Integral Field Spectroscopy of 23 Spiral Bulges

We have obtained Integral Field Spectroscopy for 23 spiral bulges usingINTEGRAL on the William Herschel Telescope and SPIRAL on the Anglo-AustralianTelescope. This is the first 2D survey directed solely at the bulges of spiralgalaxies. Eleven galaxies of the sample do not have previous measurements ofthe stellar velocity dispersion (sigma*). These data are designed to complementour Space Telescope Imaging Spectrograph program for estimating black holemasses in the range 10^6-10^8M_sun using gas kinematics from nucleated disks.These observations will serve to derive the stellar dynamical bulge propertiesusing the traditional Mgb and CaII triplets. We use both Cross Correlation andMaximum Penalized Likelihood to determine projected sigma* in these systems andpresent radial velocity fields, major axis rotation curves, curves of growthand sigma* fields. Using the Cross Correlation to extract the low order 2Dstellar dynamics we generally see coherent radial rotation and irregularvelocity dispersion fields suggesting that sigma* is a non-trivial parameter toestimate.Comment: 11 pages, 30 figures, accepted for publication in ApJ