18011( 2) - 12-Aug-2025 17:41:39 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18011 Version: 2 Check-in Time: 12-Aug-2025 17:41:39 STScI Edit Number: 0 Title White dwarfs with inconsistent ages in young open clusters ------------------------------------------------------------------------------------ Type Cycle GO 33 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Na'ama Hallakoun Weizmann Institute of Science Y CoI: Dr. Sahar Shahaf Weizmann Institute of Science Y CoI: Dr. Sagi Ben-Ami Weizmann Institute of Science Y CoI: Mr. Oren Ironi Weizmann Institute of Science Y ------------------------------------------------------------------------------------ Abstract The third data realse of Gaia has unveiled a large population of white dwarfs with main-sequence companions at orbital separations of ~1AU, indicating a history of mass transfer between the two companions. Recently, a subsample of these systems that are located in open clusters was used in order to estimate the mass of the white dwarf's progenitor, and to constrain its evolutionary history. A few of these systems that are located in young open clusters displayed inconsistencies between the cluster and the white dwarf ages, where the estimated white dwarf cooling age appeared older than the cluster. The UV excess and age measurements relied on single-band GALEX photometry alone (mostly NUV), as the optical and infrared are dominated by the main-sequence companion. Here we request ACS/SBC FUV photometry for six of these systems, in order to get a more reliable measurement of the flux of the white dwarf, that will confirm/refute the age inconsistency. The SBC filters will allow us to construct the spectral enetry distribution of the targets in the FUV, constraining their effective temperatures and revealing broad absorption features that could contribute to the age estimate inconsistency. If the system is confirmed to be older than the cluster, it would represent the first evidence of a star captured from the field into an open cluster. ------------------------------------------------------------------------------------ Observations Description ------------------------ For each of our six targets, we request FUV photometry using ACS/SBC long-pass filters: F115LP, F125LP, F140LP, F150LP, and F165LP. As suggested in the ACS instrument handbook, we will subtract the F165LP measurement from each of the other filters, in order to avoid the red flux contamination from the bright MS companion. This will allow us to construct the SED of the system in the FUV. We have verified that exposures of less than 1 min per filter are required in most cases and less than 8 min in the worst case to achieve a minimal signal-to-noise ratio (SNR) of 10 in the F165LP-subtracted bands. We will spend one HST orbit on each target, maximizing the SNR by taking longer exposures. A photometric SNR above 10 in the F165LP-subtracted bands corresponds to a 2.5% error of the 18011( 2) - 12-Aug-2025 17:41:39 - [ 2] WD effective temperature (calculated using a Monte-Carlo experiment covering a wide range of WD masses and compositions, assuming additive and Gaussian white noise and accounts for systematic errors due to the model grids and extinction of 250 K). This error then translates to a WD cooling age precision better than 20%, in most regions of parameter space (also calculated using a Monte-Carlo experiment and represents the typical 5% uncertainty in WD mass and the inherent overlap between models of different internal compositions and atmospheres). In parallel, we are actively pursuing follow-up ground-based spectroscopic observations of these systems and selected cluster members to further confirm their association with the cluster (some of these are already secured on the Magellan telescope) ------------------------------------------------------------------------------------ 18011( 2) - 12-Aug-2025 17:41:39 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GAIADR3-5347 STAR, COMPOSITE RA=01H38M2.0704S, J2000 V = 14.392 +/- 0.002 NUV=19.89 400284043331 SPECTRAL TYPE, DA, DEC=+73D02'15.80" 84 F3-F9 Reference Frame: ICRS Comments: Astrometric binary identified by Gaia. NUV magnitude from Galex. Astrometry and photometry suggest this is an MS+WD binary. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 -4.0220235795852854E-4 -2.8948E-4 0.00113928 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-1999 STAR, COMPOSITE RA=22H25M3.2482S, J2000 V = 13.73 +/- 0.005 NUV=19.61 875247073083 SPECTRAL TYPE, DA, G DEC=+50D22'9.37" 648 V-IV, K III-I Reference Frame: ICRS Comments: Astrometric binary identified by Gaia. NUV magnitude from Galex. Astrometry and photometry suggest this is an MS+WD binary. