16055( 8) - 31-Dec-2019 19:49:56 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16055 Version: 8 Check-in Time: 31-Dec-2019 19:49:56 STScI Edit Number: 2 Title UNEXPECTED EARLY PERIASTRON PASSAGE AND ECLIPSE IN THE SYMBIOTIC SYSTEM R AQR ------------------------------------------------------------------------------------ Type Cycle GO/DD 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Margarita Karovska Smithsonian Institution Astrophysical Y Observatory CoI: Mr. Warren J. Hack Space Telescope Science Institute N CoI: Dr. John Charles Raymond Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract We propose ToO/DDT HST WFC3 observation of the R Aqr symbiotic system to obtain high S/N multiwavelength - UV to Optical - images of the binary environment and of the ejecta resulting from the recent - earlier then expected - periastron passage of the WD accretor. This observation is critical for studying this phenomenon (observable only about twice a century, with the next periastron passage expected in about 40 years). The effects of the periastron passage will include enhanced accretion and mass ejections and very likely new jet formation. ------------------------------------------------------------------------------------ Observations Description ------------------------ We request a total of 3 orbits, in 1 visit. We plan to carry out HST WFC3/UVIS imaging of R Aqr, using the 4-point dither mode in several filters. This approach will allow us to reach the maximum resolution of 0.025''/pixel and also assist in cosmic ray removal. This will nearly double the number of pixels covering the regions of interest. Furthermore, better sampling of the PSF will allow further enhancement in the resolution using deconvolution techniques such as Richardson-Lucy or EMC2. We have selected a set of filters to separate line and continuum emission , and to distinguish shocked from photoionized emission. The high-resolution images obtained in the spectral lines e.g., CII] 2326angstroms(A), Mg II 2800A, [OII] 3726A, [OIII] 5007A, H-alpha, and [SII] 6731A, will provide information on the ionization state of the gas. The CII] line can also help determine the (dust) extinction and it is sensitive to carbonatious grain-depletion. The Mg II 2800A line is expected to have a resonant scattering component and will also provide information on the ionization state of the gas. The [OII] 3726A line is a density indicator (the line is bright when the density is low). Furthermore, the [OII] 3726A/[CII] 2326A ratio is a good indicator of temperature and density characteristics of the gas. The SII] 6731A/H-alpha ratio will allow us to identify shocked vs. ionized gas emission, e.g., the ratio will be >=0.4 for shocked gas, and smaller for photoionized gas. The exposure times are based on the online WFC3 ETC calculations as verified by 16055( 8) - 31-Dec-2019 19:49:56 - [ 2] the 2017 WFC3 observations of R Aqr. We optimize the efficiency of the observing time by using subarray readouts (1024x1024 readout) to minimize the overheads, while still providing a >=40''x40'' field of view. The Phase II proposal was generated using the latest APT based on the desired exposure times to avoid saturation and on the use of dither patterns, and makes the most efficient use of the observing time. We are requesting non-disruptive ToO observations of R Aqr. We request observing within few weeks after the formal activation (of at all possible), other wise , not later then January. In the event a reduced gyro mode will need to be used for this proposal, it will not have any significant impact as long as the target is in the HST field-of-regard when the observations need to be taken in order to catch this time-sensitive behavior of the target since we have no roll constraints for our observations. ------------------------------------------------------------------------------------ 16055( 8) - 31-Dec-2019 19:49:56 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 V-R-AQR STAR, ACCRETION DISK, RA=23H43M49.4616S +/- 0.1", J2000 V = 10 +/- 3.0 INTERACTING BINARY, DEC=-15D17'4.20" +/- 0.1" JET, SYMBIOTIC STAR Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 16055( 8) - 31-Dec-2019 19:49:56 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type SPIRAL Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.86 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16055( 8) - 31-Dec-2019 19:49:56 - [ 5] Visit: 01 Visit Requirements: BEFORE 31-JAN-2020:00:00:00 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 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F502N FLASH=20.0 1 15 S (60 GS ACQ SCENARIO SINGLE; S 1C-SUB S) PATTERN 2 1-3 ------------------------------------------------------------------------------------------------------------------------------------ 2 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F373N FLASH=20 1 90 S (360 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F280N