15468( 3) - 04-Dec-2018 22:54:37 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15468 Version: 3 Check-in Time: 04-Dec-2018 22:54:37 STScI Edit Number: 1 Title Backyard Worlds ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jacqueline Kelly Faherty American Museum of Natural History Y CoI: Dr. Daniella Carolina Bardalez American Museum of Natural History N Gagliuffi CoI: Dr. Adam Schneider Arizona State University N CoI: Dr. Marc Jason Kuchner NASA Goddard Space Flight Center N CoI: Dr. Sarah E Logsdon NASA Goddard Space Flight Center N CoI: Dr. Jonathan Gagne Carnegie Institution of Washington N CoI: Dr. Aaron Meisner National Optical Astronomy Observatory, N AURA ------------------------------------------------------------------------------------ Abstract Over the past five years, our view of the local solar neighborhood has changed drastically thanks to the Wide Field Infrared Survey Explorer (WISE). Not only did WISE redefine the five closest systems to the Sun with the discovery of Luhman16AB and WISE0855, but it also revealed the Sun's closest fly by and it defined an entirely new class of extremely cold and close compact objects: the Y dwarfs. At present, all but two of the Y dwarfs were discovered through a WISE single epoch photometric identification. As a whole, these objects are of critical importance to identifying the efficiency of star formation at the lowest masses. As individuals, each of these objects represents a unique probe into the complex chemistry present in the coldest photospheres produced in the Universe. Every single Y dwarf discovered is an observational treasure but the ones that are closest to the Sun are the gold standard for planetary characterization studies. In February 2017, we launched a citizen science project called Backyard Worlds: Planet 9 with the intention of scanning the entire sky using not just photometric information but positional as well to identify the coldest, closest, and fastest moving objects near the Sun. In this Mid-Cycle HST proposal, we have identified 5 tantalizingly fast moving objects that appear to be extremely cold hence potentially among the Sun's nearest neighbors. We ask for five orbits with HST to obtain critical F125W and F105W photometry which will allow us to decipher the nature of each target and prioritize for a JWST cycle 1 follow-up. ------------------------------------------------------------------------------------ Observations Description ------------------------ Our observations are straightforward and have been proven successful by prior HST Y dwarf follow-up programs (see results and summary of Y dwarf HST observations of known Y dwarfs in Schneider et al. 2015). We used known Y dwarfs and their F105W as well as F125W filter measurements from JWST to scale the estimates for our new candidate objects. Assuming a required S/N=30, as well as a (F125W-W2)=7 and a (F105W-F125W)=0, we estimate a requirement of 0.5 orbit per filter per target for a total of 5 orbits. 15468( 3) - 04-Dec-2018 22:54:37 - [ 2] ------------------------------------------------------------------------------------ 15468( 3) - 04-Dec-2018 22:54:37 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 WISE0014+795 STAR, BROWN DWARF RA=00H14M49.9600S, J2000 V = 23.135 1 DEC=+79D51'16.10" Reference Frame: ICRS Comments: No V-magnitude is available. The magnitude listed is the estimated F125W magnitude. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2010.5 1.401427468576134 -0.9872000000000001 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE0830+283 STAR, BROWN DWARF RA=08H30M11.9500S, J2000 V = 22.839 7 DEC=+28D37'16.00" Reference Frame: ICRS Comments: No V-magnitude is available. The magnitude listed is the estimated F125W magnitude. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2010.5 -0.007571903808478779 -2.1551 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 3 WISE1516+721 STAR, BROWN DWARF RA=15H16M20.3900S, J2000 V = 23.036 7 DEC=+72D17'45.40" Reference Frame: ICRS Comments: No V-magnitude is available. The magnitude listed is the estimated F125W magnitude. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2010.5 -0.11555390701542115 0.9753 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 4 WISE1525+605 STAR, BROWN DWARF RA=15H25M29.0900S, J2000 V = 22.888 3 DEC=+60D53'56.50" Reference Frame: ICRS Comments: No V-magnitude is available. The magnitude listed is the estimated F125W magnitude. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2010.5 -0.052911118297444236 0.8175 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 5 WISE0830-632 STAR, BROWN DWARF RA=08H30M19.9700S, J2000 V = 22.978 3 DEC=-63D23'5.40" Reference Frame: ICRS Comments: No V-magnitude is available. The magnitude listed is the estimated F125W magnitude. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2010.5 -0.002931575350116433 0.6661 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 15468( 3) - 04-Dec-2018 22:54:37 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 15468( 3) - 04-Dec-2018 22:54:37 - [ 5] Visit: 01 (W0014+7951) Visit Requirements: On Hold Comments: Additional Comments: F105W and F125W observations of W0014+7951. 