<=== observer ===>
"EBECKLIN",\
"Becklin, E.E.",\
"Department of Astronomy",\
"University of California at Los Angeles",\
"405 Hilgard Avenue",\
"",\
"90024",\
"Los Angeles",\
"U.S.A.",\
"1 310 2060208",\
"1 310 2062096",\
"becklin@bonnie.astro.ucla.edu"
<=== proposal ===>
"DEBRIS03",2,3,\
{"circumstellar discs"},\
{"Zuckerman, B.","Sargent, A.I.","Jura, M.","Goldreich, P."}
<=== title ===>
Dust Debris Around Solar Mass Stars
<=== abstract ===>
SCIENTIFIC ABSTRACT
With ISO, we propose to study the physical nature and evolutionary history
of dust debris clouds around solar mass stars. These clouds, discovered by
IRAS, are thought to be related to planetary systems. The program will consist
of: (i) A photometric study of selected A, F, G, and K-type main sequence
stars within 20 pc of the Sun. 100 stars have been selected with various
ages and multiplicity. (ii) A study of the evolutionary history of debris
clouds from observations of ~140 young open cluster stars and weak-line
T Tauri stars. (iii) Search for excess emission from ~20 known young main
sequence field stars beyond 20 pc. (iv) Search for possible dust disks around
degenerate stars. The investigation will clarify the relationship of the
debris clouds, specific properties of stars, and place the phenomenon in the
context of planetary formation.
OBSERVATION SUMMARY
We will investigate the excess emission from main sequence stars at 60
micron and 100 micron using C100 and P3 in ISOPHOT. For the cluster stars
we will use a sparse map and C100 (PHT37, PHT38, and PHT39). Each observation
consists of a single stare on the object and then a corresponding stare on
an adjacent sky, separated by 2 arcmin. For stability of the detectors,
all observations in a sequence will be done at one wavelength and then a
repeated reverse sequence at a second wavelength; The two sequences are
concatenated together. Integration times on each of the source and sky will be
160 sec at 60 micron and 96 sec at 100 micron. The required signal to noise
for these cluster stars is unknown, since the photosphere will not be seen
and the amount of excess depends on the unknown dust density.
For measurements of field stars and isolated cluster stars, either the
photometer P3 or array C100 will be used, depending on the cirrus noise.
If cirrus > 15 MJy/sr at 100 micron, C100 is used. In both cases a triangular
wave chopping will be used. The peak to peak motion of the chopper throw will
be 270 arcsec with the object in the center (the object will thus be 135
arcsec from each extreme position). Integration times on source will typically
be 192 sec at 60 micron and 64 sec at 100 micron. The 99 arcsec aperture
will be used for the P3 observations. We expect that the photosphere will be
detected for most stars stars with a S/N > 5.
Acquisition 180 sec
Initial instrument setup 15 sec
