GO10001_LC|GO10005_LC|GO10057_LC
201375979, 184.223338, -1.324381, 18.662, GO10065_LC|GO10005_LC|GO10052_LC
201378349, 183.442549, -1.287697, 17.785, GO10001_LC|GO10005_LC|GO10052_LC
201391353, 185.052651, -1.092109, 17.999, GO10005_LC
201397340, 184.918221, -1.002084, 17.528, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
201415090, 184.79683, -0.729281, 18.449, GO10065_LC|GO10005_LC|GO10006_LC|GO10052_LC
201422158, 180.83784, -0.622466, 17.881, GO10001_LC|GO10005_LC|GO10006_LC|GO10052_LC
201422521, 181.30273, -0.617186, 17.972, GO10001_LC|GO10005_LC|GO10052_LC
201425281, 183.957555, -0.575593, 17.381, GO10005_LC|GO10052_LC
201429205, 183.800747, -0.520089, 18.461, GO10005_LC|GO10052_LC
201440598, 180.909703, -0.352778, 17.093, GO10005_LC
201445884, 180.425963, -0.27773, 18.184, GO10005_LC|GO10052_LC
201456325, 185.574369, -0.128806, 17.41, GO10005_LC
201459408, 181.782497, -0.083049, 18.059, GO10005_LC|GO10006_LC|GO10052_LC
201462601, 182.824336, -0.036778, 17.622, GO10001_LC|GO10005_LC
201466777, 183.44808, 0.024935, 17.955, GO10001_LC|GO10005_LC|GO10052_LC
201470107, 185.164424, 0.074331, 17.86, GO10001_LC|GO10005_LC|GO10052_LC
201470993, 185.379368, 0.08696, 17.362, GO10070_LC|GO10005_LC
201478712, 182.56712, 0.201403, 16.869, GO10001_LC|GO10005_LC|GO10052_LC
201490359, 180.583499, 0.378359, 17.712, GO10005_LC
201497603, 181.87398, 0.48683, 18.681, GO10005_LC|GO10052_LC
201505269, 182.702093, 0.602294, 17.467, GO10001_LC|GO10005_LC|GO10052_LC
201515155, 181.540423, 0.756268, 17.493, GO10005_LC|GO10052_LC
201515779, 182.384415, 0.765537, 17.176, GO10001_LC|GO10005_LC|GO10052_LC
201533822, 184.615805, 1.043691, 16.876, GO10070_LC|GO10005_LC
201536935, 185.352627, 1.090891, 17.875, GO10001_LC|GO10005_LC|GO10052_LC
201555112, 183.995031, 1.364813, 17.334, GO10070_LC|GO10001_LC|GO10005_LC
201556542, 183.740291, 1.385234, 18.344, GO10005_LC|GO10052_LC
201597181, 184.732501, 2.000574, 17.655, GO10001_LC|GO10005_LC|GO10052_LC
201623717, 185.030731, 2.408759, 16.823, GO10070_LC|GO10001_LC|GO10005_LC|GO10052_LC
201628711, 184.235635, 2.487608, 18.115, GO10005_LC|GO10052_LC
201631953, 184.769418, 2.538105, 18.141, GO10005_LC|GO10052_LC
201641087, 185.850533, 2.679038, 15.458, GO10001_LC|GO10005_LC
228743137, 189.534945, -9.236561, 15.89, GO10070_LC|GO10001_LC|GO10005_LC
228765936, 191.720068, -8.220244, 17.774, GO10005_LC|GO10052_LC
228782429, 191.517635, -7.512944, 19.819, GO10005_LC
228790994, 184.119414, -7.153618, 16.678, GO10065_LC|GO10001_LC|GO10005_LC
228791092, 190.982486, -7.149039, 18.863, GO10005_LC|GO10052_LC
228792700, 192.984933, -7.083718, 16.387, GO10001_LC|GO10005_LC
228796017, 185.378572, -6.949651, 18.0, GO10065_LC|GO10005_LC
228846065, 190.068326, -4.858572, 18.158, GO10065_LC|GO10005_LC|GO10052_LC
228858861, 186.363297, -4.315936, 15.296, GO10065_LC|GO10001_LC|GO10005_LC
