<=== observer ===>
"DROUAN",\
"Rouan, D.",\
"DESPA",\
"Observatoire de Paris-Meudon",\
"Place J. Janssen",\
"",\
"92195 ",\
"Meudon Cedex",\
"France",\
"33 1 45077715",\
"33 1 45072806",\
"rouan@megasx.obspm.circe.fr"
<=== proposal ===>
"POLARISM",1,2,\
{"diffuse interstellar medium","dust properties","bipolar outflows"},\
{"Minard F.","Boulanger F.","Lequeux J.","Vigroux L.","Lacombe F."}
<=== title ===>
Polaro-Imaging of different components of the Interstellar Medium and
circumstellar dust
<=== abstract ===>
SCIENTIFIC ABSTRACT
The polarization in the infrared can be due either to scattering of the
light from a source, or from dichroic absorption or emission by aligned
grains. The effects on the polarization vector of each of those mechanism are
strongly wavelength, size and material dependant: combining the information
at many different wavelengths and in several spectral lines of the intensity
and distribution of the linear polarization vector provides a powerful
information, partly independant from spectro-photometry, on the composition,
size and shape of the grains in the interstellar or circumstellar medium. The
polarimetric capability of ISOCAM offers a unique opportunity to put severe
constraints on the grain component and to probe the magnetic field intensity
and direction in various phases and radiation environments of the Interstellar
and Circumstellar Medium: Galactic Center, Bipolar outflows (L1551-IRS5, R
Mon, Cep A ), reflection nebula and HI/HII interfaces (NGC 2023, NGC7023,
M17), star forming complex (Mon R2, S140), circumstellar envelopes (HD44179,
OH231.8+4.2, Frosty Leo, CRL2688).
OBSERVATION SUMMARY
The CAM routine for Polarization Observation will be used. The polarization
measurements require a S/N ratio of the order of 70. The proposed program
consists in covering the entire spectral range of CAM with the broad-band
filters: SW1, SW3, LW1, LW4, LW6, LW7, LW8 and LW9. The PFOV 1.5, 3 and 6
arc-sec are used, depending on the object.
- Galactic Center: the sources are bright (15 to 120 Jy for IRS 1 to IRS 10
at 13 microns) and require the smallest elementary integration time with
coaddition. The cluster of sources around IRS16 lies within 30 arc-sec
typically, allowing the choice of the 1.5 arc-sec PFOV.
- The Bipolar outflows L1551-IRS5, R Mon and Cep A: bright central sources,
requiring an elementary integration time of 1 to 2 sec. The PFOV 3 arc-sec is
well adapted to the extension of the region.
- The Reflection nebulae NGC 2023, NGC 7023 and the HI/HII interface M17:
the extended part of the sources are of moderate brightness (typically 30 mJy
per 6 arc-sec pixel at 10 microns), and requires a long integration. A PFOV
of 6 arc-sec is selected.
- The star forming complex Mon R2 and S140: several bright structures
(typically 30 and 150 Jy at respectively 5 and 10 mu) requires short
integration times on the whole spectral range. The extension of the region is
1 arc-min, and is well covered with the 3 arc-sec PFOV.
- The circumstellar bipolar envelopes HD44179, OH231.8+4.2, CRL 2688 and
Frosty Leo: bright and centrally peaked objects, requiring the 1.5 arc-sec
PFOV, and small elementary integration time (.28 to 2 sec) in co-added mode.
<=== scientific_justification ===>
Team : top 40% second 30% last 30%
CAM : 28800 0 14400
<=== autumn_launch_targets ===>
1, "CAM05", 1.0,"N","Galactic Center",17.70825, -28.98806, 1950, 0., 0.,3600, 0
2, "CAM05", 1.0,"N","NGC 7023", 20.75694, +67.77889, 1950, 0., 0., 16200, 0
3, "CAM05", 1.0,"N","S140", 22.29478, +63.06222, 1950, 0., 0., 5400, 0
4, "CAM05", 1.0,"N","Frosty Leo", 09.62000, +12.20861, 1950, 0., 0., 3600, 0
5, "CAM05", 3.0,"N","M17 ", 18.29222, -16.22917, 1950, 0., 0., 5400, 0
6, "CAM05", 3.0,"N","Cep A", 22.90250, +61.75194, 1950, 0., 0., 3600, 0
7, "CAM05", 3.0,"N","CRL 2688", 21.00556, +36.49528, 1950, 0., 0., 5400, 0
<=== spring_launch_targets ===>
1, "CAM05", 1.0, "N", "NGC 2023", 05.65195, -02.28222, 1950, 0., 0., 16200, 0
2, "CAM05", 1.0, "N", "L1551-IRS5", 04.47769, +18.03110, 1950, 0., 0., 5400, 0
3, "CAM05", 1.0, "N", "Mon R2", 06.08861, -06.37139, 1950, 0., 0., 3600, 0
4, "CAM05", 1.0, "N", "HD 44179", 06.29353, -10.61167, 1950, 0., 0., 3600, 0
5, "CAM05", 3.0, "N", "R Mon", 06.60417, +08.78139, 1950, 0., 0., 3600, 0
6, "CAM05", 3.0, "N", "S140", 22.29478, +63.06222, 1950, 0., 0., 5400, 0
7, "CAM05", 3.0, "N", "OH 231.8+4.2",07.66636, -14.59556, 1950, 0., 0., 5400, 0