----- Attempting Submission 1 (Tue Sep 18 21:32:19 GMT 2007) -----
Phase II Proposal 11352 (OB07349.apt) successfully submitted.
----- Attempting Submission 2 (Wed Sep 19 19:06:09 GMT 2007) -----
----- Attempting Submission 3 (Thu Sep 20 22:22:32 GMT 2007) -----
Assigned ID: 2025
----- Attempting Submission 1 (Sun Sep 09 18:57:07 GMT 2007) -----
Phase I Proposal 2025 (OB07349.apt) successfully submitted.
Mass and distance of the sub-Saturn microlensing planet OGLE-2007-BLG-349LbOGLE-2007-BLG-349Lb is the seventh planet discovered using gravitational microlensing, with planet/star mass ratio 2.8e-4. These microlensing planets lie in the cold, outer reaches of their solar systems and are difficult to detect by other techniques because of their long periods. However, microlensing detections by themselves generally give only the planet/star mass ratio, not the absolute planet mass. HST observations have yielded host star masses and distances for two previous microlensing planets. Here, we propose to apply a proven technique to measure the mass and distance of the newest microlensing planet, which was discovered only two weeks ago. We will use WFPC2 observations to unambiguously determine whether the blended light seen during the event is due to the host star (rather than a random interloper) and a combination of WFPC2 and NICMOS observations to obtain photometric estimates of the mass and distance. Two epochs of observations are required, one at high magnification (in the very near future) and the other at baseline (but not too late -- to avoid having the lens move substantially away from the source).We will use WFPC2 to image the field in I (F814W) at the first epoch and both V (F555W) and I (F814W) at the second epoch, with the object placed in the PC chip. At the two epochs, the source will be I_{Oct10} = 18.8 and (V, I)_{Jun1} = (21.8, 19.9). Using the exposure time calculator, we find that a 5.3 min set of exposures (maximum for the visibility) yields S/N=143, which given the expected magnification lever arm (A = 3.5), is adequate. For the second epoch, we need 4 dithers to measure the PSF elongation in I, and longer exposures for photometry in both bands because the source is fainter. Hence we require two orbits, with (4 × 5.3) min in I and (4 × 5.3) min in V . We will use NICMOS/NIC2 to image the field in H (F160W). The source will be H_{Oct10} = 16.6 and H_{Jun1} = 17.8. The 6.1 minutes total exposure (given the visibility) during the first epoch will yield S/N=372, which is more than adequate. A full orbit during the second epoch will yield a S/N that is slightly bigger (S/N = 381).
Total request is 5 orbits: one WFPC F814W during 9/Oct - 11/Oct, 2007, one NICMOS/NIC2 F160W during 7/Oct - 13/Oct, plus two WFPC (one F814W + one F555W) between 4/May and 4/June, 2008 and one NICMOS/NIC2 F160W between 13/May and 4/June, 2008.The microlensing planet was only discovered on 4 Sept 2007. The principal scientific goal of this proposal is the unambiguous identification of the blended light in the microlensing event as the lens (i.e., the planet's host star) in order to determine its mass and distance (and so the mass and physical projected separation of the planet). Identification of the blended light as the lens requires an observation after about 9 months, when the event has returned to baseline but the lens has not yet moved too far, in order to measure the "PSF distortion" of the blend+source. Measurement of the blend color and magnitude requires two measurements, one near baseline and another when the event is substantially magnified. The event will only remain substantially magnified for about a month. Hence both sets of observations require DDT.COOL STARS0false0.0falsefalsefalsefalsefalsefalseSUPPORTEDSTAREXTRA-SOLAR PLANETG V-IVGRAVITATIONAL LENSSpectral Type: G3V, E(B-V) =1, 1st Epoch: I = 18.8 +/- 0.1, H = 16.6+/-0.2, F(1600) = 2.7 +/- 0.5 E-17, 2nd Epoch: V = 21.8 +/- 0.5, I = 19.9 +/- 0.2, H = 17.8 +/- 0.3, F(1600) = 9 +/- 3 E-18J200018 05 24.4300-26 25 19.00J2000trueWFPC2ImagingNoF555WtrueNIC2ImagingNoNoF160WtrueWFPC2ImagingNoF555WtrueWFPC2ImagingNoF814WtrueNIC2ImagingNoNoF160WPOS-TARGDITHER0.559017LINE0.559017falsefalse143.130096426.56505WFPC2-BOX3falsePOS-TARGDITHER0.49322LINE0.4899falsefalse90490BOX5falsetrue/tmp/OPVisit24238.xml
(Tic-Visit
:proposal-id 11352
:visit-id "01"
:proposal-version -1
:trans-version "20070709"
:date "20-Sep-2007 17:51:45.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "26"
:si-bright-earth-limb-angle 20.0
:data-volume 89632
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 11352
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 11352
:visit-id "01"
:orbit-number 1
:pcs-time 355
:si-vis-utilization 540
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3149
:pcs-gap 0
)
true10true/home/galaxy/dong/OP-cache/proposal11352-v01.xmltrue/tmp/OPVisit24239.xml
(Tic-Visit
:proposal-id 11352
:visit-id "02"
:proposal-version -1
:trans-version "20070709"
:date "20-Sep-2007 17:54:29.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "23"
:si-bright-earth-limb-angle 20.0
:data-volume 114848
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 11352
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 11352
:visit-id "02"
:orbit-number 1
:pcs-time 355
:si-vis-utilization 530
:al-overhead-at-end 0
:internal-dur-at-end 103
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3149
:pcs-gap 0
)
true10true/home/galaxy/dong/OP-cache/proposal11352-v02.xmltrue/tmp/OPVisit24240.xml
(Tic-Visit
:proposal-id 11352
:visit-id "03"
:proposal-version -1
:trans-version "20070709"
:date "20-Sep-2007 17:54:42.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "26"
:si-bright-earth-limb-angle 20.0
:data-volume 358528
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 11352
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 11352
:visit-id "03"
:orbit-number 1
:pcs-time 355
:si-vis-utilization 2520
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3149
:pcs-gap 0
)
true10true/home/galaxy/dong/OP-cache/proposal11352-v03.xmltrue/tmp/OPVisit24241.xml
(Tic-Visit
:proposal-id 11352
:visit-id "04"
:proposal-version -1
:trans-version "20070709"
:date "20-Sep-2007 17:54:55.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "26"
:si-bright-earth-limb-angle 20.0
:data-volume 358528
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 11352
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 11352
:visit-id "04"
:orbit-number 1
:pcs-time 355
:si-vis-utilization 2520
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3149
:pcs-gap 0
)
true10true/home/galaxy/dong/OP-cache/proposal11352-v04.xmltrue/tmp/OPVisit24242.xml
(Tic-Visit
:proposal-id 11352
:visit-id "05"
:proposal-version -1
:trans-version "20070709"
:date "20-Sep-2007 17:55:12.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "23"
:si-bright-earth-limb-angle 20.0
:data-volume 742064
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 11352
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 11352
:visit-id "05"
:orbit-number 1
:pcs-time 355
:si-vis-utilization 2730
:al-overhead-at-end 0
:internal-dur-at-end 120
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3149
:pcs-gap 0
)
true10true/home/galaxy/dong/OP-cache/proposal11352-v05.xml