16064( 3) - 18-Aug-2020 17:33:17 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16064 Version: 3 Check-in Time: 18-Aug-2020 17:33:17 STScI Edit Number: 1 Title External and internal heating in the old pulsar PSR B0950+08 ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. George G. Pavlov The Pennsylvania State University Y CoI: Dr. Oleg Y. Kargaltsev George Washington University N CoI: Prof. Yuri Shibanov Ioffe Physical Technical Institute N CoI: Dr. Jeremy Hare University of California - Berkeley N CoI: Dr. Bettina Posselt University of Oxford N ------------------------------------------------------------------------------------ Abstract PSR B0950+08 is a 17 Myr old bright radio pulsar at d=260 pc. X-ray observations of this pulsar provide a rare opportunity to test models of polar cap heating by precipitating magnetospheric particles, while the UV-optical observations can test models of internal heating in neutron stars, which are determined by fundamental properties of matter. The only previous XMM-Newton observation was not deep enough to reliably separate the polar cap and magnetospheric components, while optical observations with ground-based telescopes lacked the needed angular resolution. The proposed deep XMM-Newton observations, supplemented by an HST observation, will be the most detailed multiwavelength study of an old radio pulsar to date. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will observe the target in two visits. Visit 1 consists of two orbis in which the pulsar and a possible faint red galaxy nearby will be imaged with the ACS/WFC F775W filter. Visit 2 consists of one orbit in which the pulsar will be imaged in the WFC3/UVIS F475X filter. These two visits will provide the pulsar's fluxes in two spectral bands and the spectral slope of its magnetospheric emission. To mitigate the CTE losses for this faint target, we place the target close to the readouts of the WFC and UVIS detectors. Applying post-flash is not necessary with the long detections and broad filters used. ------------------------------------------------------------------------------------ 16064( 3) - 18-Aug-2020 17:33:17 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PSRB0950+08 STAR, PULSAR RA=09H53M9.3050S +/- 0.05", J2000 V = 27 +/- 1 DEC=+07D55'36.77" +/- 0.09" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 16064( 3) - 18-Aug-2020 17:33:17 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.262 Line_Spacing 0.192 Coordinate_Frame POS-TARG Pattern_Orient 18.39 Angle_Between_Sides 68.14 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.034 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.29 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16064( 3) - 18-Aug-2020 17:33:17 - [ 4] Visit: 01 (acs) 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 PSRB0950+08 ACS/WFC ACCUM WFC1-CTE F775W 1 1217 S PATTERN 1 1 (4981 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 | ------------------------------------------------------------------------------------------------------------------------------------ PSRB0950+08 1 ACS/WFC ACCUM WFC1-CTE F775W 1 none none none 1 N/A PSRB0950+08 1 ACS/WFC ACCUM WFC1-CTE F775W 2 none none none 1 N/A PSRB0950+08 1 ACS/WFC ACCUM WFC1-CTE F775W 3 none none none 2 N/A PSRB0950+08 1 ACS/WFC ACCUM WFC1-CTE F775W 4 none none none 2 1330.0 S 16064( 3) - 18-Aug-2020 17:33:17 - [ 5] Visit: 02 (uvis) 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 PSRB0950+08 WFC3/UVI ACCUM UVIS2-C51 F475X 1 605 S PATTERN 2 1 S 2C-CTE (2420 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 | ------------------------------------------------------------------------------------------------------------------------------------ PSRB0950+08 1 WFC3/UVI ACCUM UVIS2-C5 F475X 1 none none none 1 N/A S 12C-CTE PSRB0950+08 1 WFC3/UVI ACCUM UVIS2-C5 F475X 2 none none none 1 N/A S 12C-CTE PSRB0950+08 1 WFC3/UVI ACCUM UVIS2-C5 F475X 3 none none none 1 N/A S 12C-CTE PSRB0950+08 1 WFC3/UVI ACCUM UVIS2-C5 F475X 4 none none none 1 N/A S 12C-CTE 16064( 3) - 18-Aug-2020 17:33:17 - [ 6] Visit: 51 (acs) 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 PSRB0950+08 ACS/WFC ACCUM WFC1-CTE F775W 1 1217 S PATTERN 3 1 (2434 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 | ------------------------------------------------------------------------------------------------------------------------------------ PSRB0950+08 1 ACS/WFC ACCUM WFC1-CTE F775W 1 none none none 1 N/A PSRB0950+08 1 ACS/WFC ACCUM WFC1-CTE F775W 2 none none none 1 N/A 16064( 3) - 18-Aug-2020 17:33:17 - [ 7] Summary Form for Proposal 16064 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C512C-CTE, WFC1-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 1, PATTERN 3 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475X, F775W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PSRB0950+08 ------------------------------------------------------------------------------------------------------------------------------------