16069( 10) - 30-Oct-2020 19:51:37 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16069 Version: 10 Check-in Time: 30-Oct-2020 19:51:37 STScI Edit Number: 8 Title TCP J21040470+4631129 - a highly evolved cataclysmic variable unmasked? ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Boris T. Gaensicke The University of Warwick Y CoI: Dr. Vitaly Neustroev University of Oulu, Dept. of Astronomy N CoI: Dr. Kim Page University of Leicester N CoI: Prof. Tom R. Marsh The University of Warwick N CoI: Prof. Christian Knigge University of Southampton N CoI: Dr. Julian P. Osborne University of Leicester N CoI: Prof. Juan Echevarria Universidad Nacional Autonoma de Mexico N (UNAM) CoI: Dr. Sergey Zharikov Universidad Nacional Autonoma de Mexico N (UNAM) CoI: Dr. Dean Townsley University of Alabama N CoI: Dr. Odette Fabiola Toloza The University of Warwick N Castillo ------------------------------------------------------------------------------------ Abstract The cataclysmic variable TCP J21040470+4631129 has been laying dormant in our backyard until July 12th, 2019, when it brightened from V=17.8 to V=8.4 in a matter of days, undergoing its first recorded dwarf nova outburst. TCP J2104+4631 is literally in our backyard: The accurate Gaia parallax places the system at 109.2+-1.5 pc, making it one of the closest of > 5000 known CVs. How did it manage to remain hidden to the intense scrutiny of the northern hemisphere by both the vast array of time-domain surveys and countless amateur observers? The only valid explanation is that its outburst recurrence time is extremely long, implying an exceptionally low mass loss rate of the donor, and that in turn suggests that this system may be an example of the predicted, but so far missing population of highly evolved and inconspicuous interacting binaries. We propose to obtain COS far-ultraviolet spectroscopy of TCP J2104+4631 spanning the full binary orbit to determine the masses of both stellar components, the chemical composition of the donor star, and to measure the effective temperature of the white dwarf as it emerges from the recent accretion eposide. Using these quantities, we will establish the evolutionary state of the system. Confirming that TCP J2104+4631 is one of the long sought-after highly evolved CVs that are predicted to dominate the Galactic population of these interacting binaries would provide strong support that these systems are effectively hiding from our view, alleviating the stark contrast between current theoretical and observational population studies. ------------------------------------------------------------------------------------ Observations Description ------------------------ The goal of these observations is to obtain high signal-to-noise far-ultraviolet spectra of the white dwarf in the dwarf nova 16069( 10) - 30-Oct-2020 19:51:37 - [ 2] TCPJ21040470+4631129, which was heated during a recent dwarf nova outburst. The planned COS spectroscopy will be used to measure the effictive temperature, and the abundances of the accreted material from the sharp photospheric metal lines. We use the G130M grating with two central wavelengths to maximise the wavelength covered by these observations, and to achieve gap-less coverage. We make use of all permitted FP-POS positions, i.e. 3 & 4 for @1291A, and 1, 2, 3, 4 @ 1222A. The @1291A and @1222A observations are split into two separate visits to facilitate the scheduling. We use a dispersed light target acquisition, and for the ETC simulations we adopted a white dwarf temperature of 25000K. Scaled to the (Gaia-based) distance of 109pc, this corresponds to a flux of 1e-13erg/cm2/s/AA @ 1300A. This program should not be affected in case that HST moves to a 2-gyro mode. ------------------------------------------------------------------------------------ 16069( 10) - 30-Oct-2020 19:51:37 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 TCP-J2104047 STAR, DWARF NOVA RA=21H04M4.6877S +/- 0.1", J2000 V = 15 Swift UVW1=13.0 0+4631129 DEC=+46D31'13.75" +/- 0.1" Reference Frame: ICRS Extended: NO Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 6.035017862952023E-4 -0.046319000000000006 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 TARGET01-SAF UNIDENTIFIED, BLANK RA-OFF=0.11S, DEC-OFF=-9.767", J2000 V = 15 E-TARGET FIELD FROM 1 Extended: NO Comments: This target is a blank piece of sky which is the bright object safe pointing and is 9.845 arcseconds away at a PA 172.8 degrees from TCP-J21040470+4631129. ------------------------------------------------------------------------------------------------------------------------------------ 3 TARGET01-SAF UNIDENTIFIED, BLANK RA-OFF=-0.47S, DEC-OFF=-8.516", J2000 V = 15 E-TARGET-HOP FIELD FROM 1 R Extended: NO Comments: This target is a blank piece of sky which is the bright object safe pointing and is 9.941 arcseconds away at a PA of 210.1 degrees from TCP-J21040470+4631129. ------------------------------------------------------------------------------------------------------------------------------------ 16069( 10) - 30-Oct-2020 19:51:37 - [ 4] Visit: 01 (COS spectroscopy, G130M @ 1291, 1222A) Visit Requirements: ORIENT 10D TO 255 D On Hold Comments: Additional Comments: Only two FP-POS settings allowed for the 1291A central wavelength. This should be scheduled in evening-local time. Flags need to be cleared during the work day. 