18127( 7) - 13-Feb-2026 13:29:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18127 Version: 7 Check-in Time: 13-Feb-2026 13:29:57 STScI Edit Number: 2 Title Imaging the Exceptional Nebulosity of the Suspected Iax Supernova Remnant of 1181 AD ------------------------------------------------------------------------------------ Type Cycle GO 33 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Robert A. Fesen Dartmouth College Y CoI: Dr. Dan Milisavljevic Purdue University N CoI: Dr. Tea Temim Princeton University N CoI: Dr. Daniel J. Patnaude Smithsonian Institution Astrophysical N Observatory CoI: Dr. Dillon Dong Associated Universities, Inc. N CoI: Dr. Peter M. Garnavich University of Notre Dame N ------------------------------------------------------------------------------------ Abstract A recently discovered Galactic nebula appears to be the likely remnant of the historic Galactic guest star of 1181 AD which was a subluminous supernova (SN) outburst. The remnant's striking and unique filamentary morphology, relatively low 1200 km/s expansion velocity, the extraordinary properties of its central star, plus its unusual elemental make-up matches predicted properties of the poorly understood Iax subclass of H-poor thermonuclear supernovae. As one of only five Milky Way supernova reported in the past millennium, we propose WFC3/IR images sensitive to its sulfur and iron emission lines to reveal its subarcsecond structure, compare these line emissions to the dust distribution seen in the mid-infrared, and understand the luminosity history of the central star's 16, 000 km/s wind. These data will provide crucial insights into the nature of Iax supernovae. ------------------------------------------------------------------------------------ Observations Description ------------------------ The goal is to obtain near infrared [S II], [S III], and [Fe II] emission line images of Pa 30 using the WFC3/IR camera that are deeper and of higher resolution than ground-based [S II] images. WFC3/IR offers good filament detections due to its large pixels, less extinction than in the optical (Pa 30: E(B-V ) ~ 0.90 mag), and high throughputs. WFC3/IR also allows the imaging of Pa 30's [Fe II] 12, 570 - 12, 946 Ang emission which is expected to be strong based on spectra of ejecta of other young SNRs (e.g., Cas A, Crab, and Kepler]). Images are to be taken in these two filters centered at four regions using four orbits for each region, thus requring 4 x 4 orbits = 16 orbits done in 12 visits, keeping within the requirment of visits being less than or equal to 3 orbits. Both the F098M and F127M image data would be taken in standard MULTACCUM mode with aperture IR-FIX and SAMPSEQ= SPARS50 or SPARS100and NSAMP=13 requiring two orbits (46.1 minutes each) to execute for each of the four target region of the Pa 30 nebula. The primary dither patten would be a four point 18127( 7) - 13-Feb-2026 13:29:57 - [ 2] WFC3-IR-DITHER-BOX-MIN. This dither patten will recover more than 95% of the detector's bad pixels. Pa 30's filaments are relatively faint with the brighter ones having a measured [S II] 6716, 6731 flux of 2.5 x 10^(-17) erg cm^2 s^-1. Ground-based spectra suggests the [S III] 9531 Ang line is similar in strength to the [S II] 6716 Ang line. Adopting this and the sum of [S II] 10, 290-10, 373 lines equal to the strength of [S III] 9531, the WFC3 ETC yield a S/N of 14 for a 45 minute exposure. This should insure a good detection in two orbits on Pa 30's fainter filaments for each filter even given Pa 30's unknown sub-arcsecond structure. To cover the entire remnant without the "Death Star" defect, we requested and was approved for ORIENT settings to enable a complete mosaic. We have chosen the specific ORIENT of 45, 135, or 225 degrees. ------------------------------------------------------------------------------------ 18127( 7) - 13-Feb-2026 13:29:57 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PA30-NE-A ISM, EJECTA, EMISSION RA=00H53M18.4320S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D30'53.43" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 2 PA30-NE-B ISM, EJECTA, EMISSION RA=00H53M21.7540S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D30'52.74" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 3 PA30-NW-A ISM, EJECTA, EMISSION RA=00H53M3.5020S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D30'53.43" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 4 PA30-NW-B ISM, EJECTA, EMISSION RA=00H53M0.3560S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D30'53.19" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 5 PA30-SE-A ISM, EJECTA, EMISSION RA=00H53M18.4250S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D29'17.80" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 6 PA30-SE-B ISM, EJECTA, EMISSION RA=00H53M21.6300S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D29'17.70" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 7 PA30-SW-A ISM, EJECTA, EMISSION RA=00H53M3.5440S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D29'17.77" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 8 PA30-SW-B ISM, EJECTA, EMISSION RA=00H53M0.3690S, J2000 V = 21 +/- 0.5 LINE NEBULA, SNR DEC=+67D29'17.90" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 18127( 7) - 13-Feb-2026 13:29:57 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-UVIS Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 23.02 Line_Spacing 35.212 Coordinate_Frame POS-TARG Pattern_Orient 0.713 Angle_Between_Sides 89.287 Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 18127( 7) - 13-Feb-2026 13:29:57 - [ 5] Visit: 01 Visit Requirements: ORIENT 224.8D TO 225.3 D 