0
Assigned ID: 5984
----- Attempting Submission 1 (Thu Nov 07 19:56:39 GMT 2024) -----
HST Phase I Proposal 5984 successfully submitted.
Receipt: # 5984-1
----- Attempting Submission 2 (Thu Nov 07 22:37:33 GMT 2024) -----
HST Phase I Proposal 5984 successfully submitted.
Receipt: # 5984-2
----- Attempting Submission 3 (Thu Nov 07 22:39:48 GMT 2024) -----
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
POS TARG & PATTERN should be used carefully with ACS ramp filters as central wavelengths & transmission efficiencies vary within the apertures.
0
----- Attempting Submission 1 (Thu Jan 30 18:20:14 GMT 2025) -----
These warnings refer to using POS-TARGs and PATTERNs with ramp filters.
I have checked that the final object positions are correct (using Aladin and Target Confirmation).
A Complete Sample of Ionization Echoes Around Fading AGN
Understanding how and why Active Galactic Nuclei (AGN) vary in ionizing output can provide insight into the physics of AGN accretion and fueling. "Green Bean" nebulae at z~0.3, discovered using a uniform color selection, were found to host powerful AGN that have ramped down in ionizing output by 3-4 orders of magnitude over the past 10,000-100,000 years; this significant variability should be imprinted as an ionization echo within the surrounding extended emission line gas. Leveraging a successful recombination balance approach demonstrated previously for a sample of lower redshift Seyfert-class systems, an approved Cycle 32 program is targeting a limited subset of 6 Green Beans. In this proposal, we propose to obtain the crucial HST ACS ramp filter Halpha imaging for the remaining 11 Green Bean nebulae in order to constrain the ionization histories of luminous AGN at high spatial, and therefore time, resolution across the complete sample. This proposal is eligible for the Cycle 32 Bridge call because the ACS ramp filters are the only option for obtaining high resolution narrowband Halpha imaging at these redshifts.
We propose to obtain HST ACS ramp filter imaging of redshifted Halpha for 11 "Green Bean" nebulae at z~0.3 in order to map out the ionization histories of these luminous Active Galactic Nuclei (AGN) at high spatial, and therefore time, resolution.
~~ACS Ramp Filter Imaging~~
Filters --
Our targets are at z~0.192-0.334. We will use ramp filter FR853N in ten cases and FR782N in one case, with central wavelengths set to match redshifted Halpha for each target, i.e., central wavelengths of 7823-8755A.
Aperture --
For FR853N, we will use the default WFC1-IRAMP aperture.
For FR782N, we will use the default WFC2-ORAMP aperture.
Dither Pattern --
We do not need to dither over the chip gap. To minimize CTE issues, we will prioritize longer exposure times and use the default 4-point ACS-WFC-DITHER-BOX dither pattern. This will allow us to improve the sampling of the point spread function and help address image artifacts and cosmic rays.
Exposure times -- Exposure times are auto-adjusted to maxmize on-target exposure during each orbit.
Audrey Dijeau is a PhD student working on simulating low redshift emission line nebulae and identifying larger samples using ground-based imaging surveys.
William Keel has extensive experience in analyzing imaging of extended emission regions around AGN, including HST ACS ramp filter data. Some results have appeared in MNRAS 420, 878 (2012); AJ 144, 66 (2012); ApJ 835, 256 (2017); and MNRAS 438, 4847 (2019).
Moire Prescott has prior experience working with HST WFC3 and ACS broadband and ramp filter imaging on high redshift Lya nebulae (Prescott et al, 2012, ApJ, 752, 86) and with ground-based multiwavelength broadband/narrowband imaging and longslit/IFU spectroscopy, data that will be used to complement the proposed HST dataset.
Kelly Sanderson is a PhD student studying low and high redshift emission line nebulae. She has expertise in working with ground-based IFU observations and radio observations, data that will be used to complement the proposed HST dataset.
Supermassive Black Holes and Active Galaxies
Intergalactic Medium and the Circumgalactic Medium
6
false
false
false
false
false
false
false
SUPPORTED
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.3
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.2
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=19.1
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.9
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=19.0
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.5
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.7
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.6
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=19.2
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=18.9
GALAXY
EMISSION LINE NEBULA
SEYFERT
YES
J2000
J2000
SDSSr=19.1
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR782N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
ACS/WFC
RampFilter
No
No
FR853N
POS-TARG
DITHER
0.2637
LINE
0.1856
false
false
69.02
4
20.7
ACS-WFC-DITHER-BOX
1
false
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1757425177000
270.02305884594693
(Tic-Visit
:proposal-id 17930
:visit-id "01"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:12.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "01"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2630
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3010
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "01"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2630
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3010
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1752095127000
244.49971584967574
(Tic-Visit
:proposal-id 17930
:visit-id "02"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:13.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "02"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2654
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3034
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "02"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2654
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3034
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1752016108000
249.15590137861324
(Tic-Visit
:proposal-id 17930
:visit-id "03"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:13.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "03"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2648
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3028
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "03"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2648
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3028
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1760094995000
215.90511145980474
(Tic-Visit
:proposal-id 17930
:visit-id "04"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:15.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "04"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2648
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3032
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "04"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2648
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3032
:pcs-gap 0
)
true
2
0
/System/Volumes/Data/solaris/user1/sherwin/17930/OP-cache/17930-v12.xml
HOPR copy of visit 04, orbit2 only
(Tic-Visit
:proposal-id 17930
:visit-id "12"
:proposal-version -1
:trans-version "20250929"
:date "09-Jan-2026 13:01:50.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 568448
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "12"
:obset-id "12"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "12"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2602
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2983
:pcs-gap 0
)
true
1
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1745277348000
202.0
(Tic-Visit
:proposal-id 17930
:visit-id "05"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:16.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "05"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2630
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3010
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "05"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2630
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3010
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 17930
:visit-id "06"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:17.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "06"
:obset-id "06"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "06"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2652
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3032
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "06"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2652
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3032
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 17930
:visit-id "07"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:18.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "07"
:obset-id "07"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "07"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2654
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3034
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "07"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2654
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3034
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1751811414000
221.93169702992674
(Tic-Visit
:proposal-id 17930
:visit-id "08"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:19.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "08"
:obset-id "08"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "08"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2630
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3010
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "08"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2630
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3010
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
1750277882000
244.31257936871606
(Tic-Visit
:proposal-id 17930
:visit-id "09"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:21.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "09"
:obset-id "09"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "09"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2624
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3005
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "09"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2624
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3005
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 17930
:visit-id "10"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:22.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "10"
:obset-id "10"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "10"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2648
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3028
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "10"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2648
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3028
:pcs-gap 0
)
true
2
0
The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 17930
:visit-id "11"
:proposal-version -1
:trans-version "20241217"
:date "30-Jan-2025 10:49:23.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 1136896
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17930
:visit-id "11"
:obset-id "11"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17930
:visit-id "11"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2654
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3034
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17930
:visit-id "11"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2654
:al-overhead-at-end 0
:internal-dur-at-end 347
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3034
:pcs-gap 0
)
true
2
0