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 TCP-J210404 COS/FUV ACQ/PEA PSA G130M 1291 LIFETIME-POS=LP4 1 5 S (5 S) USE OFFSET V01SAF 70+4631129 KXD Comments: We have good orbital phase coverage with Swift UVW1 (2600A) and SDSS u (3650A), amplitude and flux in the two bands are identical, so we adopt a flat spectrum in Flambda. At orbital minimum, the flux in Swift UVW1 is 2e-15 erg/cm2/s/AA, and we set up the target acquisition to achieve a S/N of 40 at that faintest phase. At orbital maximum, the system reaches 1.2e-14 erg/cm2/s/AA. This is a factor ~30 below the COS bright limit for the chosen setup. ------------------------------------------------------------------------------------------------------------------------------------ 2 TCP-J210404 COS/FUV ACQ/PEA PSA G130M 1291 STEP-SIZE=0.9, CENTER=DEF, 1 5 S (5 S) USE OFFSET V01SAF 70+4631129 KD NUM-POS=5, LIFETIME-POS=LP4 ------------------------------------------------------------------------------------------------------------------------------------ 3 TCP-J210404 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=3, 1 2480 S USE OFFSET V01SAF 70+4631129 G LIFETIME-POS=LP4 (2480 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TCP-J210404 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=4, 1 2919 S USE OFFSET V01SAF 70+4631129 G LIFETIME-POS=LP4 (2919 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=1, 1 1390 S USE OFFSET V01SAF 70+4631129 G LIFETIME-POS=LP4 (1390 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=2, 1 1386 S USE OFFSET V01SAF 70+4631129 G LIFETIME-POS=LP4 (1386 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=3, 1 1390 S USE OFFSET V01SAF 70+4631129 G LIFETIME-POS=LP4 (1390 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=4, 1 1386 S USE OFFSET V01SAF 70+4631129 G LIFETIME-POS=LP4 (1386 S) ------------------------------------------------------------------------------------------------------------------------------------ 16069( 10) - 30-Oct-2020 19:51:37 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TCP-J21040470+46311 1 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A 29 KXD TCP-J21040470+46311 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A 29 KD TCP-J21040470+46311 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 29 G TCP-J21040470+46311 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A 29 G TCP-J21040470+46311 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A 29 G TCP-J21040470+46311 6 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A 29 G TCP-J21040470+46311 7 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A 29 G TCP-J21040470+46311 8 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A 29 G 16069( 10) - 30-Oct-2020 19:51:37 - [ 6] Visit: 02 (S/C Visit) Visit Requirements: ORIENT 10D TO 255 D On Hold Comments: Additional Comments: This visit allocates and sets up the safeposition offset slot for science visit 01 which will use that slot. This S/C visit should go earlier in the week while science visit 01 will be at least 3 days later. Note: weekends are to be avoided since the CS must clear the target within 24 hours of HST execution. 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 TCP-J210404 S/C DATA V1 1 5 S (5 S) POS TARG 229.13, 70+4631129 -241.06; SAVE OFFSET V01SAF; SPEC COM INSTR ECSLOTSET; QESIPARM ANGLE 172.8; QESIPARM DIST 9.845 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TCP-J21040470+46311 1 S/C DATA V1 none none none none tbd N/A 29 16069( 10) - 30-Oct-2020 19:51:37 - [ 7] Visit: 03 (BOP Visit) Visit Requirements: ORIENT 10D TO 255 D On Hold Comments: Additional Comments: This visit is for BOP checking the safetarget only and should not execute onboard HST. 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 TARGET01-SA COS/FUV ACQ/PEA PSA G130M 1291 LIFETIME-POS=LP4 1 5 S (5 S) FE-TARGET KXD Comments: We have good orbital phase coverage with Swift UVW1 (2600A) and SDSS u (3650A), amplitude and flux in the two bands are identical, so we adopt a flat spectrum in Flambda. At orbital minimum, the flux in Swift UVW1 is 2e-15 erg/cm2/s/AA, and we set up the target acquisition to achieve a S/N of 40 at that faintest phase. At orbital maximum, the system reaches 1.2e-14 erg/cm2/s/AA. This is a factor ~30 below the COS bright limit for the chosen setup. ------------------------------------------------------------------------------------------------------------------------------------ 2 TARGET01-SA COS/FUV ACQ/PEA PSA G130M 1291 STEP-SIZE=0.9, CENTER=DEF, 1 5 S (5 S) FE-TARGET KD NUM-POS=5, LIFETIME-POS=LP4 ------------------------------------------------------------------------------------------------------------------------------------ 3 