228870417, 190.080287, -3.82206, 16.561, GO10065_LC|GO10001_LC|GO10005_LC
228885606, 189.009729, -3.524934, 16.923, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
228894262, 193.816469, -3.37707, 17.949, GO10001_LC|GO10005_LC|GO10052_LC
228909095, 187.358163, -3.117351, 17.91, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
228918115, 192.248837, -2.958573, 18.304, GO10005_LC|GO10052_LC
228919254, 183.369921, -2.938292, 18.011, GO10065_LC|GO10005_LC|GO10052_LC
228924414, 183.036826, -2.848965, 17.963, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
228925664, 192.676845, -2.825425, 14.75, GO10070_LC|GO10001_LC|GO10005_LC
228927163, 186.39498, -2.799218, 17.081, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
228927555, 190.488852, -2.792041, 17.166, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
228928578, 190.05519, -2.774863, 17.857, GO10005_LC|GO10052_LC
228936328, 192.561149, -2.637114, 18.056, GO10005_LC|GO10052_LC
228944943, 191.096098, -2.482814, 16.953, GO10001_LC|GO10005_LC
228945281, 189.166084, -2.476675, 17.802, GO10065_LC|GO10001_LC|GO10005_LC
228947587, 189.201905, -2.434814, 17.489, GO10065_LC|GO10001_LC|GO10005_LC
228949527, 188.000056, -2.401324, 16.888, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC|GO10057_LC
228950013, 192.964181, -2.392722, 16.437, GO10001_LC|GO10005_LC
228950078, 189.866448, -2.391301, 19.515, GO10005_LC
228950854, 192.267342, -2.376676, 17.432, GO10001_LC|GO10005_LC
228953832, 192.463809, -2.323107, 17.702, GO10001_LC|GO10005_LC|GO10052_LC
228969016, 186.996632, -2.051009, 18.087, GO10065_LC|GO10005_LC|GO10052_LC
228973038, 193.394896, -1.977161, 17.334, GO10001_LC|GO10005_LC|GO10052_LC
228975477, 192.730343, -1.932441, 17.633, GO10001_LC|GO10005_LC
228976627, 186.335586, -1.912472, 18.512, GO10065_LC|GO10005_LC|GO10052_LC
228982318, 183.730848, -1.808561, 18.525, GO10065_LC|GO10005_LC|GO10052_LC
228983718, 187.712699, -1.784139, 17.681, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
228993447, 188.194265, -1.61108, 18.069, GO10065_LC|GO10005_LC|GO10052_LC
228996547, 186.752462, -1.553779, 18.29, GO10065_LC|GO10005_LC|GO10052_LC
229009479, 190.737655, -1.321946, 17.388, GO10001_LC|GO10005_LC
229012103, 194.159959, -1.27266, 17.931, GO10001_LC|GO10005_LC
229014963, 183.70791, -1.212501, 18.263, GO10065_LC|GO10005_LC|GO10006_LC|GO10052_LC
229015101, 186.60034, -1.209606, 17.313, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
229016529, 189.999155, -1.179144, 18.194, GO10005_LC|GO10052_LC
229017436, 192.249652, -1.159855, 15.166, GO10070_LC|GO10001_LC|GO10005_LC
229021507, 191.065966, -1.074921, 18.294, GO10018_LC|GO10005_LC|GO10052_LC
229021696, 187.200906, -1.070692, 18.194, GO10065_LC|GO10005_LC|GO10052_LC
229022827, 187.539973, -1.045714, 17.431, GO10070_LC|GO10065_LC|GO10001_LC|GO10005_LC
