----- Attempting Submission 3 (Thu Nov 11 21:24:22 GMT 2010) -----
----- Attempting Submission 4 (Wed Dec 01 15:20:59 GMT 2010) -----
----- Attempting Submission 5 (Mon Dec 13 22:41:30 GMT 2010) -----UV Studies of a Core Collapse SupernovaThe UV spectrum of a core collapse SN encodes unique information
about nucleosynthesis, the star's mass loss history, shock physics,
and dust formation. This proposal aims at a detailed study of one
bright core collapse SN, discoved as a result of the many ongoing
surveys, either a Type IIP, IIn or Ib or Ic supernova. We will address
the role of circumstellar interaction and mass loss through CNO lines
in the UV, the nature of dust formation from UV line profiles, and we
will use the UV continuum as a diagnostic of non-thermal emission
from the shock. The overall goal is to achieve a better understanding
of these objects by combining ground-based observations with
complementary HST data. We have used HST to obtain critical UV spectra
from the explosion to the nebular phase with good results for a limited
number of objects. The advent of COS provides new capability for UV
observations which we would like to exploit. Over the past decade, we
have conducted studies of a small number of nearby SN with HST,
and we have published an extensive series of papers. When nature provides
a bright candidate, HST should be ready to respond. We are ready to run
that program.We have developed a very effective set of
observations which have worked well for SN~1992A (SN~Ia) , SN~1993J
(SN~IIb), SN~1994I (SN~Ic), SN~1998S (SN~IIn), SN~1999em (SN~II),
SN~2001ig
(SN~IIb), and SN~2002ap (SN~Ic),
to gather unique spectra in the UV with HST. We propose 10
orbits of observations spread over 4 epochs, the first at the earliest
the HST system
will allow, the second 1-4 weeks later, a third that follows in 2-4
weeks, and a final observation at age 2-6 months.
The observing technique will be different for each type of supernova,
which we will determine from optical spectra taken at our own CfA
facilities, or from spectra taken by others.
For Type IIn or IIP (or Ib or Ic that show circumstellar interaction):
The first visit will use only the CCD on STIS to ensure it is safe to
use more delicate detectors. STIS/CCD/G230LB (1.6 orbits) and
STIS/CCD/G430L (0.4) will be used to obtain the near UV and optical
spectra.
After we measure the UV flux in G230LB, an accurate estimate of the
FAR UV
$<$ 1700A can be determined. We have prepared a number of safe visits
with COS,
with either COS/G140L or COS/G130M and COS/G160M, each tailored for a
specific UV
flux.
We expect the 2nd, 3rd, and 4th epochs will be use COS, which has
exceptional performance for point sources like supernovae.
We expect a scheduling pause will occur between obtaining
the first epoch observations with STIS/CCD, which measure the UV flux,
then scheduling the appropriate safe COS visits.
We request 2 orbits for first visit, and 2 orbits for second, and 3
orbits for visits 3 and 4.
The spectra in the figures show the quality
of the HST UV Spectra: our main concern is avoid an object that is
too bright.
We have used the ETC to create a series of visits, using SN 1998S
spectra as a guide for possible COS visits.
For example: Using the day 27 spectrum of SN~1998S
(which was about 14 mag in B) we obtain a $S/N$ of 20 in 1 orbit with G140L (COS.A278919).
and using the day 70 SN 1998S spectrum, we obtain $S/N 10$ in about 2 orbits (COS.A278923).
For Type Ib, Ic or IIb (that show no circumstellar interaction):
We propose to use STIS G230LB and G430L for the first visit.
Again, we expect a scheduling pause after obtaining
the first epoch observations with STIS/CCD, measuring the UV flux, to
schedule
the appropriate safe follow up visits, with either COS or STIS.
We request the same allocation of 2 orbits for first visit, and 2
orbits for second, and 3 orbits for visits 3 and 4.