TARGET01-SA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=3, 1 2480 S FE-TARGET G LIFETIME-POS=LP4 (2480 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TARGET01-SA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=4, 1 2919 S FE-TARGET G LIFETIME-POS=LP4 (2919 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=1, 1 1390 S FE-TARGET G LIFETIME-POS=LP4 (1390 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=2, 1 1386 S FE-TARGET G LIFETIME-POS=LP4 (1386 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=3, 1 1390 S FE-TARGET G LIFETIME-POS=LP4 (1390 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=4, 1 1386 S FE-TARGET G LIFETIME-POS=LP4 (1386 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 | ------------------------------------------------------------------------------------------------------------------------------------ 16069( 10) - 30-Oct-2020 19:51:37 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TARGET01-SAFE-TARGE 1 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A T KXD TARGET01-SAFE-TARGE 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A T KD TARGET01-SAFE-TARGE 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A T G TARGET01-SAFE-TARGE 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A T G TARGET01-SAFE-TARGE 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A T G TARGET01-SAFE-TARGE 6 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A T G TARGET01-SAFE-TARGE 7 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A T G TARGET01-SAFE-TARGE 8 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A T G 16069( 10) - 30-Oct-2020 19:51:37 - [ 9] Visit: 04 (HOPR COS spectroscopy, G130M @ 1291, 1222A) Visit Requirements: ORIENT 45D TO 285 D On Hold Comments: Additional Comments: This should be scheduled in evening-local time.Flags need to be cleared during the work day. This is a HOPR for failed visit 01 Only two FP-POS settings allowed for the 1291A central wavelength. This should be scheduled in evening-local time. Flags need to be cleared during the work day. 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 TCP-J210404 COS/FUV ACQ/PEA PSA G130M 1291 LIFETIME-POS=LP4 1 5 S (5 S) USE OFFSET V04SAF 70+4631129 KXD Comments: We have good orbital phase coverage with Swift UVW1 (2600A) and SDSS u (3650A), amplitude and flux in the two bands are identical, so we adopt a flat spectrum in Flambda. At orbital minimum, the flux in Swift UVW1 is 2e-15 erg/cm2/s/AA, and we set up the target acquisition to achieve a S/N of 40 at that faintest phase. At orbital maximum, the system reaches 1.2e-14 erg/cm2/s/AA. This is a factor ~30 below the COS bright limit for the chosen setup. ------------------------------------------------------------------------------------------------------------------------------------ 2 TCP-J210404 COS/FUV ACQ/PEA PSA G130M 1291 STEP-SIZE=0.9, CENTER=DEF, 1 5 S (5 S) USE OFFSET V04SAF 70+4631129 KD NUM-POS=5, LIFETIME-POS=LP4 ------------------------------------------------------------------------------------------------------------------------------------ 3 TCP-J210404 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=3, 1 2480 S USE OFFSET V04SAF 70+4631129 G LIFETIME-POS=LP4 (2480 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 TCP-J210404 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=4, 1 2919 S USE OFFSET V04SAF 70+4631129 G LIFETIME-POS=LP4 (2919 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=1, 1 1390 S USE OFFSET V04SAF 70+4631129 G LIFETIME-POS=LP4 (1390 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=2, 1 1386 S USE OFFSET V04SAF 70+4631129 G LIFETIME-POS=LP4 (1386 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=3, 1 1390 S USE OFFSET V04SAF 70+4631129 G LIFETIME-POS=LP4 (1390 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 TCP-J210404 COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=4, 1 1386 S USE OFFSET V04SAF 70+4631129 G LIFETIME-POS=LP4 (1386 S) 16069( 10) - 30-Oct-2020 19:51:37 - [ 10] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TCP-J21040470+46311 1 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A 29 KXD TCP-J21040470+46311 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A 29 KD TCP-J21040470+46311 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A 29 G TCP-J21040470+46311 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A 29 G TCP-J21040470+46311 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A 29 G TCP-J21040470+46311 6 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A 29 G TCP-J21040470+46311 7 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A 29 G TCP-J21040470+46311 8 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A 29 G 16069( 10) - 30-Oct-2020 19:51:37 - [ 11] Visit: 05 (S/C Visit) Visit Requirements: ORIENT 45D TO 285 D On Hold Comments: Additional Comments: This visit allocates and sets up the safe position offset slot for science visit 04 which will use that slot. This S/C visit should go earlier in the week while visit 04 will be at least 3 days later.The S/C visit will contain only 1 exposure. Note: weekends are to be avoided since the CS must clear the target within 24 hours of HST execution. 