229025243, 189.733751, -0.991904, 18.319, GO10005_LC|GO10052_LC
229042501, 188.164672, -0.60309, 18.365, GO10065_LC|GO10005_LC|GO10052_LC
229042811, 189.456842, -0.595545, 19.089, GO10005_LC|GO10052_LC
229042966, 187.289687, -0.591687, 18.333, GO10065_LC|GO10005_LC|GO10052_LC
229060529, 186.716714, -0.199873, 17.887, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
229062208, 191.352497, -0.160586, 17.616, GO10001_LC|GO10005_LC|GO10052_LC
229069260, 186.56827, 0.010098, 17.822, GO10065_LC|GO10001_LC|GO10005_LC|GO10052_LC
229077703, 190.511072, 0.208047, 18.37, GO10005_LC|GO10052_LC
229080245, 190.998416, 0.276525, 17.63, GO10001_LC|GO10005_LC
229088236, 191.595826, 0.477773, 16.877, GO10070_LC|GO10001_LC|GO10005_LC
229100046, 186.510227, 0.777814, 16.891, GO10070_LC|GO10001_LC|GO10005_LC|GO10042_LC
229102461, 191.048092, 0.844013, 18.005, GO10005_LC|GO10052_LC
229103029, 190.044823, 0.858148, 18.349, GO10005_LC|GO10052_LC
229108933, 190.850973, 1.007881, 17.122, GO10001_LC|GO10005_LC
229111512, 189.434957, 1.075722, 18.579, GO10018_LC|GO10005_LC|GO10052_LC
229111869, 191.464364, 1.084732, 18.403, GO10005_LC|GO10052_LC
229116460, 189.797894, 1.203869, 17.605, GO10001_LC|GO10005_LC|GO10052_LC
229117161, 191.510562, 1.221882, 18.199, GO10005_LC|GO10052_LC
229118509, 187.708475, 1.256286, 14.614, GO10001_LC|GO10005_LC
229120591, 190.235498, 1.305484, 17.755, GO10001_LC|GO10005_LC|GO10052_LC
229122131, 191.460774, 1.340997, 16.257, GO10070_LC|GO10001_LC|GO10005_LC
229141886, 190.132458, 1.804533, 17.432, GO10001_LC|GO10005_LC
229142194, 185.482383, 1.812274, 18.066, GO10005_LC|GO10052_LC
229147675, 191.318576, 1.944767, 18.204, GO10005_LC|GO10052_LC
229151988, 187.277896, 2.052406, 12.737, GO10001_LC|GO10005_LC|GO10057_LC|GO10001_SC|GO10005_SC
229155313, 190.696494, 2.138188, 17.485, GO10001_LC|GO10005_LC|GO10052_LC
229157953, 186.825337, 2.207097, 18.156, GO10005_LC|GO10052_LC
229160687, 189.616894, 2.280996, 18.373, GO10005_LC|GO10052_LC
229164781, 189.570291, 2.394143, 18.484, GO10005_LC|GO10052_LC
229167825, 187.442965, 2.478296, 18.023, GO10005_LC|GO10052_LC
229172570, 186.734605, 2.609355, 18.254, GO10005_LC|GO10052_LC
229173516, 185.846018, 2.635797, 17.948, GO10001_LC|GO10005_LC|GO10052_LC
229187557, 185.26753, 3.058694, 18.323, GO10005_LC
248368919, , , , GO10005_LC
248368920, , , , GO10005_LC
248368921, , , , GO10005_LC
248368922, , , , GO10018_LC|GO10005_LC|GO10019_LC|GO10048_LC|GO10048_SC
248368923, , , , GO10005_LC
248368924, , , , GO10005_LC
248368925, , , , GO10005_LC
248368926, , , , GO10005_LC
248368927, , , , GO10005_LC
248368928, , , , GO10005_LC
248368929, , , , GO10005_LC
248368930, , , , GO10005_LC
248368931, , , , GO10005_LC
248368932, , , , GO10005_LC
248368933, , , , GO10005_LC
248368934, , , , GO10005_LC
248368935, , , , GO10005_LC