Updated proprietary time requested in proposal text to 6 months.1279779245Assigned ID: 5943
----- Attempting Submission 1 (Fri Oct 25 14:57:46 GMT 2024) -----
HST Phase I Proposal 5943 successfully submitted.
Receipt: # 5943-1
----- Attempting Submission 2 (Fri Oct 25 16:02:36 GMT 2024) -----
HST Phase I Proposal 5943 successfully submitted.
Receipt: # 5943-2
----- Attempting Submission 3 (Fri Oct 25 16:16:32 GMT 2024) -----Visit 01 partially failed in March 2025 with an orientation of 294 deg. This resubmission is a TTRB-approved repeat of only orbits 2 and 3. We can get roughly the same field with a rotation of 90-93 degrees (orient 201 deg) in July 2025. In addition to some standard y-shift gap dithers, we include some nonstandard x-shifts to better match the footprint of the existing data from visit 01. -- Max Mutchler866192----- Attempting Submission 1 (Thu Oct 31 13:32:43 GMT 2024) -----
----- Attempting Submission 2 (Thu Jan 02 17:01:23 GMT 2025) -----
Your proposal could not be saved.
Submission aborted.
----- Attempting Submission 3 (Tue Jan 28 15:46:59 GMT 2025) -----
----- Attempting Submission 4 (Fri Apr 04 20:52:51 GMT 2025) -----Narrowband Imaging of NGC 6888We propose to take deep narrowband imaging of the Wolf-Rayet nebula NGC 6888. Deep H-alpha, [N II], and [OIII] images in F656N, F658N, and F502N will sample different density and temperature regions within the nebula.We will obtain high signal-to-noise imaging of NGC 6888, the Crescent Nebula, in narrow-band filters F502N, F656N, and F658N as well as short bookend exposures in broadband filters F475W and F814W to provide color balance on the stars in the field. We propose a single WFC3 pointing which will cover a bright portion on the edge of the larger nebula. In the event of needing to retake a failed visit, we will attempt to match the Position Angle; in the event that this is not possible to schedule in Reduced Gyro Mode, we will make due with reduced dithers and use archival WFPC2 data to boost signal-to-noise if necessary. We will also employ a dither pattern which fills the chip gaps and enables cosmic ray rejection. The full nebula extends over a diameter of 20 arcmin, so we will focus on a particularly bright and turbulent edge of the nebula. Based on archival WFPC2 data, we estimate that high signal-to-noise images will require 2 orbits of F502N, 1 orbit of F656N, and 1 orbit of F658N, totalling 4 orbits. Most of the color composite will derive from the contrasting physical conditions promoting emission in [O III], [N II], and H-alpha. With exposure times calculated from existing archival WFPC2 observations, we can achieve the signal-to-noise desired with 4 orbits.
Following a partial failure of Visit 01:
After review, the Telescope Time Review Board (TTRB) approves your request and awards two orbits to repeat orbit #2 and #3 in Visit 01, which suffered failed guide-star reacquisition and loss of lock anomalies, leading to degraded data. The TTRB also approves your request to execute the repeats at the same ORIENT as the successful observations from Visit 01 or at 90 degrees offset from it.
Visit 01 executed at an orientation of 294 deg in March 2025, and repeat visit 02 will execute at 201 deg in July 2025. Where get get two exposures of the same filter in visit 02, we include a standard y-shift gap dither and also a nonstandard x-shift which helps the repeat better match the footprint of the existing data from visit 01.The team has a wealth of experience in making outreach images for the Hubble Space Telescope and is responsible for creating Hubble images viewed by billions of people world-wide, includingthe 31st, 32nd, 33rd, and 34th anniversary images which together were viewed over 3 billion times. The team includes decades of experience in writing Hubble news releases, designing informal educational and outreach products based on Hubble data, as well as instrument expertise specializing in treatment of WFC3 data.Stellar Physics and Stellar Types6falseSUPPORTEDISMEMISSION LINE NEBULAYESThis object was generated by the targetselector and retrieved from the SIMBAD database.J2000J2000WFC3/UVISImagingNoNoF502NWFC3/UVISImagingNoNoF656NWFC3/UVISImagingNoNoF658NWFC3/UVISImagingNoNoF475WWFC3/UVISImagingNoNoF814WWFC3/UVISImagingNoNoF555WPOS-TARGDITHER10LINEfalsefalse289LINE1falsePOS-TARGDITHER5LINEfalsefalse389LINE2false/Users/mutchler/Desktop/APT/17882_ngc6888/OP-cache/17882_ngc6888_repeat-v01.xmlThe scheduling data was generated by CASM 33.0.CASM was run in Phase II mode.1742333687000293.955026735973(Tic-Visit
:proposal-id 17882
:visit-id "01"
:proposal-version -1
:trans-version "20241216"
:date "04-Apr-2025 15:32:03.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 4
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4042416
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17882
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17882
:visit-id "01"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2622
:al-overhead-at-end 99
:internal-dur-at-end 668
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3039
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17882
:visit-id "01"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2622
:al-overhead-at-end 99
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3039
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17882
:visit-id "01"
:orbit-number 3
:pcs-time 380
:si-vis-utilization 2632
:al-overhead-at-end 127
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3039
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17882
:visit-id "01"
:orbit-number 4
:pcs-time 380
:si-vis-utilization 2532
:al-overhead-at-end 127
:internal-dur-at-end 668
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3039
:pcs-gap 0
)true40The scheduling data was generated by CASM 33.0.CASM was run in Phase II mode./private/var/folders/tj/27ygn_756lz3w1z19s6wtgtm0006vh/T/OPVisit3381671438917134856.xml(Tic-Visit
:proposal-id 17882
:visit-id "02"
:proposal-version -1
:trans-version "20241216"
:date "04-Apr-2025 16:32:20.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 2021216
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 17882
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 17882
:visit-id "02"
:orbit-number 1
:pcs-time 380
:si-vis-utilization 2592
:al-overhead-at-end 129
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3039
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 17882
:visit-id "02"
:orbit-number 2
:pcs-time 380
:si-vis-utilization 2632
:al-overhead-at-end 127
:internal-dur-at-end 352
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3039
:pcs-gap 0
)true20