As an example: Using the day 6 spectrum of SN~1999em, the ETC indicates
one orbit of exposure yields a $S/N$ of about 10 (COS.A278934).HOT STARS12false0.00.0falsefalsefalsefalsefalsefalseSUPPORTEDEXT-STARSUPERNOVASUPERNOVA TYPE IIJ200000 00 0.0000+00 00 0.00J2000EXT-STARSUPERNOVASUPERNOVA TYPE IIJ200000 00 0.0000+00 00 0.00J2000STIS/CCDSpectroscopicNoNoG230LB2375STIS/CCDSpectroscopicNoNoG430L4300COS/FUVSpectroscopicNoNoG140L1280COS/FUVSpectroscopicNoNoG130M1309COS/FUVSpectroscopicNoNoG160M1600COS/FUVSpectroscopicNoNoG140L1280COS/FUVSpectroscopicNoNoG130M1309COS/FUVSpectroscopicNoNoG160M1600STIS/FUV-MAMASpectroscopicNoNoG140L1425STIS/NUV-MAMASpectroscopicNoNoG230L2376STIS/CCDSpectroscopicNoNoG430L4300Timing link suitability includes constraints ([02 After 01 by 10.0 to 14.0 days] [04 After 01 by 30.0 to 50.0 days])The scheduling data was generated by CASM 18.3.1.CASM was run in Phase II mode.ToO
Acquisition time is correct for snUGC5189A @ mag 13.01289508241000288.8408981305174(Tic-Visit
:proposal-id 12242
:visit-id "01"
:proposal-version -1
:trans-version "20100505"
:date "05-Nov-2010 09:32:34.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "24"
:si-bright-earth-limb-angle 20.0
:data-volume 239664
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12242
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12242
:visit-id "01"
:orbit-number 1
:pcs-time 333
: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 3021
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12242
:visit-id "01"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2782
:al-overhead-at-end 0
:internal-dur-at-end 342
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3021
:pcs-gap 0
)false20ToOAcq for bright supernova v=13.0Timing link suitability includes constraints ([Sequence (02 03) within 1.0 days] [02 After 01 by 10.0 to 14.0 days])The scheduling data was generated by CASM 18.3.1.CASM was run in Phase II mode.Acqusition time is set for mag 13.51290388086000289.5676560512504(Tic-Visit
:proposal-id 12242
:visit-id "02"
:proposal-version -1
:trans-version "20100505"
:date "05-Nov-2010 09:32:50.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
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:data-volume 239664
:tdrss-contact-duration 0
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(Tic-Obset
:proposal-id 12242
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12242
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2680
: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 3021
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12242
:visit-id "02"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2782
:al-overhead-at-end 0
:internal-dur-at-end 342
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3021
:pcs-gap 0
)false20ToOAcq for bright supernova v=13Timing link suitability includes constraints ([Sequence (02 03) within 1.0 days])The scheduling data was generated by CASM 18.3.1.CASM was run in Phase II mode.exposure time is set for mag 14 BB 7000
Mirror B + PSA = 60 seconds1290399377000286.0471966477726(Tic-Visit
:proposal-id 12242
:visit-id "03"
:proposal-version -1
:trans-version "20100902"
:date "11-Nov-2010 16:20:17.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "31"
:si-bright-earth-limb-angle 20.0
:data-volume 208864
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12242
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12242
:visit-id "03"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2653
:al-overhead-at-end 0
:internal-dur-at-end 362
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3021
:pcs-gap 0
)false10ToOFor a bright supernova v = 13, BB 7250,A372522Timing link suitability includes constraints ([Sequence (04 05) within 1.0 days])The scheduling data was generated by CASM 18.3.1.CASM was run in Phase II mode./tmp/OPVisit63596.xml53(Tic-Visit
:proposal-id 12242
:visit-id "04"
:proposal-version -1
:trans-version "20100505"
:date "13-Dec-2010 17:40:46.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 3
:saa-model "24"
:si-bright-earth-limb-angle 20.0
:data-volume 368480
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12242
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12242
:visit-id "04"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2806
: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 3242
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12242
:visit-id "04"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2957
: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 3242
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12242
:visit-id "04"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2954
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:internal-dur-at-end 421
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3242
:pcs-gap 0
)true30ToOAcq for bright supernova v=14.5Timing link suitability includes constraints ([Sequence (04 05) within 1.0 days])The scheduling data was generated by CASM 18.3.1.CASM was run in Phase II mode./tmp/OPVisit63595.xmlUsing the light curve. the supenova should be U = 15.4 on Jan 31st.
the supernova is currently fading @ 0.013 mags/day
Coordinate should be known to 0.1"., so ACQ/IMAGE should be fine.
Buffer times are set to expsoure time - 110s as recommended by COS team.(Tic-Visit
:proposal-id 12242
:visit-id "05"
:proposal-version -1
:trans-version "20100505"
:date "13-Dec-2010 17:36:36.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "31"
:si-bright-earth-limb-angle 20.0
:data-volume 191488
:tdrss-contact-duration 0
:coron NIL
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(Tic-Obset
:proposal-id 12242
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12242
:visit-id "05"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2865
:al-overhead-at-end 0
:internal-dur-at-end 40
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3242
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12242
:visit-id "05"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3014
:al-overhead-at-end 0
:internal-dur-at-end 352
:dark-offset NIL
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:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3242
:pcs-gap 0
)true20ToOI use the previous HST/STIS spectrum with the estimates brightness
from the light curve Jan 30 the U mag will be about 15.4 COS.ta.000840