A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Astronomy and Astrophysics » Hubble
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Daily # 3964



 
 
Thread Tools Display Modes
  #1  
Old October 12th 05, 03:41 PM
Joe Cooper
external usenet poster
 
Posts: n/a
Default Daily # 3964

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science

DAILY REPORT # 3964

PERIOD COVERED: UT October 11, 2005 (DOY 284)

OBSERVATIONS SCHEDULED

ACS/WFC 10496

Decelerating and Dustfree: Efficient Dark Energy Studies with
Supernovae and Clusters

We propose a novel HST approach to obtain a dramatically more useful
"dust free" Type Ia supernovae {SNe Ia} dataset than available with
the previous GOODS searches. Moreover, this approach provides a
strikingly more efficient search-and-follow-up that is primarily pre-
scheduled. The resulting dark energy measurements do not share the
major systematic uncertainty at these redshifts, that of the
extinction correction with a prior. By targeting massive galaxy
clusters at z 1 we obtain a five-times higher efficiency in
detection of Type Ia supernovae in ellipticals, providing a
well-understood host galaxy environment. These same deep cluster
images then also yield fundamental calibrations required for future
weak lensing and Sunyaev-Zel'dovich measurements of dark energy, as
well as an entire program of cluster studies. The data will make
possible a factor of two improvement on supernova constraints on dark
energy time variation, and much larger improvement in systematic
uncertainty. They will provide both a cluster dataset and a SN Ia
dataset that will be a longstanding scientific resource.

ACS/WFC 10569

A Last Look at the First Gravitational Lens

Strong gravitational lensing provides our best probe of the behavior
of dark matter in galaxy halos and their substructure. We undertake
ACS imaging to gain new strong and weak lensing data for the
first-discovered lens system Q0957+561. We will make a weak lensing
image spanning 6' to map the potential of the cluster around the lens
galaxy, and simultaneously obtain a deep image of more than 10
multiply-imaged features in the strong lensing region. This will
complete HST's legacy dataset for Q0957+561: a deep multicolor image
of a rich multiple-image system, an extremely high-quality weak
lensing map, and an existing deep NICMOS image of the Einstein ring.
We will combine these three kinds of data into a single lens model--a
first--to produce a sophisticated dark matter map that will provide a
uniquely detailed view of the relation between visible and dark matter
on galaxy scales, and the best available constraints on dark
substructure. In addition, the best available $H_0$ measurement from
lensing will potentially allow us to leverage the WMAP data into a
more precise measurement of dark energy properties as well.
Astrophysics with strong lensing depends crucially on HST's unique
capability for precise, well-resolved observations of
low-surface-brightness structures next to bright objects, so it is a
high priority to address outstanding questions before the demise of
HST.

ACS/WFC 10588

The Host Galaxies of Post-Starburst Quasars

We propose to use ACS to conduct a snapshot imaging survey of
post-starburst quasars now being discovered in signficant numbers by
the Sloan Digital Sky Survey. Post-starburst quasars are broad-lined
AGN that also possess Balmer jumps and high-n Balmer absorption lines
indicative of luminous stellar populations on order of 100 Myr old.
These objects, representing a few percent of the z 0.5 quasar
population, may be an evolutionary stage in the transition of
ultraluminous infrared galaxies into normal quasars, or a type of
galaxy interaction that triggers both star formation and nuclear
activity. These sources may also illustrate how black hole mass/bulge
mass correlations arise. Ground-based imaging of individual
poststarburst quasars has revealed merger remnants, binary systems,
and single point sources. Our ACS snapshots will enable us to
determine morphologies and binary structure on sub-arcsecond scales
{surely present in the sample and impossible to do without HST}, as
well as basic host galaxy properties. We will be looking for
relationships among morphology, particularly separation of double
nuclei, the starburst age, the quasar black hole mass and accretion
rate, that will lead to an understanding of the triggering activity
and mutual evolution. This project will bring quantitative data and
statistics to the previously fuzzy and anecdotal topic of the
"AGN-starburst connection" and help test the idea that post-starburst
quasars are an early evolutionary stage of normal quasars.

