Science Keywords: Select from 2 to 5 items.
Science Keywords is a required field.0Assigned ID: 1503
----- Attempting Submission 1 (Fri Aug 11 17:01:02 GMT 2017) -----Joint Chandra/HST Proposal loadsEphemeris Center: HUBBLE is recommended only when observing a target closer than 3.8 million kilometers. If the target is farther than that, Ephemeris Center: EARTH is recommended.
Ephemeris Center: HUBBLE is recommended only when observing a target closer than 3.8 million kilometers. If the target is farther than that, Ephemeris Center: EARTH is recommended.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.
POS TARG & PATTERN should be used carefully with WFC3 quad filters to avoid placing the target on the vignetted part of the field of view or moving it to another quadrant.1. Updated level 1 orbital elements for targets (both copies)
2. Added Visits 81-84 and 91-94, corresponding to the original Visit 11-14 and 21-24.
3. The changes in newly added visits compared to the corresponding original ones are:
3.1 Shortened all 245 s exposures through FQ387N to 90 to 105 s.
3.2 Added one single 370 s exposure through FQ387N in the middle of each visit to allow for memory dump
added the extended GS acq, put in alignement structure for 81-94 of 4, 6, 8 start new alignments.
cut time in visits 11-24, 15s per long exposure to accomodate the new gs acq.
cut 5-10s per long exposure in 81-94 to accomodate the new gs acq.
We will see if this fits. It may need to be shorter.
Try cutting an additional 5s from 21-24
cut 100s exposures to 90s in visits 81-94. changed alignment stucture, 81-94
removed pos targs on exposure 6
cut 90s exposures to 85s in 81-84
linkset wrong on 84 and 94, set to days not orbits.
Orbital elements update to JPL solution K182/10.
Orbital elements for target 2 updated to JPL solution K181/3
HOPR visits 95-98. copies of 91-94 (these will be the replacements for 81-84).
target 03 made for these visits. If ephem updated, target 03 is the one to update. This one is not using ground based parallax.
changed between on visit 95
fixed links
Update orbital elements for Target 3 to JPL K181/8-651234558----- Attempting Submission 1 (Thu Sep 14 14:38:56 GMT 2017) -----
----- Attempting Submission 2 (Mon Aug 27 16:31:54 GMT 2018) -----
----- Attempting Submission 3 (Tue Oct 09 17:50:50 GMT 2018) -----
----- Attempting Submission 4 (Mon Oct 15 13:08:49 GMT 2018) -----
----- Attempting Submission 5 (Tue Oct 16 16:51:37 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-5
----- Attempting Submission 6 (Tue Oct 16 17:05:22 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-6
----- Attempting Submission 7 (Tue Oct 16 17:30:11 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-7
----- Attempting Submission 8 (Tue Oct 16 17:39:30 GMT 2018) -----
----- Attempting Submission 9 (Mon Nov 05 13:59:03 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-9
----- Attempting Submission 10 (Mon Nov 05 14:26:47 GMT 2018) -----
----- Attempting Submission 11 (Mon Nov 05 14:47:48 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-11
----- Attempting Submission 12 (Mon Nov 05 15:09:09 GMT 2018) -----
----- Attempting Submission 13 (Wed Nov 07 14:44:03 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-13
----- Attempting Submission 14 (Wed Nov 07 14:55:43 GMT 2018) -----
----- Attempting Submission 16 (Fri Nov 09 16:41:40 GMT 2018) -----
----- Attempting Submission 17 (Fri Nov 09 17:41:46 GMT 2018) -----
HST Phase II Proposal 15372 (15372-try2.apt) successfully submitted.
Receipt: # 15372-17
----- Attempting Submission 18 (Fri Nov 09 18:11:48 GMT 2018) -----
HST Phase II Proposal 15372 (15372-try2.apt) successfully submitted.
Receipt: # 15372-18
----- Attempting Submission 19 (Fri Nov 09 19:00:03 GMT 2018) -----
HST Phase II Proposal 15372 (15372-try2.apt) successfully submitted.
Receipt: # 15372-19
----- Attempting Submission 20 (Fri Nov 09 19:24:35 GMT 2018) -----
----- Attempting Submission 21 (Sun Nov 11 16:29:22 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-21
----- Attempting Submission 22 (Sun Nov 11 17:09:07 GMT 2018) -----
Your proposal could not be saved.
Submission aborted.
----- Attempting Submission 23 (Mon Nov 12 12:47:12 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-23
----- Attempting Submission 24 (Mon Nov 12 13:04:21 GMT 2018) -----
----- Attempting Submission 25 (Thu Nov 15 20:54:40 GMT 2018) -----
Your proposal could not be saved.
