Status Report

Hubble Space Telescope Daily Report #3029 – 8 Jan 2002

By SpaceRef Editor
January 8, 2002
Filed under , ,



PERIOD COVERED: 0000Z (UTC) 01/07/02 – 0000Z (UTC) 01/08/02

Daily Status Report as of 008/0000Z


1.1 Completed Four Sets of STIS/CCD 9088 (Next Generation Spectral
Library of Stars)

The Space Telescope Imaging Spectrograph (CCD) was used to produce
a “Next Generation” Spectral Library of 600 stars for use in modeling the
integrated light of galaxies and clusters by using the low dispersion UV
and optical gratings of STIS. The library will be roughly equally divided
among four metallicities, very low {Fe/H < -1.5}, low {-1.5 < Fe/H < -0.5}, near-solar {-0.5 < Fe/H < 0.1}, and super-solar {Fe/H > 0.1}, well-sampling
the entire HR-diagram in each bin. Such a library will surpass all extant
compilations and have lasting archival value, well into the Next Generation
Space Telescope era. No problems occurred.

1.2 Completed Seven Sets of WF/PC-2 9318 (POMS Test Proposal: WFII
Parallel Archive Proposal Continuation)

The WF/PC-2 was used to perform the generic target version of the
WFPC2 Archival Pure Parallel program. The program was used to take
parallel images of random areas of the sky, following the recommendations
of the Parallels Working Group. There were no reported problems.

1.3 Completed Four Sets of STIS/CCD 8901 (Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. There was no anomalous activity.

1.4 Completed Four Sets of WF/PC-2 8942 (Cycle 10 Intflat Sweeps and
Linearity Test)

The WF/PC-2 was used to monitor the pixel-to-pixel flatfield
response and provide a linearity check. These intflat sequences are done
once during the year and the images will provide a backup database in the
event of complete failure of the visflat lamp as well as allow monitoring
of the gain ratios. There were no reported problems.

1.5 Completed Five Sets of WF/PC-2 8937 (Cycle 9 Supplemental Darks pt2/3)

The WF/PC-2 was used obtain three dark frames every day to provide
data for monitoring and characterizing the evolution of hot pixels. No
problems were encountered.

1.6 Completed STIS/CCD 8291 (The Alpha-Element/Iron Ratio in Starburst

The Space Telescope Imaging Spectrograph (CCD) was used to observe
A and F supergiants in NGC1569, the closest starburst galaxy. Spectra
around 6200 Angstrom taken with the G750M grating will be used to determine
element abundances of Fe and several Alpha-elements. The galaxy has
experienced a strong starburst over the past few hundred Myr and possibly
only very few and much less intense episodes of star formation at earlier
epochs. Chemical evolution models predict a significant Alpha/Fe
enhancement in the galaxy. The proposal completed with no reported anomalies.

1.7 Completed WF/PC-2 8059 (POMS Test Proposal: Targeted Parallel
Archive Proposal)

The WF/PC-2 was used to observe the parallel opportunities
available in the neighborhood of bright galaxies are treated in a slightly
different way from the normal pure parallels. Local Group galaxies offer
the opportunity for a closer look at young stellar
populations. Narrow-band images in F656N can be used both to identify
young stars via their emission lines, and to map the gas distribution in
star-forming regions. The observations completed nominally.

1.8 Completed WF/PC-2 8939 (Cycle 10 Internal Monitor)

The WF/PC-2 was used to calibrate the internal monitor, to be run
weekly to monitor the health of the cameras. No problems were encountered.

1.9 Completed Four Sets of WF/PC-2 8935 (Cycle 10 Standard Darks)

The WF/PC-2 was used to obtain dark frames every week in order to
provide data for the ongoing calibration of the CCD dark current rate, and
to monitor and characterize the evolution of hot pixels. Over an extended
period these data will also provide a monitor of radiation damage to the
CCDs. The proposal completed with no reported problems.

1.10 Completed STIS/CCD/MA1 8638 (Temperature Scale And Metal
Abundances Of Hot Hydrogen-Rich Central Stars Of Planetary Nebulae)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
perform UV spectroscopy on a sample of hot hydrogen-rich central stars of
PNe, covering the hottest phase of post-AGB evolution. The spectra will
then be analyzed with fully metal line blanketed NLTE model atmospheres in
order to determine T_eff, surface gravity, and chemical composition. The
proposal completed with no reported problems.

1.11 Completed Two Sets of STIS/CCD 8903 (Bias Monitor – Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the bias in the 1×1, 1×2, 2×1, and 2×2 bin settings at gain=1, and 1×1 at
gain = 4 to build up high-S/N superbiases and track the evolution of hot
columns. There were no problems.

1.12 Completed STIS/CCD-2 9107 (The Fundamental Plane for Nuclear Black

The Space Telescope Imaging Spectrograph (CCD) was used to conduct
more in-depth searches for supermassive black holes in galaxy
centers. Previous work has led to the discoveries that {1} most or all hot
galaxies contain massive dark objects at their centers, presumably black
holes; {2} there is a remarkably tight correlation between the black-hole
mass and the luminosity-weighted velocity dispersion of the hot component
of the galaxy. This mbh-Sigma relation has a scatter which is <0.3 dex in mbh and consistent with zero. This relationship suggests a strong link between black-hole formation, AGN activity, and galaxy formation, and once it is understood this link should advance our understanding of all three processes. The goal of this proposal is to investigate the scatter in the mbh-Sigma relation and the role of possible second parameters, by examining a sample of galaxies at fixed velocity dispersion Sigma=200+/- 20 kms. This approach decouples the effects of a second parameter from uncertainties in the shape of the mbh-Sigma relation, and minimizes spurious correlations because all of the galaxies will be studied using the same well-tested observational and modeling techniques. No anomalous activity occurred.

1.13 Completed WF/PC-2 9087 (Black Hole X-ray Transients and X-ray
Binaries in M31)

The WF/PC-2 was used to search for M31 for x-ray transients which
had previously been seen as part of the Chandra Guaranteed Time
Observations {GTO} program. The x-ray properties of these transient
sources {spectra, variability} allow us to determine whether the accreting
object is a black hole or a neutron star. It is proposed to determine the
nature of the mass-losing star. Massive stars will show little {<2 mag} change in their UV luminosities during outbursts, while low-mass stars will show large {>5 mag} changes in their UV luminosities. By determining the
nature of the primary {accreting} and secondary stars in these x-ray
transients, we will have the first dataset that will allow the evolution of
black hole and neutron star binaries to be studied in an external
galaxy. The proposal completed nominally.

1.14 Completed Three Sets of STIS/CCD 9312 (POMS Test Proposal: STIS
Non-scripted Parallel Proposal Continuation IV)

The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude, non-scripted parallel observations as part of a POMS
test proposal. The observations were completed as planned, and no
anomalies were reported.


2.1 Guide Star Acquisitions:

Scheduled Acquisitions: 7

Successful: 7

Scheduled Re-acquisitions: 8

Successful: 8

2.2 FHST Updates:

Scheduled: 17

Successful: 17

2.3 Operations Notes:

Using ROP SR-1A, the SSR-1 EDAC error counter was cleared twice.

The ephemeris table was loaded at 008/0111Z per ROP DF-07A.


Continuation of normal science observations and calibrations.

SpaceRef staff editor.