17898( 3) - 10-Mar-2025 15:41:59 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17898 Version: 3 Check-in Time: 10-Mar-2025 15:41:59 STScI Edit Number: 0 Title Compactness and accretion rates of QPE disks: Constraining models with XMM+HST ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Muryel Guolo The Johns Hopkins University Y CoI: Dr. Thomas Wevers Space Telescope Science Institute Y CoI: Dr. Matt Nicholl Queen's University Belfast N CoI: Mr. Andrew Mummery University of Oxford N CoI: Dr. Suvi Gezari Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract We propose simultaneous X-ray and UV/optical observations of five Quasi-Periodic Eruption (QPEs) sources using XMM-Newton and Hubble Space Telescope. QPEs are believed to be produced by either accretion disk instabilities or interactions between orbiting bodies and massive black holes (or their accretion disks), and may provide a unique opportunity to study extreme mass ratio inspirals systems. Using recently developed disk models, we will constrain key parameters such as Eddington ratios and disk sizes by modeling these sources full spectral energy distribution in their quiescent disk phase. These results will critically test competing models for QPE origins and provide valuable legacy data for this newly discovered class of transient phenomena. ------------------------------------------------------------------------------------ Observations Description ------------------------ Multi-band WFC3/UVIS imaging observations of galactic nuclei. 1 orbit / source in which we use a 2 point dither pattern for each filter as recommended in the IHB. For three of the sources (ERO-QPE4, ERO-QPE2 and RXJ1301) coordinated observations with XMM-Newton, with a separation of up to 120 days, is desired. For the other two sources (ERO-QPE3 and ERO-QPE1) the observations can be taken at any period of the cycle. ------------------------------------------------------------------------------------ 17898( 3) - 10-Mar-2025 15:41:59 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ERO-QPE4 GALAXY, ACCRETION DISK, RA=04H45M33.8000S, J2000 V = 15.85 +/- 0.1 NUCLEUS DEC=-10D12'4.70" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 RXJ1301 GALAXY, ACCRETION DISK, RA=13H02M0.1400S, J2000 V = 17.1 +/- 0.1 NUCLEUS DEC=+27D46'57.90" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 ERO-QPE2 GALAXY, ACCRETION DISK, RA=02H34M48.9700S, J2000 V = 16.85 +/- 0.1 NUCLEUS DEC=-44D19'31.60" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17898( 3) - 10-Mar-2025 15:41:59 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17898( 3) - 10-Mar-2025 15:41:59 - [ 4] Visit: 01 (eRO-QPE4) 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 ERO-QPE4 WFC3/UVI ACCUM UVIS2-C1K F225W FLASH=20 1 400 S (800 PATTERN 1 1 S 1C-CTE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ERO-QPE4 WFC3/UVI ACCUM UVIS2-2K2 F438W FLASH=16 1 240 S (480 PATTERN 1 2-3 S C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ERO-QPE4 WFC3/UVI ACCUM UVIS2-2K2 F625W FLASH=15 1 200 S (400 S C-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 | ------------------------------------------------------------------------------------------------------------------------------------ ERO-QPE4 1 WFC3/UVI ACCUM UVIS2-C1 F225W 1 none none none 1 N/A S K1C-CTE ERO-QPE4 1 WFC3/UVI ACCUM UVIS2-C1 F225W 2 none none none 1 N/A S K1C-CTE ERO-QPE4 2 WFC3/UVI ACCUM UVIS2-2K F438W 1 none none none 1 N/A S 2C-SUB ERO-QPE4 2 WFC3/UVI ACCUM UVIS2-2K F438W 2 none none none 1 N/A S 2C-SUB ERO-QPE4 3 WFC3/UVI ACCUM UVIS2-2K F625W 1 none none none 1 N/A S 2C-SUB ERO-QPE4 3 WFC3/UVI ACCUM UVIS2-2K F625W 2 none none none 1 N/A S 2C-SUB 17898( 3) - 10-Mar-2025 15:41:59 - [ 5] Visit: 02 (eRO-QPE2) 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 ERO-QPE2 WFC3/UVI ACCUM UVIS2-C1K F225W FLASH=20 1 840 S PATTERN 1 1 S 1C-CTE (1680 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ERO-QPE2 WFC3/UVI ACCUM UVIS2-2K2 F625W FLASH=15 1 245 S (490 PATTERN 1 2 S C-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 | ------------------------------------------------------------------------------------------------------------------------------------ ERO-QPE2 1 WFC3/UVI ACCUM UVIS2-C1 F225W 1 none none none 1 N/A S K1C-CTE ERO-QPE2 1 WFC3/UVI ACCUM UVIS2-C1 F225W 2 none none none 1 N/A S K1C-CTE ERO-QPE2 2 WFC3/UVI ACCUM UVIS2-2K F625W 1 none none none 1 N/A S 2C-SUB ERO-QPE2 2 WFC3/UVI ACCUM UVIS2-2K F625W 2 none none none 1 N/A S 2C-SUB 17898( 3) - 10-Mar-2025 15:41:59 - [ 6] Visit: 03 (RXJ1301) 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 RXJ1301 WFC3/UVI ACCUM UVIS2-C1K F225W FLASH=20 1 595 S PATTERN 1 1 S 1C-CTE (1190 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 RXJ1301 WFC3/UVI ACCUM UVIS2-2K2 F438W FLASH=20 1 140 S (280 PATTERN 1 2-3 S C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 RXJ1301 WFC3/UVI ACCUM UVIS2-2K2 F625W FLASH=20 1 110 S (220 S C-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 | ------------------------------------------------------------------------------------------------------------------------------------ RXJ1301 1 WFC3/UVI ACCUM UVIS2-C1 F225W 1 none none none 1 N/A S K1C-CTE RXJ1301 1 WFC3/UVI ACCUM UVIS2-C1 F225W 2 none none none 1 N/A S K1C-CTE RXJ1301 2 WFC3/UVI ACCUM UVIS2-2K F438W 1 none none none 1 N/A S 2C-SUB RXJ1301 2 WFC3/UVI ACCUM UVIS2-2K F438W 2 none none none 1 N/A S 2C-SUB RXJ1301 3 WFC3/UVI ACCUM UVIS2-2K F625W 1 none none none 1 N/A S 2C-SUB RXJ1301 3 WFC3/UVI ACCUM UVIS2-2K F625W 2 none none none 1 N/A S 2C-SUB 17898( 3) - 10-Mar-2025 15:41:59 - [ 7] Summary Form for Proposal 17898 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-2K2C-SUB, UVIS2-C1K1C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=15, FLASH=16, FLASH=20 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2, PATTERN 1 2-3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F225W, F438W, F625W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ERO-QPE2, ERO-QPE4, RXJ1301 ------------------------------------------------------------------------------------------------------------------------------------