<=== observer ===>
"TONAKA",\
"Onaka, T.",\
"Department of Astronomy",\
"University of Tokyo",\
"2-11-16 Yayoi Bunkyo-ku",\
"",\
"113",\
"Tokyo",\
"Japan",\
"81 3 58006884",\
"81 3 38139439",\
"onaka@astron.s.u-tokyo.ac.jp"
<=== proposal ===>
"WDISM2",3,2,\
{"diffuse interstellar medium", "dust properties",\
"HII regions", "irregular galaxies"},\
{"Y.Doi","M.Kawada","H.Matsuhara","S.Matsuura","K.Mochizuki",\
"H.Murakami","T.Nagata","T.Nakagawa","H.Okuda","H.Shibai","M.Tanaka"}
<=== title ===>
Observation of Diffuse Interstellar Medium II. FIR Polarization Study
<=== abstract ===>
SCIENTIFIC ABSTRACT
There are still a number of problems in the nature of the diffuse interstellar
medium (DISM), which have to be investigated by observations. The questions to
be addressed involve a clear identification of various phases of the DISM,
their volume or mass fractions, their roles and interrelations, the transition
processes from one to another phase, and the properties and size distribution
of dust grains in the DISM. This proposal is the second part of the program to
study the DISM, where the FIR polarization observation is proposed to
investigate the properties of interstellar dust grains.
The emission spectrum from the DISM peaks at the far-infrared region and the
gas and dust behaviors are best studied by the far-infrared observations.
The FIR polarization measurement of the thermal emission from the DISM by
PHOT-C will provide information on various components of dust grains
contributing to the FIR continuum emission.
The polarization in the FIR emission is thought to arise from the emission of
aspherical dust grains. The dependence of the polarization on the wavelength
can be predicted if there is only one dust component contributing to the
observed continuum emission. The IRAS and COBE observations, however,
indicate that there are the emission coming from the classical sub-micron-sized
grains and an additional component in the wavelength range shorter
than 60 micron. The excess emission below 60 micron has been interpreted
in terms of the temperature-fluctuating very small grains (1-10 nm size),
which may have different polarization characteristics from those of
sub-micron-sized grains. The spectrum of polarization can thus provide the
information on the contribution of various components to the FIR emission
together with the properties of each component.
OBSERVATION SUMMARY
The targets of this proposal are coordinated to the first part of the program,
Observation of Diffuse Interstellar Medium I. Spectroscopic Study. The
targets and the observation parameters are summarized in the followings.
W1, 23Tau 4 positions
AOT PHT51 band C_60, C_100, C_135, C_200
32 sec integration time at each polarizer
Carina region 4 positions:
(The same positions as those where SWS01 low-resolution full grating
scan (R/8 mode) is proposed in part I.)
AOT PHT50 band P_25
32 sec integration time
PHT51 band C_60, C_100, C_200
16 sec integration time at each polarizer
HD147889 4 positions
AOT PHT51 band C_60, C_100, C_200
32 sec integration time at each polarizer
<=== scientific_justification ===>
Time distribution for autumn launch targets
Team top 40% second 30% third 30% total time
-----------------------------------------------------
JPN 0 4488 7768 12256
-----------------------------------------------------
Time distribution for spring launch targets
Team top 40% second 30% third 30% total time
-----------------------------------------------------
JPN 0 4488 8656 13144
-----------------------------------------------------
<=== autumn_launch_targets ===>
1, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,483,2
2, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,319,3
3, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,222,4
4, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,218,5
5, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,323,6
6, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,319,7
7, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,222,8
8, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,218,9
9, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,323,10
10, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,319,11
11, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,222,12
12, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,218,13
13, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,323,14
14, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,319,15
15, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,222,16
16, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,218,0
17, "PHT50", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,494, 18
18, "PHT51", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,259, 19
19, "PHT51", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,255, 20
20, "PHT51", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,154, 21
21, "PHT50", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,334, 22
22, "PHT51", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,259, 23
23, "PHT51", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,255, 24