WFPC2 10360

WFPC2 CYCLE 13 INTERNAL MONITOR

This calibration proposal is the Cycle 13 routine internal monitor for
WFPC2, to be run weekly to monitor the health of the cameras. A
variety of internal exposures are obtained in order to provide a
monitor of the integrity of the CCD camera electronics in both bays
{gain 7 and gain 15}, a test for quantum efficiency in the CCDs, and a
monitor for possible buildup of contaminants on the CCD windows.

WFPC2 10745

WFPC2 CYCLE 14 INTERNAL MONITOR

This calibration proposal is the Cycle 14 routine internal monitor for
WFPC2, to be run weekly to monitor the health of the cameras. A
variety of internal exposures are obtained in order to provide a
monitor of the integrity of the CCD camera electronics in both bays
{both gain 7 and gain 15 -- to test stability of gains and bias
levels}, a test for quantum efficiency in the CCDs, and a monitor for
possible buildup of contaminants on the CCD windows. These also
provide raw data for generating annual super-bias reference files for
the calibration pipeline.

FLIGHT OPERATIONS SUMMARY:

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

HSTARS:

9973 - GSacq(2,1,2) resulted in finelock backup (1,0,1) @
285/06:26:28z GSacq(2,1,2) scheduled at 285/06:22:21 resulted in
finelock backup (1,0,1) due to scan step limit exceeded on FGS 2. The
OBADS showed errors of:
OBAD1: V1=1110.39, V2=2669.34, V3=2167.53, RSS= 3613.38
OBAD2: V1= 1.44, V2= 3.15, V3= 0.87, RSS= 3.57

9974 - GSacq(2,1,2) failed @ 285/07:46:48z GSacq(2,1,2) scheduled at
285/07:42:39 - 07:49:53 failed. A ESB 1805 (T2G Moving Target
detected) was recieved at 07:46:50. Only stop flags QF1STOPF and
QF2STOPF were recieved.
OBAD1: V1= -63.09, V2= -5124.02, V3= -46.36, RSS = 5124.62
OBAD2: V1= 13.93, V2= 7.64, V3= 4.68, RSS= 16.56
Map M1,2: V1= -1.94, V2= -137.35, V3= -4.88, RSS= 137.45

COMPLETED OPS REQUEST:

17569-0 Off-line +D and -AA SPA Trim Relays @ 284/14:50z
17537-1 Restore TMDIAG Slot 0 for VehConLaw.Integral Path Data (Generic
OR) @ 284/14:56z

COMPLETED OPS NOTES: (None)

SCHEDULED SUCCESSFUL FAILURE TIMES
FGS Gsacq 6 6
FGS
Reacq 4 3
285/07:46:38z (HSTAR# 9974)
OBAD with Maneuver 18 18

SIGNIFICANT EVENTS:

Flash Report: Off Line +D and -AA strings (Ops Req #17569-0) On DOY
2005/284, Ops Request 17569-0 was successfully executed to command the
+BB (Batt 3) and the +B (Batt 4) SPAs back on-line via IP-097:
Procedure to Modify Commanding of the +BB and the +B SPA Trim Relays:
Removal Procedure. The Ops Request also called upon IP-099: Procedure
to Modify Commanding of the -AA and +D SPA Trim Relays: Update
Procedure, to command -AA (Batt 4) and the +D (Batt 1) SPAs off-line.
Battery pressures, and temperatures performed nominally.

The Electrical Power Subsystem continues to perform as expected.


 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
COUNT THE STARS CON-TEST EXTENDED -- 2004 Hubble Ultra View - Universe - Space - Galaxies - Evolution or Intelligent Design??? Ed Conrad Amateur Astronomy 4 August 25th 05 09:34 PM
Ed Conrad's NEW Letter to Prof. Michael Behe Ed Conrad Astronomy Misc 0 June 21st 05 10:50 AM
MYSTERIOUS ARTIFACTS, FOSSILS - Exhibit Now in Berlin -- Smallest Woman (5 in. or 14 cm) - Petrified Human Bones Found in Coal Seams & MORE Ed Conrad Astronomy Misc 0 June 9th 05 01:00 AM
EVOLUTION DEAD AT AGE 126 -- R.I.P. Ed Conrad Astronomy Misc 4 August 21st 04 12:01 AM


All times are GMT +1. The time now is 10:10 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.