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 5.309746018719931E-4 7.119E-5 0.00294995 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-2174 STAR, A4-A9 III-I, RA=21H40M30.3817S, J2000 V = 13.085 +/- 0.002 NUV=17.49 275039828118 COMPOSITE SPECTRAL DEC=+53D59'18.35" 912 TYPE, DA Reference Frame: ICRS Comments: Astrometric binary identified by Gaia. NUV magnitude from Galex. Astrometry and photometry suggest this is an MS+WD binary. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 -4.3525006478293047E-4 -0.0036030899999999998 0.0010411 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-2194 STAR, COMPOSITE RA=20H46M53.2082S, J2000 V = 14.763 +/- 0.003 NUV=21.21 332434010280 SPECTRAL TYPE, DA, DEC=+61D14'33.87" 960 F3-F9 Reference Frame: ICRS Comments: Astrometric binary identified by Gaia. NUV magnitude from Galex. Astrometry and photometry suggest this is an MS+WD binary. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 -2.898081808756092E-4 -0.00372157 0.00112036 ------------------------------------------------------------------------------------------------------------------------------------ 18011( 2) - 12-Aug-2025 17:41:39 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-2205 STAR, A0-A3 III-I, RA=22H36M11.7921S, J2000 V = 12.962 +/- 0.002 NUV=17.43 542917130608 COMPOSITE SPECTRAL DEC=+64D08'3.95" 512 TYPE, DA Reference Frame: ICRS Comments: Astrometric binary identified by Gaia. NUV magnitude from Galex. Astrometry and photometry suggest this is an MS+WD binary. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 -4.5940374008351676E-4 -0.0012533000000000002 0.00109239 ------------------------------------------------------------------------------------------------------------------------------------ 6 GAIADR3-2919 STAR, A4-A9 V-IV, RA=06H39M55.6932S, J2000 V = 12.698 +/- 0.002 FUV=20.06 695270059319 COMPOSITE SPECTRAL DEC=-27D11'9.21" 808 TYPE, DA Reference Frame: ICRS Comments: Astrometric binary identified by Gaia. NUV magnitude from Galex. Astrometry and photometry suggest this is an MS+WD binary. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2016.0 -2.1074376169403315E-4 0.0032504300000000003 0.00111767 ------------------------------------------------------------------------------------------------------------------------------------ 18011( 2) - 12-Aug-2025 17:41:39 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.472 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 44.4 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 18011( 2) - 12-Aug-2025 17:41:39 - [ 6] Visit: 01 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 GAIADR3-534 ACS/SBC ACCUM SBC F115LP 1 260 S (520 PATTERN 1 1 74002840433 S) 3184 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-534 ACS/SBC ACCUM SBC F125LP 1 260 S (520 PATTERN 1 2 74002840433 S) 3184 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-534 ACS/SBC ACCUM SBC F140LP 1 160 S (320 PATTERN 1 3 74002840433 S) 3184 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-534 ACS/SBC ACCUM SBC F150LP 1 160 S (320 PATTERN 1 4 74002840433 S) 3184 ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-534 ACS/SBC ACCUM SBC F165LP 1 160 S (320 PATTERN 1 5 74002840433 S) 3184 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-53474002840 1 ACS/SBC ACCUM SBC F115LP 1 none none none 1 N/A 4333184 GAIADR3-53474002840 1 ACS/SBC ACCUM SBC F115LP 2 none none none 1 N/A 4333184 GAIADR3-53474002840 2 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A 4333184 GAIADR3-53474002840 2 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A 4333184 GAIADR3-53474002840 3 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A 4333184 GAIADR3-53474002840 3 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A 4333184 GAIADR3-53474002840 4 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A 4333184 GAIADR3-53474002840 4 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A 4333184 18011( 2) - 12-Aug-2025 17:41:39 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-53474002840 5 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A 4333184 GAIADR3-53474002840 5 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A 4333184 18011( 2) - 12-Aug-2025 17:41:39 - [ 8] 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 GAIADR3-199 ACS/SBC ACCUM SBC F115LP 1 250 S (500 PATTERN 1 1 98752470730 S) 83648 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-199 