24, "PHT51", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,154, 25
25, "PHT50", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,334, 26
26, "PHT51", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,259, 27
27, "PHT51", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,255, 28
28, "PHT51", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,154, 29
29, "PHT50", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,334, 30
30, "PHT51", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,259, 31
31, "PHT51", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,255, 32
32, "PHT51", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,154, 0
33, "PHT51", 3.0, "N", "HD147889_20", 16.39614, -24.35194, 1950, 0., 0., 483, 34
34, "PHT51", 3.0, "N", "HD147889_20", 16.39614, -24.35194, 1950, 0., 0., 319, 35
35, "PHT51", 3.0, "N", "HD147889_20", 16.39614, -24.35194, 1950, 0., 0., 218, 36
36, "PHT51", 3.0, "N", "HD147889_19", 16.39248, -24.35194, 1950, 0., 0., 323, 37
37, "PHT51", 3.0, "N", "HD147889_19", 16.39248, -24.35194, 1950, 0., 0., 319, 38
38, "PHT51", 3.0, "N", "HD147889_19", 16.39248, -24.35194, 1950, 0., 0., 218, 39
39, "PHT51", 3.0, "N", "HD147889_18", 16.38882, -24.35194, 1950, 0., 0., 323, 40
40, "PHT51", 3.0, "N", "HD147889_18", 16.38882, -24.35194, 1950, 0., 0., 319, 41
41, "PHT51", 3.0, "N", "HD147889_18", 16.38882, -24.35194, 1950, 0., 0., 218, 42
42, "PHT51", 3.0, "N", "HD147889_17", 16.38516, -24.35194, 1950, 0., 0., 323, 43
43, "PHT51", 3.0, "N", "HD147889_17", 16.38516, -24.35194, 1950, 0., 0., 319, 44
44, "PHT51", 3.0, "N", "HD147889_17", 16.38516, -24.35194, 1950, 0., 0., 218, 0
<=== spring_launch_targets ===>
1, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,483,2
2, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,319,3
3, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,222,4
4, "PHT51", 2.0, "N", "W1_P1", 23.94282, 67.06171, 1950, 0.,0.,218,5
5, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,323,6
6, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,319,7
7, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,222,8
8, "PHT51", 2.0, "N", "W1_P2", 23.95117, 67.07173, 1950, 0.,0.,218,9
9, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,323,10
10, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,319,11
11, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,222,12
12, "PHT51", 2.0, "N", "W1_P3", 23.95953, 67.08165, 1950, 0.,0.,218,13
13, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,323,14
14, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,319,15
15, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,222,16
16, "PHT51", 2.0, "N", "W1_P4", 23.96789, 67.09148, 1950, 0.,0.,218,0
17, "PHT50", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,494, 18
18, "PHT51", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,259, 19
19, "PHT51", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,255, 20
20, "PHT51", 3.0, "N", "Car_POL1", 10.67823, -59.26242, 1950, 0., 0.,154, 21
21, "PHT50", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,334, 22
22, "PHT51", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,259, 23
23, "PHT51", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,255, 24
24, "PHT51", 3.0, "N", "Car_POL2", 10.68399, -59.28596, 1950, 0., 0.,154, 25
25, "PHT50", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,334, 26
26, "PHT51", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,259, 27
27, "PHT51", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,255, 28
28, "PHT51", 3.0, "N", "Car_POL3", 10.68975, -59.30945, 1950, 0., 0.,154, 29
29, "PHT50", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,334, 30
30, "PHT51", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,259, 31
31, "PHT51", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,255, 32
32, "PHT51", 3.0, "N", "Car_POL4", 10.69552, -59.33288, 1950, 0., 0.,154, 0
33, "PHT51", 3.0, "N", "23 Tau_9", 3.72022, 23.75096, 1950, 0., 0., 483, 34
34, "PHT51", 3.0, "N", "23 Tau_9", 3.72022, 23.75096, 1950, 0., 0., 319, 35
35, "PHT51", 3.0, "N", "23 Tau_9", 3.72022, 23.75096, 1950, 0., 0., 222, 36
36, "PHT51", 3.0, "N", "23 Tau_9", 3.72022, 23.75096, 1950, 0., 0., 218, 37
37, "PHT51", 3.0, "N", "23 Tau_8", 3.71797, 23.71167, 1950, 0., 0., 323, 38
38, "PHT51", 3.0, "N", "23 Tau_8", 3.71797, 23.71167, 1950, 0., 0., 319, 39
39, "PHT51", 3.0, "N", "23 Tau_8", 3.71797, 23.71167, 1950, 0., 0., 229, 40
40, "PHT51", 3.0, "N", "23 Tau_8", 3.71797, 23.71167, 1950, 0., 0., 218, 41
41, "PHT51", 3.0, "N", "23 Tau_7", 3.71572, 23.67238, 1950, 0., 0., 323, 42
42, "PHT51", 3.0, "N", "23 Tau_7", 3.71572, 23.67238, 1950, 0., 0., 319, 43
43, "PHT51", 3.0, "N", "23 Tau_7", 3.71572, 23.67238, 1950, 0., 0., 222, 44
44, "PHT51", 3.0, "N", "23 Tau_7", 3.71572, 23.67238, 1950, 0., 0., 218, 45
45, "PHT51", 3.0, "N", "23 Tau_6", 3.71347, 23.63308, 1950, 0., 0., 323, 46
46, "PHT51", 3.0, "N", "23 Tau_6", 3.71347, 23.63308, 1950, 0., 0., 319, 47
47, "PHT51", 3.0, "N", "23 Tau_6", 3.71347, 23.63308, 1950, 0., 0., 228, 48
48, "PHT51", 3.0, "N", "23 Tau_6", 3.71347, 23.63308, 1950, 0., 0., 218, 0