16220( 3) - 04-Jun-2020 20:58:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16220 Version: 3 Check-in Time: 04-Jun-2020 20:58:21 STScI Edit Number: 0 Title An Observational Anchor for Brown Dwarf Models ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Thomas G. Beatty University of Arizona Y CoI: Prof. John Evangelos Gizis University of Delaware N CoI: Dr. Michael Line Arizona State University N CoI: Dr. Mark S. Marley NASA Ames Research Center N CoI: Daniel J. Stevens The Pennsylvania State University N ------------------------------------------------------------------------------------ Abstract We wish to use 5 orbits of HST/WFC3 time to observe an eclipse spectrum of the only known transiting brown dwarf that has all of its physical properties independently measured at high precision, and that receives a negligible amount of external irradiation. Brown dwarfs evolve in both radius and temperature as they age, changing their atmospheric spectral emission with time. Understanding this evolution is important because it informs us about their interior structure, which ultimately helps constrain where the dividing line is between brown dwarfs that form through "star-like" Jeans-collapse or "planet-like" accretion. However, a fundamental problem in brown dwarf evolution and atmosphere models has been our inability to directly measure their basic physical properties, and no one has yet observed the atmosphere of a non-irradiated brown dwarf where we know all of them. The discovery of our target system finally allows us to conduct just this sort of observation using HST/WFC3 -- in conjuntion with archival Spitzer eclipse observations at 3.6um and 4.5um. Measuring the emission spectrum will allow us to perform a set of tests on brown dwarf evolution and atmospheres models with an an over-constrained physical system with no major free parameters. The results will provide a one-of-a-kind observational anchor for brown dwarfs. ------------------------------------------------------------------------------------ Observations Description ------------------------ These observations are to observe a secondary eclipse of AD 3116b using WFC3/G141. These observations will require 5 orbits to complete. The eclipse duration of AD 3116b is 3.1 hours, so we wish to observe for a minimum of 6.2 hours to see a suffcient amount of out-of-transit baseline. 6.2 hours of observations can be completed using 4 orbits, but we are also including 1 additional orbit at the beginning of each visit to allow the spacecraft and detector to settle and remove the initial systematic noise typical in observations using WFC3. We are using staring mode -- rather than scanning -- because AD 3116 is relatively faint. ------------------------------------------------------------------------------------ 16220( 3) - 04-Jun-2020 20:58:21 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 AD3116 STAR, BROWN DWARF, RA=08H42M39.3997S, J2000 J=14.348, H=13.769, K = 13.499 EXTRA-SOLAR PLANETARY DEC=+19D24'51.70" SYSTEM, M V-IV Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 -0.002601594968354884 -0.013132999993104022 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16220( 3) - 04-Jun-2020 20:58:21 - [ 3] Visit: 01 Visit Requirements: ORIENT 70D TO 100 D; ORIENT 260D TO 290 D; Period 1.9827991909009821 D AND ZERO-PHASE HJD2457179.9807242565 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 AD3116 WFC3/IR MULTIAC GRISM256 F160W NSAMP=4, SAMP-SEQ=SPARS5 1 DEF (7.327 PHASE 0.884 TO 0.896; CUM S) SEQ 1-2 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 AD3116 WFC3/IR MULTIAC GRISM256 G141 NSAMP=7, SAMP-SEQ=SPARS25 17 DEF CUM (2284.019 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AD3116 WFC3/IR MULTIAC GRISM256 F160W NSAMP=4, SAMP-SEQ=SPARS5 1 DEF (7.327 SEQ 3-4 NON-INT CUM S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AD3116 WFC3/IR MULTIAC GRISM256 G141 NSAMP=7, SAMP-SEQ=SPARS25 17 DEF CUM (2284.019 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 AD3116 WFC3/IR MULTIAC GRISM256 F160W NSAMP=4, SAMP-SEQ=SPARS5 1 DEF (7.327 SEQ 5-6 NON-INT CUM S) ------------------------------------------------------------------------------------------------------------------------------------ 6 AD3116 WFC3/IR MULTIAC GRISM256 G141 NSAMP=7, SAMP-SEQ=SPARS25 17 DEF CUM (2284.019 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 AD3116 WFC3/IR MULTIAC GRISM256 F160W NSAMP=4, SAMP-SEQ=SPARS5 1 DEF (7.327 SEQ 7-8 NON-INT CUM S) ------------------------------------------------------------------------------------------------------------------------------------ 8 AD3116 WFC3/IR MULTIAC GRISM256 G141 NSAMP=7, SAMP-SEQ=SPARS25 17 DEF CUM (2284.019 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 AD3116 WFC3/IR MULTIAC GRISM256 F160W NSAMP=4, SAMP-SEQ=SPARS5 1 DEF (7.327 SEQ 9-10 NON-INT CUM S) ------------------------------------------------------------------------------------------------------------------------------------ 10 AD3116 WFC3/IR MULTIAC GRISM256 G141 NSAMP=7, SAMP-SEQ=SPARS25 17 DEF CUM (2284.019 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 16220( 3) - 04-Jun-2020 20:58:21 - [ 4] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ AD3116 1 WFC3/IR MULTIAC GRISM256 F160W none none none none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM AD3116 2 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM AD3116 3 WFC3/IR MULTIAC GRISM256 F160W none none none none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 2 N/A CUM 16220( 3) - 04-Jun-2020 20:58:21 - [ 5] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 2 N/A CUM AD3116 4 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 2 N/A CUM AD3116 5 WFC3/IR MULTIAC GRISM256 F160W none none none none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 3 N/A CUM 16220( 3) - 04-Jun-2020 20:58:21 - [ 6] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 3 N/A CUM AD3116 6 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 3 N/A CUM AD3116 7 WFC3/IR MULTIAC GRISM256 F160W none none none none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 4 N/A CUM AD3116 8 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 4 N/A CUM 16220( 3) - 04-Jun-2020 20:58:21 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ AD3116 9 WFC3/IR MULTIAC GRISM256 F160W none none none none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 5 N/A CUM AD3116 10 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 5 N/A CUM 16220( 3) - 04-Jun-2020 20:58:21 - [ 8] Summary Form for Proposal 16220 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures GRISM256 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=4, NSAMP=7, SAMP-SEQ=SPARS25, SAMP-SEQ=SPARS5 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 260D TO 290 D, ORIENT 70D TO 100 D, PHASE 0.884 TO 0.896, Period 1.9827991909009821 D AND ZERO-PHASE HJD2457179.9807242565, SEQ 1-2 NON-INT, SEQ 3-4 NON-INT, SEQ 5-6 NON-INT, SEQ 7-8 NON-INT, SEQ 9-10 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, G141 ------------------------------------------------------------------------------------------------------------------------------------ Target Names AD3116 ------------------------------------------------------------------------------------------------------------------------------------