fixed proposal category
hopefully with text!1437541900Assigned ID: 1147
----- Attempting Submission 1 (Mon Jul 13 16:33:27 GMT 2015) -----
HST Phase I Proposal 1147 (slsn.pdf.apt) successfully submitted.
Receipt: # 1147-1
----- Attempting Submission 2 (Mon Jul 13 17:05:04 GMT 2015) -----
HST Phase I Proposal 1147 (slsn.apt) successfully submitted.
Receipt: # 1147-2
----- Attempting Submission 3 (Mon Jul 13 17:16:08 GMT 2015) -----This pattern is not used in this proposal.We have reworked epoch one to be a large number of shorter exposures on a sub-aperture -- based
on DES images there should be no problem with alignment despite the smaller field of view.
The net exposure time is considerably reduced, but there should be no risk of saturation from the transient
while still being plenty of signal to noise for the galaxy -- the second epoch observions have been left unchanged.
Assuming no issues, the first epoch should be released for scheduling.696964156----- Attempting Submission 1 (Tue Jul 21 15:51:55 GMT 2015) -----
HST Phase II Proposal 14346 (slsn.apt) successfully submitted.
Receipt: # 14346-1
----- Attempting Submission 2 (Wed Jul 22 12:30:47 GMT 2015) -----
HST Phase II Proposal 14346 (slsn.apt) successfully submitted.
Receipt: # 14346-2
----- Attempting Submission 3 (Tue Oct 20 17:33:24 GMT 2015) -----
HST Phase II Proposal 14346 (slsn.apt) successfully submitted.
Receipt: # 14346-3
----- Attempting Submission 4 (Fri Dec 18 18:27:01 GMT 2015) -----an unused dither was not deletedConstraining the Position of the Most Luminous Supernova Ever FoundbIn ASASSN-15lh we appear to have found the most superluminous
supernova discovered to date, with a peak luminosity in excess
of 10^45 ergs/s. It is an SLSN-I with no hydrogen or helium
emission -- its only spectral feature is an absorption trough
attributed to OII. While its properties match other SLSN-I
and do not match any known AGN, including known tidal
disruption events, its position is very close to the core
of its host galaxy. We propose HST observations to measure
or constrain the offset down to scales under 10~pc. DD time
is required because the transient will not be present by
the time any Cycle 24 observations are scheduled.We will obtain two WFC3/UVIS F606W images of the target. One while the transient is present
but neither too bright nor too faint, one one when the transient is gone. The estimated time
frames are October/November 2015 for the first and February 2016 or later for the second.
Each visit will be done using six position sub-pixel dithers to control for cosmic rays/hot pixels
and produce a clean, sub-sampled PSF.
****READ CAREFULLY FOR EPOCH1 ****
We have updated the slope of the light curve, and also note that it closely
matches the decay rate of another SLSN-I, iPTF13ajg, which seems to have maintained this
slope out to the time scales needed for these observations.
Following a discussion with Alison Vick, the exposure times for epoch 1 were reduced by 15-20% over
the maximum possible, which opened up the scheduling window to cover Sept 1 to
November 30 rather than the orginal windows of Sept 7-26 and Oct 31-Nov 19. The
reduction in the S/N of the observations should have no significant impact on the results
The **ESTIMATED** magnitude of the transient is
Sept 1 19.1
Oct 1 19.9
Nov 1 20.8
Dec 1 21.6
so I have set the timing constraint to be the month of October -- in September it
is too bright and as we reduce the exposure times there will be fewer background sources
(to ensure good registration to epoch #2) and in November it is getting too faint (and the reliability of these
estimates is increasingly dubious). Should more scheduling flexibility be needed, please
contact me and we can try to adjust the strategy.
***END READ CAREFULLY FOR EPOCH2 ****
The extrapolated magnitude is predicted to be faint enough for the 2nd observation
in February 2016 or later, as included in the proposal. However, if you want to
schedule it early in this period, we should use the results of the first epoch (and
other monitoring data) to verify that the extrapolation remains valid. Since there
was no reason not to simply use windows that maximize the total integration time,
"auto-adjust" was used to optimize the exposure times.
***now back to just description of process*****
Difference imaging methods will then be used to remove the host from the epoch with the
transient and ensure proper alignment of the two epochs, and then we will measure the
relative positions of the transient and the galaxy core to determine the offset.HOT STARS0SUPPORTEDEXT-STARACCRETION DISKBULGESUPERNOVAJ2000J2000WFC3/UVISImagingNoNoF606WWFC3/UVISImagingNoNoF606WPOS-TARGDITHER0.173LINE0.112falsefalse81.785423.884WFC3-UVIS-DITHER-BOX1falsePOS-TARGDITHER0.145LINEfalsefalse346.84WFC3-UVIS-DITHER-LINE2falsePOS-TARGDITHER0.145LINEfalsefalse246.84WFC3-UVIS-DITHER-LINE3falseThe scheduling data was generated by CASM 23.2.CASM was run in Phase II mode./tmp/OPVisit6783066165339668197.xml(Tic-Visit
:proposal-id 14346
:visit-id "04"
:proposal-version -1
:trans-version "20150609"
:date "18-Dec-2015 09:51:51.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 348176
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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(Tic-Orbit
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:orbit-number 1
:pcs-time 333
:si-vis-utilization 3129
:al-overhead-at-end 85
:internal-dur-at-end 417
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3478
:pcs-gap 0
)true10The scheduling data was generated by CASM 23.2.CASM was run in Phase II mode./tmp/OPVisit7379449563119429749.xml(Tic-Visit
:proposal-id 14346
:visit-id "02"
:proposal-version -1
:trans-version "20150609"
:date "18-Dec-2015 09:33:49.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 1732496
:tdrss-contact-duration 0
:coron NIL
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(Tic-Obset
:proposal-id 14346
:visit-id "02"
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:pcs-mode "FGS"
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(Tic-Orbit
:proposal-id 14346
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3144
:al-overhead-at-end 116
:internal-dur-at-end 668
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
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:pcs-gap 0
)true10