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Daily Report #5007



 
 
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Old January 7th 10, 03:38 PM posted to sci.astro.hubble
Bassford, Lynn[_2_]
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Default Daily Report #5007

HUBBLE SPACE TELESCOPE - Continuing to Collect World Class Science

DAILY REPORT #5007

PERIOD COVERED: 5am January 6 - 5am January 7, 2010 (DOY 006/10:00z-007/10:00z)

OBSERVATIONS SCHEDULED

ACS/WFC3 11879

CCD Daily Monitor (Part 1)

This program comprises basic tests for measuring the read noise and
dark current of the ACS WFC and for tracking the growth of hot pixels.
The recorded frames are used to create bias and dark reference images
for science data reduction and calibration. This program will be
executed four days per week (Mon, Wed, Fri, Sun) for the duration of
Cycle 17. To facilitate scheduling, this program is split into three
proposals. This proposal covers 352 orbits (22 weeks) from 31 August
2009 to 31 January 2010.

COS/FUV 11526

COS-GTO: Sampling the Local ISM with Hot White Dwarfs

We shall use hot white dwarf stars located within 150pc of the Sun to
probe the absorption properties of the interstellar gas associated
with the local cavity. There is still much debate concerning the
ionization state of the local gas, since previously detected highly
ionized lines (such as CIV and SiIV) could be associated with the
circumstellar environments of hot white dwarfs. By using a priori
knowledge of the velocity structure of the interstellar sight-lines to
these targets (gained from high spectral resolution ground- based
observations) in conjunction with the UV absorption data gained with
HST-COS, we shall be able to better determine both the physical and
chemical state of the numerous diffuse interstellar clouds present
within the local cavity.

COS/FUV 11895

FUV Detector Dark Monitor

The purpose of this proposal is to monitor the FUV detector dark rate
by taking long science exposures without illuminating the detector.
The detector dark rate and spatial distribution of counts will be
compared to pre-launch and SMOV data in order to verify the nominal
operation of the detector. Variations of count rate as a function of
orbital position will be analyzed to find dependence of dark rate on
proximity to the SAA. Dependence of dark rate as function of time will
also be tracked.

COS/NUV 11705

Physical Properties of Quasar Outflows: From BALs to Mini-BALs

Accretion disk outflows are important components of quasar
environments. They might play a major role in facilitating accretion,
regulating star formation in the host galaxies and distributing metals
to the surrounding gas. They reveal themselves most conspicuously via
broad absorption lines (BALs), but they appear even more frequently in
other guises such as the weaker and narrower "mini-BALs." How are
these diverse outflow features related? Are mini-BALs really just
"mini" versions of the BALs, or do they represent a fundamentally
different type of outflow, with different degrees of ionization,
column densities, mass loss rates, physical origins, etc.?

We propose HST-COS spectroscopy to make the first quantitative
assessment of the outflow physical conditions across the full range of
weak/narrow mini-BALs to strong/broad BALs. Our strategy is to measure
key diagnostic lines (SVI, OVI, CIII, SIV, PV, etc.) at 930A - 1130A
(rest-frame) in a sample of 7 outflow quasars with known mini- BALs
through weak BALs. We will then 1) combine the COS data with
ground-based spectra of the same quasars to include more lines (CIV,
SiIV) at longer wavelengths, and 2) include in our analysis a nearly
identical UV/optical dataset obtained previously for a sample of
quasars with strong BALs. Our study of this combined dataset will be
an essential next step toward a more global understanding of quasar
outflows.

COS/NUV 11896

NUV Spectroscopic Sensitivity Monitoring

The purpose of this proposal is to monitor sensitivity of each NUV
grating mode to detect any changes due to contamination or other
causes.

STIS/CCD 11844

CCD Dark Monitor Part 1

The purpose of this proposal is to monitor the darks for the STIS CCD.

STIS/CCD 11846

CCD Bias Monitor-Part 1

The purpose of this proposal is to monitor the bias in the 1x1, 1x2,
2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4, to build up
high-S/N superbiases and track the evolution of hot columns.

STIS/CCD/MA1/MA2 11866

Echelle Grating Blaze Function Zero Points

We will observe the flux standard G191B2B, obtaining echelle spectra
in all primary and intermediate wavelength settings. While this was
done in cycle 10 (8915), the echelle blaze shift has proved to depend
sensitively on side of operation, time and the exact MSM positioning.
We therefore believe it is important to obtain a complete set of post-
repair data at default MSM position to allow a comprehensive solution
for the echelle blaze shifts on a repaired side 2.

WFC3/ACS/UVIS 11603

A Comprehensive Study of Dust Formation in Type II Supernovae with
HST, Spitzer, and Gemini

The recent discovery of three extremely bright Type II SNe, (2007it,
2007oc, 2007od) gives us a unique opportunity to combine observations
with HST, Spitzer, and Gemini to study the little understood dust
formation process in Type II SNe. Priority 1 Spitzer Cycle 5 and band
1 Gemini 2008A time has already been approved for this project. Since
late-time Type II SNe are faint and tend to be in crowded fields, we
need the high sensitivity and high spatial resolution of ACS and
NICMOS/NIC2 for these observations. This project is motivated by the
recent detection of large amounts of dust in high redshift galaxies.
The dust in these high-z galaxies must come from young, massive stars
so Type II SNe could be potential sources. The mechanism and the
efficiency of dust condensation in Type II SN ejecta are not well
understood, largely due to the lack of observational data. We plan to
produce a unique dataset, combining spectroscopy and imaging in the
visible, near- and mid-IR covering the key phase, 400- 700 days after
maximum when dust is known to form in the SN ejecta. Therefore, we are
proposing for coordinated HST/NOAO observations (HST ACS, NICMOS/NIC2
& Gemini/GMOS and TReCS) which will be combined with our Spitzer Cycle
5 data to study these new bright SNe. The results of this program will
place strong constraints on the formation of dust seen in young high
redshift (z5) galaxies.

WFC3/UVIS/IR 11909

UVIS Hot Pixel Anneal

The on-orbit radiation environment of WFC3 will continually generate
new hot pixels. This proposal performs the procedure required for
repairing those hot pixels in the UVIS CCDs. During an anneal, the
two-stage thermo-electric cooler (TEC) is turned off and the
four-stage TEC is used as a heater to bring the UVIS CCDs up to ~20
deg. C. As a result of the CCD warmup, a majority of the hot pixels
will be fixed; previous instruments such as WFPC2 and ACS have seen
repair rates of about 80%. Internal UVIS exposures are taken before
and after each anneal, to allow an assessment of the procedure's
effectiveness in WFC3, provide a check of bias, global dark current,
and hot pixel levels, as well as support hysteresis (bowtie)
monitoring and CDBS reference file generation. One IR dark is taken
after each anneal, to provide a check of the IR detector.

FLIGHT OPERATIONS SUMMARY:

Significant Spacecraft Anomalies: (The following are preliminary
reports of potential non-nominal performance that will be
investigated.)

HSTARS: (None)

COMPLETED OPS REQUEST: (None)

COMPLETED OPS NOTES: (None)

SCHEDULED SUCCESSFUL
FGS GSAcq 6 6
FGS REAcq 12 12
OBAD with Maneuver 4 4

SIGNIFICANT EVENTS: (None)
 




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