A dataset provided by the European Space Agency

Name GPSURVEY
Title Selected Area Galactic Survey
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=148019090

DOI https://doi.org/10.5270/esa-ugis1fg
Author Price, S
Description 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 4 (5.5-6.5 microns) and lw 7 (8.5-10.7 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 4 and lw 7. parallel mode observations are to be obtained in isocam lw 4 as part of the galactic background radiation phot experiment by mattila et al. and 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 two additional colors. it would be ...desirable to link the isocam images on these fields with the primary photometric experiments. time will also be devoted to 6x6 raster images in specific regions. approximately 60 lw 3 and lw 7 images will be needed to match the lw 4 observations in the parallel mode. the 49 phot positions of interest are b=0, +/-1, +/-5 deg. at l= +/-5, +/-15, +/- 30, +/- 45 and at +/-60 deg. (there is no phot position at b=-1deg., l=-60deg.) the 9 caux positions of interest are l=30 deg., b=0, +/-1, +/-2, +/-3 and +/-5 deg. at each position the tdt is 639 sec for normal observations and 479 sec for concatenated ones. 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 - 9 hours (this part of the proposal is now included in diffuse ir emission of the galaxy, mattila et al. and the diffuse medium in the galactic plane, caux et al.) larger images obtained by 6x6 raster scans in lw 3 and lw 7 with 100 offsets will probe specific areas more extensively. the target dedicated time for each raster is 7170 sec. observing mode - camaot#1 (staring mode) time: 16 hours total time: 25 hours (9+16) (nine hours were shifted to diffuse ir emission of the galaxy, mattila et al and the diffuse medium in the galactic plane, caux et al.)
Instrument CAM01
Temporal Coverage 1996-04-13T09:10:00Z/1996-09-13T04:50:54Z
Version 1.0
Mission Description The Infrared Space Observatory (ISO) was the world's first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
Creator Contact https://support.cosmos.esa.int/iso/
Date Published 1999-04-08T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Price, S, 1999, GPSURVEY, 1.0, European Space Agency, https://doi.org/10.5270/esa-ugis1fg