Stability of detector 90 sec
Filter change (2 Pos) 20 sec
FCS exposures (for 2 filters) 32 sec
Integration at 60 micron 384 sec
Integration at 100 micron 128 sec
Total time 849 sec
<=== scientific_justification ===>
Time distribution for autumn launch targets:
Team top 40% second 30% third 30%
USA : 17829 11005 19527
total : 17829 11005 19527
Time distribution for spring launch targets:
Team top 40% second 30% third 30%
USA : 16980 10156 13584
total : 16980 10156 13584
<=== autumn_launch_targets ===>
01,"PHT03",1.0,"N","G_Gl 0017.3 ",00.33833,-12.48667,1950,+0.391,+0.065,849,0
02,"PHT03",1.0,"N","G_Gl 0067 ",01.64556,+42.36333,1950,+0.812,-0.149,849,0
03,"PHT03",1.0,"N","G_Gl 0113.1 ",02.76167,+30.91000,1950,+0.214,-0.170,849,0
04,"PHT03",1.0,"N","G_Gl 0139 ",03.29889,-43.26000,1950,+3.038,+0.741,849,0
05,"PHT03",1.0,"N","G_Gl 0423A ",11.25861,+31.81000,1950,-0.429,-0.587,849,0
06,"PHT03",1.0,"N","G_Gl 0475 ",12.52278,+41.62833,1950,-0.707,+0.289,849,0
07,"PHT03",1.0,"N","G_Gl 0501.2 ",13.15417,-37.53833,1950,-0.388,+0.043,849,0
08,"PHT03",1.0,"N","G_Gl 0547 ",14.34500,+01.47500,1950,+0.222,-0.479,849,0
09,"PHT03",1.0,"N","G_Gl 0564 ",14.80056,+24.11667,1950,+0.143,+0.030,849,0
10,"PHT03",1.0,"N","G_Gl 0566A ",14.81806,+19.30667,1950,+0.136,-0.103,849,0
11,"PHT03",1.0,"N","G_Gl 0584A ",15.35222,+30.46667,1950,+0.140,-0.193,849,0
12,"PHT03",1.0,"N","G_Gl 0598 ",15.73361,+07.50833,1950,-0.228,-0.079,849,0
13,"PHT03",1.0,"N","G_Gl 0641 ",16.84083,+00.07500,1950,-0.722,-1.493,849,0
14,"PHT03",1.0,"N","G_Gl 0651 ",17.02000,+47.14000,1950,+0.120,+0.866,849,0
15,"PHT03",1.0,"N","G_Gl 0679 ",17.50361,+34.30500,1950,-0.248,+0.065,849,0
16,"PHT03",1.0,"N","G_Gl 0684A ",17.57444,+61.91333,1950,+0.248,-0.511,849,0
17,"PHT03",1.0,"N","G_Gl 0836.7 ",21.70194,+14.54333,1950,+0.234,-0.116,849,0
18,"PHT03",1.0,"N","G_NN 0319 ",22.13222,+19.37167,1950,+0.089,-0.092,849,0
19,"PHT03",1.0,"N","G_Gl 0859A ",22.39778,-16.99667,1950,+0.222,+0.000,849,0
20,"PHT03",1.0,"N","G_Gl 0882 ",22.91667,+20.50000,1950,+0.203,+0.047,849,0
21,"PHT03",1.0,"N","G_Gl 0894.2A ",23.24139,-13.73167,1950,+0.296,-0.099,849,0
22,"PHT03",2.0,"N","G_Gl 0025A ",00.57972,-25.04167,1950,+1.394,-0.007,849,0
23,"PHT03",2.0,"N","G_GJ 1020 ",00.71611,-13.15167,1950,-0.038,-0.198,849,0
24,"PHT03",3.0,"N","G_Gl 0616 ",16.21500,-08.23833,1950,+0.229,-0.505,849,0
25,"PHT03",2.0,"N","G_Gl 0446 ",11.74583,-30.00500,1950,-0.268,-0.230,849,0
26,"PHT03",2.0,"N","G_Gl 0486.1 ",12.77250,+25.11333,1950,-0.340,-0.111,849,0
27,"PHT03",2.0,"N","G_Gl 0512.1 ",13.43306,+14.04500,1950,-0.238,-0.581,849,0
28,"PHT03",2.0,"N","G_Gl 0596.1A ",15.69194,+02.67333,1950,-0.057,-0.153,849,0
29,"PHT03",2.0,"N","G_Gl 0606.2 ",15.98556,+33.45333,1950,-0.204,-0.772,849,0
30,"PHT03",2.0,"N","G_Gl 0624 ",16.38444,-69.97500,1950,+0.207,+0.103,849,0
31,"PHT03",2.0,"N","G_Gl 0776 ",20.00944,-67.45333,1950,+0.831,-0.692,849,32