Submission aborted.
----- Attempting Submission 26 (Fri Nov 16 19:14:00 GMT 2018) -----
----- Attempting Submission 27 (Mon Nov 26 22:31:33 GMT 2018) -----
----- Attempting Submission 28 (Mon Dec 10 17:04:45 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-28
----- Attempting Submission 29 (Mon Dec 10 17:12:12 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-29
----- Attempting Submission 30 (Mon Dec 10 17:23:44 GMT 2018) -----
HST Phase II Proposal 15372 (15372.apt) successfully submitted.
Receipt: # 15372-30
----- Attempting Submission 31 (Mon Dec 10 17:29:53 GMT 2018) -----
----- Attempting Submission 32 (Tue Dec 11 02:27:46 GMT 2018) -----our object is a moving solar system object and we will address those flags with the STSCI staffClose encounter with comet 46P/Wirtanen: X-ray tomography of the comaWe request simultaneous observations with Chandra/ACIS and HST/WFC3 to characterize the neutral gas and plasma around comet 46P/Wirtanen. We will use the comet s historic close approach to Earth as a natural laboratory to study charge exchange emission processes. First, we will combine x-ray and visible imaging to map the distribution and variability of gas in the coma. Second, the comet's close proximity allows us to investigate the emission mechanism responsible for faint >1 keV features previously seen in other comets. Third, we will compare the interactions of the solar wind with the gas molecules surrounding the comet and with local interstellar neutral atoms sweeping through the heliosphere.The HST observations are separated into two epochs, corresponding to the two epochs of Chandra observations. The first epoch is between December 1 and 5, 2018, and the second epoch is between December 13 and 14, 2018. Each epoch contains four orbits, to be executed consecutively.
The preliminary exposure time calculation for 46P is based on the images of Comet C/2013 A1 (Siding Spring) through the same filters (GO-13675 and GO-13934) and the brightness prediction from JPL Horizons for both comets. For C/2013 A1, the peak count rates for F689M, F845M, and FQ387N are 56, 35, and 0.3 DN/s, respectively. Scaling these rates to the conditions of comet 46P requires multiplying by a factor of 9 for December 3, and a factor of 18 for December 13 based on JPL/Horizons. Therefore, the precicted peak count rates for 46P are 300-600, 500-1000, and 2.7-5.4 DN/s in F689M, F845M, and FQ387N filters, respectively. For an exposure level of 10,000 DN (UVIS saturates at ~64,000 DN), the nominal exposure tiems are 20, 33, 3700 s for December 3, and 10, 16, and 3700 s for December 13 through the three filters F689M, F845M, and FQ387N. Since the nominal exposure time for FQ387N is too long, we break it into pairs of shorter exposures to be bracketed by the medium band filter exposures to allow for continuum removal and to facilitate cosmic ray removal. The FQ387N exposure time we used here is 275 and 290 s. For all exposures, we plan to use 2k-by-2k subframes at the same UVIS chip (UVIS1) as the FQ387N quad filter to save overhead from readout and repointing the telescope, and avoid filling up the camera memory during the target visibility.
For each orbit, we take two sets of back-to-back FQ387N exposures, bracketed by the two medium band filter exposures for continuum removal. A small dither of 0.5" in both x and y detector directions is inserted in the middle of each orbit to mitigate bad pixels and bad columns on the detector.
Comets are notoriously hard to predict. As with all other cometary observations by HST, this is a preliminary observing plan, and will be updated near the actual observations based on the new information of the comet collected as well as the schedule of Chandra observations. The update will include target ephemeris, exposure time, and subframe setting (based on new ephemeris uncertainty). We will work closely with our PC and CS to schedule the observations as close in time as the Chandra observations, ideally simultaneously.Solar System6falsefalsefalsefalsefalsefalsefalseSUPPORTEDSOLAR SYSTEMYESCOMETComet 46P/WirtanenTYPE=COMET,Q=1.055358155660378,E=0.6586722871766302,I=11.7468657252554
,O=82.1584356714464,W=356.3353638179405,T=12-DEC-2018:22:14:54,TTimeScale=TDB,EQUINOX=J2000,EPOCH=03-DEC-2018:00:00:00,EpochTimeScale=TDB,A1=3.318435549736E-9,A2=-1.256386339664E-9,A3=0.HUBBLESOLAR SYSTEMYESCOMETComet 46P/WirtanenTYPE=COMET,Q=1.055351216826601,E=0.6587666506584203,I=11.74779039480346
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