0Assigned ID: 873
----- Attempting Submission 1 (Fri Apr 11 21:32:50 GMT 2014) -----FLASH = 9 added to F438W and F665N exposures of visits 4 and 5 to combat CTE.-318008203----- Attempting Submission 1 (Tue Jul 22 12:50:10 GMT 2014) -----
HST Phase II Proposal 13698 (carich_HST22_phaseII.apt) successfully submitted.
----- Attempting Submission 2 (Thu Aug 21 06:36:53 GMT 2014) -----
----- Attempting Submission 3 (Tue Sep 23 13:39:57 GMT 2014) -----Technical problems relating to running orbit planner have been encountered and consequently the visit planner has not been able to be run either.The environments and progenitors of calcium-rich transientsCalcium-rich transients represent a new, peculiar class of extra-galactic explosion in which up to half the ejecta is calcium. Exhibiting peak luminosities in the gap between novae and supernovae, and fast evolving light curves, they present a challenge for both observation and theory. Their host galaxy locations prove a problem for most proposed progenitor systems as they are preferentially located at extreme offsets from their putative hosts, and no underlying stellar population has yet been detected in these cases.
In this proposal we will either detect for the first time, or conclusively rule out, underlying systems at the locations of a sample of these extreme-offset transients through very deep imaging provided by HST. Alongside this, we will characterise the underlying stellar population of examples of the class which appear, in projection, to be within the disks of their hosts. From these observations we will ascertain if Ca-rich transients are born in-situ or kicked from their birth sites at high velocity. Either scenario is of significant interest. If born in situ then there must be unusual chemical evolution properties in the exceptionally low mass systems in which they reside, which produce such unusual transients. In contrast if they are kicked then binary mergers (e.g. white dwarf -- neutron star) would become favoured systems, making these events powerful tools for constraining the evolution in creating tight binaries, and with important implications for gravitational wave searches.We will obtain deep broadband imaging data over the course of 6 orbits in order to
probe sufficient depths at the locations of 3 local Ca-rich transients that appear to have no
underlying systems in shallower imaging, labelled SNe 2003dr, 2005E and 2007ke. Imaging
will be done using the ACS/WFC in filters F435W and F606W to give us good overall
sensitivity, and specifically sensitivity to young stellar populations. Accounting for visibility
and guide star and instrumental overheads respectively, with three frames per orbit, the
HST ETC was used to estimate limiting magnitudes of mF435W = 28 and mF606W = 28.3. A
F435W-F606W colour will be useful should we detect anything, however we can also combine
both images to attempt to discover extremely faint sources of flux.
Additionally, we wish to characterise the stellar populations of two other proximate
members, SNe 2001co and 2003dg, which are coincident with their hosts' stellar disks (there-
fore such deep imaging is not required to observe the underlying population) over 4 orbits.
For each, we will use the ACS/WFC to observe Halpha with FR656N (at central wavelength around 6680A) to a
depth of 24.5 mag over one orbit (after accounting for visibility and overheads) as a tight
constraint on the age of the underlying population. Additionally, F435W and F606W expo-
sures will be obtained for half an orbit each to reach 26 mag, these will allow subtraction of
the continuum light from the Halphaobservations and provide further constraints to the popu-
lation through the colour (which can be compared to the F435W and F606W observations
for 2003dr, 2005E and 2007ke, should we detect anything).UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTUREDefaultfalsefalsefalsefalsefalseSUPPORTEDUNIDENTIFIEDBLANK FIELDThis object was generated by the targetselector and retrieved from the SIMBAD database.J2000J2000GALAXYSPIRALThis object was generated by the targetselector and retrieved from the SIMBAD database.J2000J2000GALAXYELLIPTICALThis object was generated by the targetselector and retrieved from the SIMBAD database.J2000J2000GALAXYSPIRALThis object was generated by the targetselector and retrieved from the SIMBAD database.J2000J2000~23 mag/arcsec^2 in visualGALAXYSPIRALThis object was generated by the targetselector and retrieved from the SIMBAD database.J2000J2000~23 mag/arcsec^2 in VACS/WFCImagingNoNoF606WACS/WFCImagingNoNoF435WACS/WFCImagingNoNoF606WACS/WFCImagingNoNoF435WACS/WFCImagingNoNoF606WACS/WFCImagingNoNoF435WACS/WFCImagingNoNoF606WACS/WFCImagingNoNoF435WACS/WFCRampFilterNoNoFR656NACS/WFCImagingNoNoF606WACS/WFCImagingNoNoF435WACS/WFCRampFilterNoNoFR656NPOS-TARGDITHER0.265LINE0.187falsefalse69.05420.67ACS-WFC-DITHER-BOX1falsePOS-TARGDITHER0.135LINEfalsefalse346.84WFC3-UVIS-DITHER-LINE-3PT3falseThe scheduling data was generated by CASM 22.2.CASM was run in Phase II mode./solaris/user1/mlink/work/OP-cache/13698-v01.xml4-point dither of the location of SN 2005E will be perform in filters F606W and F435W over 1 orbit each. WFC1-CTE aperture is used to combat CTE.(Tic-Visit
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:trans-version "20140605"
:date "21-Aug-2014 15:04:43.0"
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:number-of-orbits 2
:saa-model "27"
:si-bright-earth-limb-angle 20.0
:data-volume 2273792