32,"PHT03",2.0,"N","G_Gl 0780 ",20.06389,-66.31167,1950,+1.204,-1.143,817,0
33,"PHT03",2.0,"N","G_Gl 0853A ",22.25000,-53.86833,1950,+0.436,-0.644,849,0
34,"PHT03",2.0,"N","G_NN 0324 ",23.50222,-77.66167,1950,+0.017,+0.005,849,0
35,"PHT03",3.0,"N","G_Gl 0013 ",00.24000,-52.93167,1950,+0.316,+0.175,849,0
36,"PHT03",3.0,"N","G_Gl 0023B ",00.54444,-03.86833,1950,+0.410,-0.021,849,0
37,"PHT22",3.0,"N","G_Gl 0034A ",00.76750,+57.55167,1950,+1.100,-0.511,849,0
38,"PHT03",3.0,"N","G_Gl 0067.1 ",01.65250,-83.23000,1950,+0.125,+0.129,849,0
39,"PHT03",3.0,"N","G_Gl 0132 ",03.22333,-45.84500,1950,-0.154,+0.143,849,0
40,"PHT03",3.0,"N","G_Wo 9189 ",05.68556,-80.50833,1950,+0.320,+1.052,849,0
41,"PHT03",3.0,"N","G_Gl 0290 ",07.80194,+80.39500,1950,-0.483,+0.078,849,0
42,"PHT03",2.0,"N","G_Gl 0451A ",11.83500,+38.07833,1950,+4.005,-5.806,849,0
43,"PHT03",3.0,"N","G_Gl 0484 ",12.71056,+39.55000,1950,-0.364,+0.144,849,0
44,"PHT03",3.0,"N","G_Gl 0534 ",13.87167,+18.64833,1950,-0.064,-0.363,849,0
45,"PHT03",3.0,"N","G_Gl 0538 ",14.01806,+11.03000,1950,+0.090,-0.309,849,0
46,"PHT03",3.0,"N","G_Gl 0541.1 ",14.25583,-07.30833,1950,+0.265,-0.230,849,0
47,"PHT03",3.0,"N","G_NN 0280 ",14.46083,+42.02000,1950,+0.156,-0.223,849,0
48,"PHT22",3.0,"N","G_Gl 0570.1 ",14.91167,-48.65833,1950,-0.009,-0.336,849,0
49,"PHT03",3.0,"N","G_Gl 0611A ",16.05361,+39.29000,1950,-0.577,+0.050,849,0
50,"PHT03",3.0,"N","G_Gl 0635A ",16.65667,+31.69167,1950,-0.471,+0.394,849,0
51,"PHT03",3.0,"N","G_Gl 0754.2 ",19.29806,+37.24000,1950,-0.047,-0.162,849,0
52,"PHT03",3.0,"N","G_Gl 0695A ",17.74167,+27.74833,1950,-0.317,-0.750,849,0
53,"PHT03",3.0,"N","G_Gl 0771A ",19.88083,+06.28000,1950,+0.044,-0.479,849,0
54,"PHT22",3.0,"N","G_Gl 0779 ",20.03083,+16.93333,1950,-0.399,-0.409,849,0
55,"PHT03",3.0,"N","G_Gl 0848.4 ",22.11444,-07.78833,1950,+0.083,-0.447,849,0
56,"PHT03",3.0,"N","G_Gl 0851.3 ",22.19889,-16.06167,1950,-0.004,-0.354,849,0
57,"PHT03",3.0,"N","G_NN 0323 ",23.18167,-70.33167,1950,+0.186,+0.074,849,0
<=== spring_launch_targets ===>
01,"PHT03",1.0,"N","G_Gl 0017.3 ",00.33833,-12.48667,1950,+0.391,+0.065,849,0
02,"PHT03",1.0,"N","G_Gl 0067 ",01.64556,+42.36333,1950,+0.812,-0.149,849,0
03,"PHT03",1.0,"N","G_Gl 0113.1 ",02.76167,+30.91000,1950,+0.214,-0.170,849,0
04,"PHT03",1.0,"N","G_Gl 0139 ",03.29889,-43.26000,1950,+3.038,+0.741,849,0
05,"PHT03",1.0,"N","G_Gl 0160 ",04.03944,+21.87500,1950,+0.173,-0.140,849,0
06,"PHT03",1.0,"N","G_Gl 0252 ",06.87056,+25.44000,1950,-0.042,+0.026,849,0
07,"PHT03",1.0,"N","G_Gl 0262 ",07.00556,+29.42333,1950,+0.159,-0.826,849,0
08,"PHT03",1.0,"N","G_Gl 0307.1 ",08.40222,+45.82333,1950,-0.015,-0.353,849,0
09,"PHT03",1.0,"N","G_Gl 0311 ",08.57972,+65.19500,1950,-0.024,+0.086,849,0
10,"PHT03",1.0,"N","G_Gl 0314A ",08.61583,-22.49000,1950,-0.239,+0.432,849,0
11,"PHT03",1.0,"N","G_Gl 0344A ",09.42167,-05.85167,1950,-0.227,-0.078,849,0
