<=== observer ===> "DCESARSK",\ "Cesarsky, D.",\ "",\ "Institut d'Astrophysique Spatiale",\ "Batiment 120, Universite de Paris-Sud",\ "",\ "91405",\ "Orsay CEDEX",\ "France",\ "33 169858680",\ "33 169858501",\ "station@iscam1.ias.fr" <=== proposal ===> "HII",\ 1,\ 2,\ {"dust properties","HII regions"},\ {"A.Abergel","J.Lequeux","E.Palazzi","M.Perault"} <=== title ===> Spectral imaging of HII region interfaces and reflection nebulae <=== abstract ===> SCIENTIFIC ABSTRACT: The aim of this proposal is to secure spectral imaging of a few classical Galactic targets with the ISOCAM CVF over the full accessible LW range. While such observations are in principle possible by other means (ground and KAO) at least for the HII region interfaces, we have no guaranty that they will ever be made, and ISO will allow to obtain homogeneous, good-quality data with a complete wavelength coverage. The purposes of these observations will be to study the distribution and properties of normal dust (through extinction determined from recombination lines), hot dust (through continuum emission), and of the carrier(s) of the IR emission bands at the interfaces between HII regions and neutral clouds, and in reflection nebulae that are illuminated by a fainter and softer radiation field. Combined with submillimeter and millimeter observations they will yield a complete picture of these objects including thermal balance. OBSERVATION SUMMARY: Imaging of selected galactic extended objects will be made with complete CVF scans in the long-wavelength channel of ISOCAM (the full 2x85 steps). The pixel size will be 6" and the elementary integration time 2 seconds. The average S/N ratio will be 17 in the wavelength range 5.07 to 9.43 micrometers and 12 from 9.03 to 16.6 micrometers for a brightness of 1 millijansky/square arc second and the minimum total observing time of nearly 1 hour. This is very roughly the brightness expected for the selected reflection nebulae while the brightness is higher for the selected HII regions. <=== scientific_justification ===> For both autumn and spring launch targets: team top 40% second 30% last 30% CAM: 0 10800 7200 SOT: 0 0 3600 Total: 0 10800 10800 <=== autumn_launch_targets ===> 1, "CAM04", 2.0, "N", "M 17", 18.29222, -16.22917, 1950, 0., 0., 3600, 0 2, "CAM04", 2.0, "N", "NGC 7023", 21.01667, 67.98333, 1950, 0., 0., 3600, 0 3, "CAM04", 2.0, "N", "S 140", 22.29472, 63.06250, 1950, 0., 0., 3600, 0 4, "CAM04", 3.0, "N", "W 3", 2.37367, 61.87250, 1950, 0., 0., 3600, 0 5, "CAM04", 3.0, "N", "CRL 2136", 18.37403, -13.33667, 2000, 0., 0., 3600, 0 6, "CAM04", 3.0, "N", "NGC 7538", 23.19353, 61.19167, 1950, 0., 0., 3600, 0 <=== spring_launch_targets ===> 1, "CAM04", 2.0, "N", "Orion bar", 5.54783, -05.45000, 1950, 0., 0., 3600, 0 2, "CAM04", 2.0, "N", "NGC 2023", 5.65208, -02.28333, 1950, 0., 0., 3600, 0 3, "CAM04", 2.0, "N", "S 140", 22.29472, 63.06250, 1950, 0., 0., 3600, 0 4, "CAM04", 3.0, "N", "W 3", 2.37367, 61.87250, 1950, 0., 0., 3600, 0 5, "CAM04", 3.0, "N", "Orion KL", 5.54639, -5.40278, 1950, 0., 0., 3600, 0 6, "CAM04", 3.0, "N", "NGC 7023", 21.01667, 67.98333, 1950, 0., 0., 3600, 0