<=== observer ===> "SPRICE",\ "Price, S",\ "Backgrounds Branch",\ "Phillips Laboratory",\ "29 Randolph Rd.",\ "",\ "PL/GPOB",\ "Hanscom AFB, MA 01731-3010",\ "USA",\ "1 617 3774552",\ "1 617 3778780",\ "price@plh.af.mil" <=== proposal ===> "GPSURVEY", 1, 3,\ {"galactic structure"},\ {"T. de Graauw",\ "C. Cesarsky",\ "M. Perault",\ "P. Gallais",\ "E. Palazzi",\ "M. Burgdorf"} <=== title ===> Selected Area Galactic Survey <=== abstract ===> SCIENTIFIC ABSTRACT ISOCAM images to low flux levels will be obtained along the Galactic Plane to determine the large scale properties of the Galaxy. The discrete near- and mid-infrared components of the Galaxy are derived by enumerating and classifying sources extracted from the images. These data are used to define/refine our knowledge of galactic structure, the mid-infrared luminosity function and the associated density and distribution parameters for the constituents of the inner Galaxy. We adopt the latest version of the physical model originated by Wainscoat et al. for Galactic structure in order to obviate the aliasing introduced by the sparse sampling scheme and as a guide for deconvolving the source counts into constituents. To do more than validate this model requires images in at least two spectral bands and a measure of the source density gradients. Three color observations with the long wavelength camera can be used to classify sources by their location in the color-color diagram. In order of priority, the desired bands are LW 3 (12- >17 microns), LW 2 (5-8.5 microns) and LW 1 (4-5 microns). These observations and the subsequent improvement in modeling the point source sky provide essential information for ISO photometry on the diffuse zodiacal, Galactic and extra-galactic backgrounds by accurately accounting for the contribution of the foreground stars. OBSERVATION SUMMARY ISOCAM Images are to be obtained in Bands LW 3, LW 2 and LW 1. Parallel mode observations are to be obtained in ISOCAM LW 2 as part of the "Galactic Background Radiation" PHOT experiment by Mattila et al. or the LWS proposal by Caux, "Diffuse Medium/Galactic Plane". The PHOT proposal requests a number of positions at various longitudes along the Galactic plane while the LWS proposal specifies additional fields. A field would be revisited during the dedicated time to obtain images in at least one additional color. It would be desirable to link the ISOCAM images on these fields with the primary photometric experiments. Time will also be devoted to 4x4 raster images in specific regions. Approximately 40 LW 3 images will be needed to match the LW 2 observations in the parallel mode. The 30 PHOT positions of interest currently are b=0, +/-1, +/-5 deg. at l= +/-5, +/-15, +/- 30 deg. and b=0 deg. at +/-45 deg. The 9 Caux positions of interest are l=300 deg., b=0, +/-1, +/-2, +/-3 and +/-5 deg. Each image takes about 9 minutes, 400 seconds for the multiple images and 30% overhead. Observation mode - CAMAOT#1 (staring mode) Positions - Same fields as the parallel mode. Exact positions require knowledge of where CAM was pointing when parallel observations were obtained. Time - 6 hours (this part of the proposal is now included in "Diffuse IR Emission of the Galaxy", Mattila et al.) Larger images obtained by 4x4 raster scans in LW 2 and LW 3 with 100" offsets will probe specific areas more extensively. Only half the time (5 minutes) per image is required due to the overlap in the raster. Observing mode - CAMAOT#1 (staring mode) Time: 22 hours Total time: 28 hours (6+22) (six hours were shifted to "Diffuse IR Emission of the Galaxy", Mattila et al) <=== scientific_justification ===> Time distribution for autumn launch targets TEAM : top 40 % second 30 % last 30 % SWS : 36000 CAM : 7980 10020 SOT : 26160 total : 70140 10020 <=== autumn_launch_targets ===> 1, "CAM01", 2.0, "N", "SDP 4 0.0 ",17.91417, -25.50250, 2000, 0., 0., 10020, 0 2, "CAM01", 2.0, "N", "SDP 15 0.0 ",18.29778, -15.90333, 2000, 0., 0., 10020, 0 3, "CAM01", 2.0, "N", "SDP 29 0.0 ",18.73750, -3.49889, 2000, 0., 0., 10020, 0 4, "CAM01", 2.0, "N", "SDP 330 0.0",16.07444, -52.42028, 2000, 0., 0., 10020, 0 5, "CAM01", 2.0, "N", "SDP 346 0.0",17.12361, -40.55472, 2000, 0., 0., 10020, 0 6, "CAM01", 2.0, "N", "SDP 356 0.0",17.59611, -32.32778, 2000, 0., 0., 10020, 0 7, "CAM01", 2.0, "N", "SDP 0 +2.8 ",17.58083, -27.45056, 2000, 0., 0., 10020, 0 8, "CAM01", 3.0, "N", "SDP 0 -2.8 ",17.94500, -30.36667, 2000, 0., 0., 10020, 0 <=== spring_launch_targets ===>