12,"PHT03",1.0,"N","G_Gl 0356A ",09.54444,+36.03667,1950,-0.735,-0.247,849,0
13,"PHT03",1.0,"N","G_Gl 0376 ",09.96889,+32.17000,1950,-0.528,-0.435,849,0
14,"PHT03",1.0,"N","G_Gl 0423A ",11.25861,+31.81000,1950,-0.429,-0.587,849,0
15,"PHT03",1.0,"N","G_Gl 0475 ",12.52278,+41.62833,1950,-0.707,+0.289,849,0
16,"PHT03",1.0,"N","G_Gl 0836.7 ",21.70194,+14.54333,1950,+0.234,-0.116,849,0
17,"PHT03",1.0,"N","G_NN 0319 ",22.13222,+19.37167,1950,+0.089,-0.092,849,0
18,"PHT03",1.0,"N","G_Gl 0859A ",22.39778,-16.99667,1950,+0.222,+0.000,849,0
19,"PHT03",1.0,"N","G_Gl 0882 ",22.91667,+20.50000,1950,+0.203,+0.047,849,0
20,"PHT03",1.0,"N","G_Gl 0894.2A ",23.24139,-13.73167,1950,+0.296,-0.099,849,0
21,"PHT03",2.0,"N","G_Gl 0025A ",00.57972,-25.04167,1950,+1.394,-0.007,849,0
22,"PHT03",2.0,"N","G_GJ 1020 ",00.71611,-13.15167,1950,-0.038,-0.198,849,0
23,"PHT03",3.0,"N","G_NN 0231 ",04.71556,+42.25833,1950,+0.000,+0.065,849,0
24,"PHT22",2.0,"N","G_Gl 0222AB ",05.85694,+20.26833,1950,-0.189,-0.092,849,0
25,"PHT22",2.0,"N","G_Gl 0230 ",06.17389,+10.64500,1950,+0.082,-0.291,849,0
26,"PHT03",2.0,"N","G_NN 0242 ",06.19472,-23.84833,1950,-0.051,+0.114,849,0
27,"PHT03",2.0,"N","G_Gl 0324A ",08.82694,+28.52333,1950,-0.474,-0.232,849,0
28,"PHT03",2.0,"N","G_Gl 0446 ",11.74583,-30.00500,1950,-0.268,-0.230,849,0
29,"PHT03",2.0,"N","G_Gl 0776 ",20.00944,-67.45333,1950,+0.831,-0.692,849,30
30,"PHT03",2.0,"N","G_Gl 0780 ",20.06389,-66.31167,1950,+1.204,-1.143,817,0
31,"PHT03",2.0,"N","G_Gl 0853A ",22.25000,-53.86833,1950,+0.436,-0.644,849,0
32,"PHT03",2.0,"N","G_NN 0324 ",23.50222,-77.66167,1950,+0.017,+0.005,849,0
33,"PHT03",3.0,"N","G_Gl 0013 ",00.24000,-52.93167,1950,+0.316,+0.175,849,0
34,"PHT03",3.0,"N","G_Gl 0023B ",00.54444,-03.86833,1950,+0.410,-0.021,849,0
35,"PHT22",3.0,"N","G_Gl 0034A ",00.76750,+57.55167,1950,+1.100,-0.511,849,0
36,"PHT03",3.0,"N","G_Gl 0067.1 ",01.65250,-83.23000,1950,+0.125,+0.129,849,0
37,"PHT03",3.0,"N","G_Gl 0132 ",03.22333,-45.84500,1950,-0.154,+0.143,849,0
38,"PHT03",3.0,"N","G_Wo 9189 ",05.68556,-80.50833,1950,+0.320,+1.052,849,0
39,"PHT03",3.0,"N","G_Gl 0295 ",07.95750,+29.36667,1950,-0.160,-1.170,849,0
40,"PHT03",3.0,"N","G_Gl 0754.2 ",19.29806,+37.24000,1950,-0.047,-0.162,849,0
41,"PHT03",3.0,"N","G_GJ 1095 ",07.20222,+47.33167,1950,+0.031,-0.185,849,0
42,"PHT03",3.0,"N","G_Gl 0290 ",07.80194,+80.39500,1950,-0.483,+0.078,849,0
43,"PHT03",2.0,"N","G_Gl 0451A ",11.83500,+38.07833,1950,+4.005,-5.806,849,0
44,"PHT03",3.0,"N","G_Gl 0484 ",12.71056,+39.55000,1950,-0.364,+0.144,849,0
45,"PHT22",3.0,"N","G_Gl 0779 ",20.03083,+16.93333,1950,-0.399,-0.409,849,0
46,"PHT03",3.0,"N","G_Gl 0848.4 ",22.11444,-07.78833,1950,+0.083,-0.447,849,0
47,"PHT03",3.0,"N","G_Gl 0851.3 ",22.19889,-16.06167,1950,-0.004,-0.354,849,0
48,"PHT03",3.0,"N","G_NN 0323 ",23.18167,-70.33167,1950,+0.186,+0.074,849,0