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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:pcs-time 333
:si-vis-utilization 2886
:al-overhead-at-end 0
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:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3222
:pcs-gap 0
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(Tic-Orbit
:proposal-id 13698
:visit-id "01"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2999
: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 3222
:pcs-gap 0
)true20The scheduling data was generated by CASM 22.2.CASM was run in Phase II mode./solaris/user1/mlink/work/OP-cache/13698-v02.xml4-point dither of the location of SN 2003dr will be perform in filters F606W and F435W over 1 orbit each. WFC2 aperture is used to contain the galaxy within a single chip.(Tic-Visit
:proposal-id 13698
:visit-id "02"
:proposal-version -1
:trans-version "20140605"
:date "21-Aug-2014 15:04:45.0"
: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 2273792
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 13698
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
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(Tic-Orbit
:proposal-id 13698
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3022
: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 3358
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)
(Tic-Orbit
:proposal-id 13698
:visit-id "02"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3135
: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 3358
:pcs-gap 0
)true20The scheduling data was generated by CASM 22.2.CASM was run in Phase II mode./solaris/user1/mlink/work/OP-cache/13698-v03.xml4-point dither of the location of SN 2007ke will be perform in filters F606W and F435W over 1 orbit each. WFC1-CTE aperture is used to combat CTE.(Tic-Visit
:proposal-id 13698
:visit-id "03"
:proposal-version -1
:trans-version "20140605"
:date "21-Aug-2014 15:04:47.0"
: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 2273792
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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:obset-id "03"
:pcs-mode "FGS"
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(Tic-Orbit
:proposal-id 13698
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:orbit-number 1
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:si-vis-utilization 2982
:al-overhead-at-end 0
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:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3316
:pcs-gap 0
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(Tic-Orbit
:proposal-id 13698
:visit-id "03"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3091
:al-overhead-at-end 0
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:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
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)true20The scheduling data was generated by CASM 22.2.CASM was run in Phase II mode./private/var/folders/ny/y2rfgxpn4k37g754z2ph3gd00001bc/T/OPVisit7791878466075012156.xml3 point line dither will be used to obtain F606W and F438W observations over half an orbit each of the location of SN 2001co. These observations used the UVIS-2k2c-SUB subarray to combat buffer issues due to short exposure lengths. Halpha (F665N) observations will be taken over the subsequent orbit using the same aperture.(Tic-Visit
:proposal-id 13698
:visit-id "04"
:proposal-version -1
:trans-version "20140605"
:date "23-Sep-2014 11:55:08.0"
: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 633488
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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:pcs-mode "FGS"
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(Tic-Orbit
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:si-vis-utilization 2911
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:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3232
:pcs-gap 0
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(Tic-Orbit
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:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
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)true20The scheduling data was generated by CASM 22.2.CASM was run in Phase II mode./private/var/folders/ny/y2rfgxpn4k37g754z2ph3gd00001bc/T/OPVisit6007226087937728598.xml3 point line dither will be used to obtain F606W and F438W observations over half an orbit each of the location of SN 2001co. These observations used the UVIS-2k2c-SUB subarray to combat buffer issues due to short exposure lengths. Halpha (F665N) observations will be taken over the subsequent orbit using the same aperture.(Tic-Visit
:proposal-id 13698
:visit-id "05"
:proposal-version -1
:trans-version "20140605"
:date "23-Sep-2014 11:56:08.0"
: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 633488
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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:pcs-mode "FGS"
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(Tic-Orbit
:proposal-id 13698
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:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3222
:pcs-gap 0
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(Tic-Orbit
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:orbit-number 2
:pcs-time 222
:si-vis-utilization 2999
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:dark-offset NIL
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:low-sky "N"
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)true20