FLASH=20 1 130 S (520 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F656N FLASH=20 1 400 S (400 GS ACQ SCENARIO SINGLE S 1C-SUB 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F502N 1 none none none 1 N/A S K1C-SUB V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F502N 2 none none none 1 N/A S K1C-SUB V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F502N 3 none none none 1 N/A S K1C-SUB V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F502N 4 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F373N 1 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F373N 2 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F373N 3 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F373N 4 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F280N 1 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F280N 2 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F280N 3 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F280N 4 none none none 1 N/A S K1C-SUB 16055( 8) - 31-Dec-2019 19:49:56 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-R-AQR 4 WFC3/UVI ACCUM UVIS2-C1 F656N none none none none 1 N/A S K1C-SUB 16055( 8) - 31-Dec-2019 19:49:56 - [ 7] Visit: 02 Visit Requirements: 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 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F656N FLASH=20 1 20 S (80 GS ACQ SCENARIO SINGLE; S 1C-SUB S) PATTERN 2 1-4 ------------------------------------------------------------------------------------------------------------------------------------ 2 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F673N FLASH=20 1 20 S (80 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F336W FLASH=20 1 10 S (40 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F275W FLASH=20 1 180 S (720 S 1C-SUB 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none none 1 N/A S K1C-SUB V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none none 1 N/A S K1C-SUB V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none none 1 N/A S K1C-SUB V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F673N 1 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F673N 2 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F673N 3 none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F673N 4 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F336W 1 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F336W 2 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F336W 3 none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F336W 4 none none none 1 N/A S K1C-SUB 16055( 8) - 31-Dec-2019 19:49:56 - [ 8] 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-R-AQR 4 WFC3/UVI ACCUM UVIS2-C1 F275W 1 none none none 1 N/A S K1C-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS2-C1 F275W 2 none none none 1 N/A S K1C-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS2-C1 F275W 3 none none none 1 N/A S K1C-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS2-C1 F275W 4 none none none 1 N/A S K1C-SUB 16055( 8) - 31-Dec-2019 19:49:56 - [ 9] Visit: 03 Visit Requirements: 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 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F280N FLASH=20 1 455 S (455 GS ACQ SCENARIO SINGLE S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F373N FLASH=20 1 250 S (250 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 V-R-AQR WFC3/UVI ACCUM UVIS2-C1K F502N FLASH=20 1 450 S (450 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 V-R-AQR WFC3/UVI ACCUM UVIS-QUAD FQ232N FLASH=20 1 180 S (720 PATTERN 2 4 S -SUB 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-R-AQR 1 WFC3/UVI ACCUM UVIS2-C1 F280N none none none none 1 N/A S K1C-SUB V-R-AQR 2 WFC3/UVI ACCUM UVIS2-C1 F373N none none none none 1 N/A S K1C-SUB V-R-AQR 3 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A S K1C-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS-QUA FQ232N 1 none none none 1 N/A S D-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS-QUA FQ232N 2 none none none 1 N/A S D-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS-QUA FQ232N 3 none none none 1 N/A S D-SUB V-R-AQR 4 WFC3/UVI ACCUM UVIS-QUA FQ232N 4 none none none 1 N/A S D-SUB 16055( 8) - 31-Dec-2019 19:49:56 - [ 10] Summary Form for Proposal 16055 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-QUAD-SUB, UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=20, FLASH=20.0 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 31-JAN-2020:00:00:00, GS ACQ SCENARIO SINGLE, PATTERN 2 1-3, PATTERN 2 1-4, PATTERN 2 4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W, F280N, F336W, F373N, F502N, F656N, F673N, FQ232N ------------------------------------------------------------------------------------------------------------------------------------ Target Names V-R-AQR ------------------------------------------------------------------------------------------------------------------------------------