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 PA30-NE-A WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 6] Visit: 02 Visit Requirements: SAME ORIENT AS 01 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 PA30-NE-B WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-NE-B 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-NE-B 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-NE-B 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-NE-B 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 7] Visit: 03 Visit Requirements: SAME ORIENT AS 01 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 PA30-NE-A WFC3/IR MULTIAC IR-FIX F127M NSAMP=13, SAMP-SEQ=SPARS100 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (4811.745 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F127M 1 none none none 1 N/A CUM PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F127M 2 none none none 1 N/A CUM PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F127M 3 none none none 2 N/A CUM PA30-NE-A 1 WFC3/IR MULTIAC IR-FIX F127M 4 none none none 2 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 8] Visit: 04 Visit Requirements: SAME ORIENT AS 01 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 PA30-NW-A WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 9] Visit: 05 Visit Requirements: SAME ORIENT AS 01 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 PA30-NW-B WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-NW-B 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-NW-B 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-NW-B 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-NW-B 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 10] Visit: 06 Visit Requirements: SAME ORIENT AS 01 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 PA30-NW-A WFC3/IR MULTIAC IR-FIX F127M NSAMP=13, SAMP-SEQ=SPARS100 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (4811.745 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F127M 1 none none none 1 N/A CUM PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F127M 2 none none none 1 N/A CUM PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F127M 3 none none none 2 N/A CUM PA30-NW-A 1 WFC3/IR MULTIAC IR-FIX F127M 4 none none none 2 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 11] Visit: 07 Visit Requirements: SAME ORIENT AS 01 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 PA30-SE-A WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 12] Visit: 08 Visit Requirements: SAME ORIENT AS 01 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 PA30-SE-B WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-SE-B 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-SE-B 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-SE-B 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-SE-B 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 13] Visit: 09 Visit Requirements: SAME ORIENT AS 01 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 PA30-SE-A WFC3/IR MULTIAC IR-FIX F127M NSAMP=13, SAMP-SEQ=SPARS100 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (4811.745 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F127M 1 none none none 1 N/A CUM PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F127M 2 none none none 1 N/A CUM PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F127M 3 none none none 2 N/A CUM PA30-SE-A 1 WFC3/IR MULTIAC IR-FIX F127M 4 none none none 2 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 14] Visit: 10 Visit Requirements: SAME ORIENT AS 01 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 PA30-SW-A WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 15] Visit: 11 Visit Requirements: SAME ORIENT AS 01 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 PA30-SW-B WFC3/IR MULTIAC IR-FIX F098M NSAMP=13, SAMP-SEQ=SPARS50 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (2411.751 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-SW-B 1 WFC3/IR MULTIAC IR-FIX F098M 1 none none none 1 N/A CUM PA30-SW-B 1 WFC3/IR MULTIAC IR-FIX F098M 2 none none none 1 N/A CUM PA30-SW-B 1 WFC3/IR MULTIAC IR-FIX F098M 3 none none none 1 N/A CUM PA30-SW-B 1 WFC3/IR MULTIAC IR-FIX F098M 4 none none none 1 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 16] Visit: 12 Visit Requirements: SAME ORIENT AS 01 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 PA30-SW-A WFC3/IR MULTIAC IR-FIX F127M NSAMP=13, SAMP-SEQ=SPARS100 1 DEF GS ACQ SCENARIO ONEB1O3; CUM (4811.745 PATTERN 2 1 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 | ------------------------------------------------------------------------------------------------------------------------------------ PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F127M 1 none none none 1 N/A CUM PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F127M 2 none none none 1 N/A CUM PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F127M 3 none none none 2 N/A CUM PA30-SW-A 1 WFC3/IR MULTIAC IR-FIX F127M 4 none none none 2 N/A CUM 18127( 7) - 13-Feb-2026 13:29:57 - [ 17] Summary Form for Proposal 18127 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, SAMP-SEQ=SPARS100, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO ONEB1O3, ORIENT 224.8D TO 225.3 D, PATTERN 2 1, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F098M, F127M ------------------------------------------------------------------------------------------------------------------------------------ Target Names PA30-NE-A, PA30-NE-B, PA30-NW-A, PA30-NW-B, PA30-SE-A, PA30-SE-B, PA30-SW-A, PA30-SW-B ------------------------------------------------------------------------------------------------------------------------------------