0 Assigned ID: 2049 ----- Attempting Submission 1 (Sat Mar 02 00:41:10 GMT 2013) ----- HST Phase I Proposal 2049 (wd08006.apt) successfully submitted. Here is the Phase II submission for 13428. The visits and exposures are largely based on those from HST program 12815 (PI: Luhman), which observed this same target in different WFC3/IR filter (F110W). -42509092 ----- Attempting Submission 1 (Mon Jun 24 22:58:27 GMT 2013) ----- Characterizing the Ultra-cold Brown Dwarf WD 0806-661B WD 0806-661B, a common proper motion companion to a white dwarf, was discovered by multi-epoch Spitzer observations. The IRAC colors and absolute magnitudes indicate that it is a brown dwarf approximately as cold as the >=Y2 dwarf WISE 1828+2650, the coldest spectroscopically confirmed brown dwarf (Teff ~300K). WD 0806-661B is too faint for spectroscopy, so we propose to characterize this object with multi-wavelength WFC3/IR observations. The photometry will not only allow us to characterize WD 0806-661B as a cold brown dwarf, it will also provide insight into the rapidly changing J-ch2, J-H, and Y-J colors exhibited by the Y dwarfs. The observations will also help bridge the gap between "normal" Y dwarfs and the enigmatic WISE 1828+2650. Over 7 orbits, we will obtain observations of a single, faint point source in four WFC3/IR filters: F105W (3 orbits), F125W (1 orbit), F127M (1 orbit), and F160W (2 orbits). For each orbit, we will use the WFC3-IR-DITHER-LINE-3PT dither pattern to acquire three 1000 sec exposures (NSAMP=11, SAMP-SEQ=SPAR100). For the F160W and F105W visits, we will offset the 3-point dither pattern in the 2nd and 3rd orbits by 0.4725 arcsec with respect to the previous orbit, thereby creating 6- and 9-point dither patterns for F160W and F105W, respectively. No timing constraints have been applied to any visit in this program. COOL STARS Default false false false false false SUPPORTED STAR BROWN DWARF LOW MASS COMPANION J2000 J2000 WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F105W WFC3/IR Imaging No No F125W WFC3/IR Imaging No No F160W POS-TARG DITHER DITHER 3 0.4725 WFC3-IR-DITHER-LINE-3PT false false 0.605 3 0 POS-TARG LINE 41.788 1 true POS-TARG DITHER DITHER 3 0.4725 WFC3-IR-DITHER-LINE-3PT false false 0.605 2 0 POS-TARG LINE 41.788 2 true POS-TARG DITHER 0.605 LINE false false 3 41.788 WFC3-IR-DITHER-LINE-3PT 3 false /private/var/folders/8l/qf7r236d5k5fq607821x7xfr0000gq/T/OPVisit4342656550356223390.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13428 :visit-id "01" :proposal-version -1 :trans-version "20130502" :date "24-Jun-2013 15:47:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880128 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13428 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13428 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13428 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13428 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 652 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) true 3 0 /private/var/folders/8l/qf7r236d5k5fq607821x7xfr0000gq/T/OPVisit8637600045975211231.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13428 :visit-id "02" :proposal-version -1 :trans-version "20130502" :date "24-Jun-2013 15:47:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 626720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13428 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13428 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 234 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) true 1 0 /private/var/folders/8l/qf7r236d5k5fq607821x7xfr0000gq/T/OPVisit6863769799366036124.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13428 :visit-id "03" :proposal-version -1 :trans-version "20130502" :date "24-Jun-2013 15:47:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 626720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13428 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13428 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 234 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) true 1 0 /private/var/folders/8l/qf7r236d5k5fq607821x7xfr0000gq/T/OPVisit6888219777904361749.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13428 :visit-id "04" :proposal-version -1 :trans-version "20130502" :date "24-Jun-2013 15:47:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1253424 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13428 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13428 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13428 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3175 :al-overhead-at-end 0 :internal-dur-at-end 424 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) true 2 0