Hi Galina, I'll be available for immediate comments M-F. ----- Submission 1 (Mon Sep 20 07:30:52 GMT 2004) ----- Hi Galina, I'm not sure how to correct the USE OFFSET error. The current version of the APT for the Mac platform does not show this option in the Special Requirements. Nevertheless, the first exposure in each visit is for coronagraphic acquisition (1.8 arcsec spot), and subsequent exposures are coronagraphic exposures. Cheers, Paul Dear Steve, After I last spoke with you, we performed a significant ammount of work to demonstrate that the Fomalhaut disk seen in the ACS/HRC images is real and not an artifact. We are now submitting a DDT proposal to obtain additional data that will image the ring around its entire permiter, at higher signal-to-noise, and in two colors. We believe these new data will have a significant scientific impact, and they will be very timely given the new Spitzer images of Fomalhaut's disk. Because of spacecraft orientations constraints to put the disk along a diagonal on the HRC CCD, the data are schedulable only in October. Therefore we hope this proposal can be reviewed quickly. Because of potential conflicts with other science and instrumentation teams, we would appreciate it if this proposal is reviewed discretely by only a few people. For example, we would recommend Ron Gilliland and/or Dana Backman (NASA/AMES, SOFIA) as highly qualified reviewers. Thanks, Paul Assigned ID: 1022 ----- Submission 1 (Thu Jul 29 18:23:29 GMT 2004) ----- Phase I Proposal 1022 (kalas_ddt) successfully submitted. We report the unexpected detection of the Fomalhaut debris disk in scattered light during one orbit of observation for our Cycle 12 program GO9862. This is a major discovery because Fomalhaut is now the closest (7.7 pc) and oldest (~200 Myr) debris disk detected in reflected light. We would like to request Director's Discretionary Time to further study the Fomalhaut disk. The goals are to image the disk around its entire perimeter, increase the signal-to-noise of the detection, and to obtain data at a second wavelength. We will perform a high-resolution study of radial and azimuthal disk asymmetries that are thought to arise from perturbations by planet-mass companions, and we will constrain the physical properties of grain material by obtaining the color of the disk. Because our original Cycle 12 program was designed to study point sources in the field, and the ACS/HRC coronagraph is a limited lifetime resource, it is necessary to acquire these additional data via Director's Discretionary Time during Cycle 13. The observational challenge of high contrast cannot be met by other observatories, and these data will complement new Spitzer results on the Fomalhaut disk at mid and far-infared wavelengths.

These are ACS HRC coronagraphic observations with the 1.8" occulting spot. The targets and observing mode are an extension of GO 9862, PI: Kalas. HD 172167 is the science target and two PSF reference stars are HD 216956 and HD 210418. ABSOLUTE ORIENT constraints are picked for HD 172167 in order to fit the extended nebulosity along the diagonal direction of the HRC CCD. For PSF subtraction, we request that the orbits are not interrupted by calibration observations during Earth occultation. We also request that orbits are scheduled consecutively. SCHEDULABILITY may be modified as needed to accomodate the scheduling of these observations. To ease the scheduling problems, we specify SCHEDULABILITY=100. The scheduling is mainly limited by the ABSOLUTE ORIENT constraints in Visit 11. If we have the ORIENT constraint between 23-24, the target can be scheduled Oct. 8, 2004. Between ORIENT 24-25 gives scheduling Oct. 8-9. ORIENT 25-26 gives scheduling Oct. 8-12. We prefer ORIENT 23-24 if it is schedulable. The program is broken up into two sets of five orbits (Visits 10-15, Visits 20-25) which are the F606W observaions. The third set of two visits (30-31) are the F814 observations. Each of these three sets should be a continous observing block, but for the purpose of scheduling ease, the three sets do not have to be contiguous. ISM AND CIRCUMSTELLAR MATTER 12 false false false false false SUPPORTED STAR A0-A3 V-IV This target specification has coordinates and proper motions only from the PPM catalog.;Fomalhaut will be used as a PSF subtraction star for Vega, and vice versa. Vega and Fomalhaut must be observed in consecutive orbits, with calibration programs suppressed during Earth occultation to make sure the HRC 1.8" occulting spot is kept in a fixed position.;Vega has high proper motion, over 10 HRC pixels / yr. ;Vega's declination is +38.783691944 Vega HR 7001 J2000 18 36 56.3300 +38 47 1.17 J2000 STAR A0-A3 V-IV This target specification has coordinates and proper motions only from the PPM catalog.;Fomalhaut will be used as a PSF subtraction star for Vega, and vice versa. Vega and Fomalhaut must be observed in consecutive orbits, with calibration programs suppressed during Earth occultation to make sure the HRC 1.8" occulting spot is kept in a fixed position.;Fomalhaut has high proper motion, over 10 HRC pixels per year.;Declination is -29.622236111 Fomalhaut HR 8728 J2000 22 57 39.0600 -29 37 20.10 J2000 EXT-STAR A0-A3 V-IV J2000 22 10 11.9000 +06 11 52.30 J2000 ACS/HRC Imaging Yes F814W ACS/HRC Imaging Yes F814W ACS/HRC Imaging Yes F814W ACS/HRC Imaging Yes F606W ACS/HRC Imaging Yes F606W ACS/HRC Imaging Yes F606W 1096399054220 (Tic-Visit :proposal-id 10390 :visit-id "10" :proposal-version -1 :trans-version "20040516" :date "28-Sep-2004 12:17:22.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 552720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10390 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) 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