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 WISE0014+79 WFC3/IR MULTIAC IR F105W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 1-2 51 CUM (1411.758 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE0014+79 WFC3/IR MULTIAC IR F125W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 51 CUM (1411.758 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISE0014+7951 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM WISE0014+7951 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM WISE0014+7951 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM WISE0014+7951 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM WISE0014+7951 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM WISE0014+7951 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM WISE0014+7951 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM WISE0014+7951 2 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15468( 3) - 04-Dec-2018 22:54:37 - [ 6] Visit: 02 (W0830+2837) Visit Requirements: On Hold Comments: Additional Comments: F105W and F125W observations of W0830+2837. 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 WISE0830+28 WFC3/IR MULTIAC IR F105W NSAMP=13, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 1-2 37 CUM (1211.754 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE0830+28 WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF 37 CUM (1311.756 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISE0830+2837 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM WISE0830+2837 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM WISE0830+2837 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM WISE0830+2837 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM WISE0830+2837 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM WISE0830+2837 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM WISE0830+2837 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM WISE0830+2837 2 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15468( 3) - 04-Dec-2018 22:54:37 - [ 7] Visit: 03 (W1516+7217) Visit Requirements: On Hold Comments: Additional Comments: F105W and F125W observations of W1516+7217. 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 WISE1516+72 WFC3/IR MULTIAC IR F105W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 1-2 17 CUM (1411.758 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE1516+72 WFC3/IR MULTIAC IR F125W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 17 CUM (1411.758 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15468( 3) - 04-Dec-2018 22:54:37 - [ 8] Visit: 04 (W1526+6053) Visit Requirements: On Hold Comments: Additional Comments: F105W and F125W observations of W1526+6053. 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 WISE1525+60 WFC3/IR MULTIAC IR F105W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 1-2 53 CUM (1311.756 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE1525+60 WFC3/IR MULTIAC IR F125W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 53 CUM (1411.758 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISE1525+6053 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM WISE1525+6053 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM WISE1525+6053 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM WISE1525+6053 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM WISE1525+6053 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM WISE1525+6053 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM WISE1525+6053 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM WISE1525+6053 2 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15468( 3) - 04-Dec-2018 22:54:37 - [ 9] Visit: 05 (W0830-6323) Visit Requirements: On Hold Comments: Additional Comments: F105W and F125W observations of W0830-6323. 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 WISE0830-63 WFC3/IR MULTIAC IR F105W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 1-2 23 CUM (1311.756 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE0830-63 WFC3/IR MULTIAC IR F125W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 23 CUM (1411.758 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISE0830-6323 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM WISE0830-6323 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM WISE0830-6323 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM WISE0830-6323 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM WISE0830-6323 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM WISE0830-6323 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM WISE0830-6323 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM WISE0830-6323 2 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15468( 3) - 04-Dec-2018 22:54:37 - [ 10] Visit: 53 (W1516+7217) Visit Requirements: On Hold Comments: Additional Comments: F105W and F125W observations of W1516+7217. (Repeat. HOPR 91421) 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 WISE1516+72 WFC3/IR MULTIAC IR F105W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 1-2 17 CUM (1411.758 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WISE1516+72 WFC3/IR MULTIAC IR F125W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 17 CUM (1411.758 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM WISE1516+7217 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM WISE1516+7217 2 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 15468( 3) - 04-Dec-2018 22:54:37 - [ 11] Summary Form for Proposal 15468 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, NSAMP=14, NSAMP=15, SAMP-SEQ=SPARS25 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1-2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F105W, F125W ------------------------------------------------------------------------------------------------------------------------------------ Target Names WISE0014+7951, WISE0830+2837, WISE0830-6323, WISE1516+7217, WISE1525+6053 ------------------------------------------------------------------------------------------------------------------------------------