ACS/SBC ACCUM SBC F125LP 1 250 S (500 PATTERN 1 2 98752470730 S) 83648 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-199 ACS/SBC ACCUM SBC F140LP 1 150 S (300 PATTERN 1 3 98752470730 S) 83648 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-199 ACS/SBC ACCUM SBC F150LP 1 150 S (300 PATTERN 1 4 98752470730 S) 83648 ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-199 ACS/SBC ACCUM SBC F165LP 1 150 S (300 PATTERN 1 5 98752470730 S) 83648 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-19998752470 1 ACS/SBC ACCUM SBC F115LP 1 none none none 1 N/A 73083648 GAIADR3-19998752470 1 ACS/SBC ACCUM SBC F115LP 2 none none none 1 N/A 73083648 GAIADR3-19998752470 2 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A 73083648 GAIADR3-19998752470 2 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A 73083648 GAIADR3-19998752470 3 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A 73083648 GAIADR3-19998752470 3 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A 73083648 GAIADR3-19998752470 4 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A 73083648 GAIADR3-19998752470 4 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A 73083648 18011( 2) - 12-Aug-2025 17:41:39 - [ 9] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-19998752470 5 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A 73083648 GAIADR3-19998752470 5 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A 73083648 18011( 2) - 12-Aug-2025 17:41:39 - [ 10] 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 GAIADR3-217 ACS/SBC ACCUM SBC F115LP 1 150 S (300 PATTERN 1 1 42750398281 S) 18912 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-217 ACS/SBC ACCUM SBC F125LP 1 150 S (300 PATTERN 1 2 42750398281 S) 18912 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-217 ACS/SBC ACCUM SBC F140LP 1 150 S (300 PATTERN 1 3 42750398281 S) 18912 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-217 ACS/SBC ACCUM SBC F150LP 1 250 S (500 PATTERN 1 4 42750398281 S) 18912 ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-217 ACS/SBC ACCUM SBC F165LP 1 250 S (500 PATTERN 1 5 42750398281 S) 18912 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-21742750398 1 ACS/SBC ACCUM SBC F115LP 1 none none none 1 N/A 28118912 GAIADR3-21742750398 1 ACS/SBC ACCUM SBC F115LP 2 none none none 1 N/A 28118912 GAIADR3-21742750398 2 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A 28118912 GAIADR3-21742750398 2 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A 28118912 GAIADR3-21742750398 3 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A 28118912 GAIADR3-21742750398 3 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A 28118912 GAIADR3-21742750398 4 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A 28118912 GAIADR3-21742750398 4 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A 28118912 18011( 2) - 12-Aug-2025 17:41:39 - [ 11] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-21742750398 5 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A 28118912 GAIADR3-21742750398 5 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A 28118912 18011( 2) - 12-Aug-2025 17:41:39 - [ 12] Visit: 04 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 GAIADR3-219 ACS/SBC ACCUM SBC F115LP 1 200 S (400 PATTERN 1 1 43324340102 S) 80960 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-219 ACS/SBC ACCUM SBC F125LP 1 200 S (400 PATTERN 1 2 43324340102 S) 80960 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-219 ACS/SBC ACCUM SBC F140LP 1 170 S (340 PATTERN 1 3 43324340102 S) 80960 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-219 ACS/SBC ACCUM SBC F150LP 1 200 S (400 PATTERN 1 4 43324340102 S) 80960 ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-219 ACS/SBC ACCUM SBC F165LP 1 200 S (400 PATTERN 1 5 43324340102 S) 80960 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-21943324340 1 ACS/SBC ACCUM SBC F115LP 1 none none none 1 N/A 10280960 GAIADR3-21943324340 1 ACS/SBC ACCUM SBC F115LP 2 none none none 1 N/A 10280960 GAIADR3-21943324340 2 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A 10280960 GAIADR3-21943324340 2 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A 10280960 GAIADR3-21943324340 3 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A 10280960 GAIADR3-21943324340 3 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A 10280960 GAIADR3-21943324340 4 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A 10280960 GAIADR3-21943324340 4 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A 10280960 18011( 2) - 12-Aug-2025 17:41:39 - [ 13] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-21943324340 5 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A 10280960 GAIADR3-21943324340 5 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A 10280960 18011( 2) - 12-Aug-2025 17:41:39 - [ 14] Visit: 05 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 GAIADR3-220 ACS/SBC ACCUM SBC F115LP 1 150 S (300 PATTERN 1 1 55429171306 S) 08512 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-220 ACS/SBC ACCUM SBC F125LP 1 150 S (300 PATTERN 1 2 55429171306 S) 08512 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-220 ACS/SBC ACCUM SBC F140LP 1 150 S (300 PATTERN 1 3 55429171306 S) 08512 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-220 ACS/SBC ACCUM SBC F150LP 1 250 S (500 PATTERN 1 4 55429171306 S) 08512 ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-220 ACS/SBC ACCUM SBC F165LP 1 250 S (500 PATTERN 1 5 55429171306 S) 08512 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-22055429171 1 ACS/SBC ACCUM SBC F115LP 1 none none none 1 N/A 30608512 GAIADR3-22055429171 1 ACS/SBC ACCUM SBC F115LP 2 none none none 1 N/A 30608512 GAIADR3-22055429171 2 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A 30608512 GAIADR3-22055429171 2 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A 30608512 GAIADR3-22055429171 3 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A 30608512 GAIADR3-22055429171 3 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A 30608512 GAIADR3-22055429171 4 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A 30608512 GAIADR3-22055429171 4 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A 30608512 18011( 2) - 12-Aug-2025 17:41:39 - [ 15] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-22055429171 5 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A 30608512 GAIADR3-22055429171 5 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A 30608512 18011( 2) - 12-Aug-2025 17:41:39 - [ 16] Visit: 06 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 GAIADR3-291 ACS/SBC ACCUM SBC F115LP 1 150 S (300 PATTERN 1 1 96952700593 S) 19808 ------------------------------------------------------------------------------------------------------------------------------------ 2 GAIADR3-291 ACS/SBC ACCUM SBC F125LP 1 150 S (300 PATTERN 1 2 96952700593 S) 19808 ------------------------------------------------------------------------------------------------------------------------------------ 3 GAIADR3-291 ACS/SBC ACCUM SBC F140LP 1 150 S (300 PATTERN 1 3 96952700593 S) 19808 ------------------------------------------------------------------------------------------------------------------------------------ 4 GAIADR3-291 ACS/SBC ACCUM SBC F150LP 1 250 S (500 PATTERN 1 4 96952700593 S) 19808 ------------------------------------------------------------------------------------------------------------------------------------ 5 GAIADR3-291 ACS/SBC ACCUM SBC F165LP 1 250 S (500 PATTERN 1 5 96952700593 S) 19808 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-29196952700 1 ACS/SBC ACCUM SBC F115LP 1 none none none 1 N/A 59319808 GAIADR3-29196952700 1 ACS/SBC ACCUM SBC F115LP 2 none none none 1 N/A 59319808 GAIADR3-29196952700 2 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A 59319808 GAIADR3-29196952700 2 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A 59319808 GAIADR3-29196952700 3 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A 59319808 GAIADR3-29196952700 3 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A 59319808 GAIADR3-29196952700 4 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A 59319808 GAIADR3-29196952700 4 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A 59319808 18011( 2) - 12-Aug-2025 17:41:39 - [ 17] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GAIADR3-29196952700 5 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A 59319808 GAIADR3-29196952700 5 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A 59319808 18011( 2) - 12-Aug-2025 17:41:39 - [ 18] Summary Form for Proposal 18011 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2, PATTERN 1 3, PATTERN 1 4, PATTERN 1 5 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F115LP, F125LP, F140LP, F150LP, F165LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names GAIADR3-1999875247073083648, GAIADR3-2174275039828118912, GAIADR3-2194332434010280960, GAIADR3-2205542917130608512, GAIADR3-2919695270059319808, GAIADR3-534740028404333184 ------------------------------------------------------------------------------------------------------------------------------------