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 TCP-J210404 S/C DATA V1 1 5 S (5 S) POS TARG 229.13, 70+4631129 -241.06; SAVE OFFSET V04SAF; SPEC COM INSTR ECSLOTSET; QESIPARM ANGLE 210.1; QESIPARM DIST 9.841 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TCP-J21040470+46311 1 S/C DATA V1 none none none none tbd N/A 29 16069( 10) - 30-Oct-2020 19:51:37 - [ 12] Visit: 06 (BOP VISIT) Visit Requirements: ORIENT 45D TO 285 D On Hold Comments: Additional Comments: This visit is for BOP checking the safe target only and should not execute onboard HST. 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 TARGET01-SA COS/FUV ACQ/PEA PSA G130M 1291 LIFETIME-POS=LP4 1 5 S (5 S) FE-TARGET-H KXD OPR Comments: We have good orbital phase coverage with Swift UVW1 (2600A) and SDSS u (3650A), amplitude and flux in the two bands are identical, so we adopt a flat spectrum in Flambda. At orbital minimum, the flux in Swift UVW1 is 2e-15 erg/cm2/s/AA, and we set up the target acquisition to achieve a S/N of 40 at that faintest phase. At orbital maximum, the system reaches 1.2e-14 erg/cm2/s/AA. This is a factor ~30 below the COS bright limit for the chosen setup. ------------------------------------------------------------------------------------------------------------------------------------ 2 TARGET01-SA COS/FUV ACQ/PEA PSA G130M 1291 STEP-SIZE=0.9, CENTER=DEF, 1 5 S (5 S) FE-TARGET-H KD NUM-POS=5, LIFETIME-POS=LP4 OPR ------------------------------------------------------------------------------------------------------------------------------------ 3 TARGET01-SA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=3, 1 2480 S FE-TARGET-H G LIFETIME-POS=LP4 (2480 S) OPR ------------------------------------------------------------------------------------------------------------------------------------ 4 TARGET01-SA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=300, FP-POS=4, 1 2919 S FE-TARGET-H G LIFETIME-POS=LP4 (2919 S) OPR ------------------------------------------------------------------------------------------------------------------------------------ 5 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=1, 1 1390 S FE-TARGET-H G LIFETIME-POS=LP4 (1390 S) OPR ------------------------------------------------------------------------------------------------------------------------------------ 6 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=2, 1 1386 S FE-TARGET-H G LIFETIME-POS=LP4 (1386 S) OPR ------------------------------------------------------------------------------------------------------------------------------------ 7 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=215, FP-POS=3, 1 1390 S FE-TARGET-H G LIFETIME-POS=LP4 (1390 S) OPR ------------------------------------------------------------------------------------------------------------------------------------ 8 TARGET01-SA COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=200, FP-POS=4, 1 1386 S FE-TARGET-H G LIFETIME-POS=LP4 (1386 S) OPR 16069( 10) - 30-Oct-2020 19:51:37 - [ 13] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ TARGET01-SAFE-TARGE 1 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A T-HOPR KXD TARGET01-SAFE-TARGE 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A T-HOPR KD TARGET01-SAFE-TARGE 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A T-HOPR G TARGET01-SAFE-TARGE 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A T-HOPR G TARGET01-SAFE-TARGE 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A T-HOPR G TARGET01-SAFE-TARGE 6 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 N/A T-HOPR G TARGET01-SAFE-TARGE 7 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A T-HOPR G TARGET01-SAFE-TARGE 8 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 N/A T-HOPR G 16069( 10) - 30-Oct-2020 19:51:37 - [ 14] Summary Form for Proposal 16069 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA, V1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, S/C ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAKD, ACQ/PEAKXD, DATA, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=200, BUFFER-TIME=215, BUFFER-TIME=300, CENTER=DEF, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, LIFETIME-POS=LP4, NUM-POS=5, STEP-SIZE=0.9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 10D TO 255 D, ORIENT 45D TO 285 D, POS TARG 229.13, -241.06, QESIPARM ANGLE 172.8, QESIPARM ANGLE 210.1, QESIPARM DIST 9.841, QESIPARM DIST 9.845, SAVE OFFSET V01SAF, SAVE OFFSET V04SAF, SPEC COM INSTR ECSLOTSET, USE OFFSET V01SAF, USE OFFSET V04SAF ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M ------------------------------------------------------------------------------------------------------------------------------------ Target Names TARGET01-SAFE-TARGET, TARGET01-SAFE-TARGET-HOPR, TCP-J21040470+4631129 ------------------------------------------------------------------------------------------------------------------------------------