Search

Start Over Facility HST
51. HST photometry of 74 galactic globular clusters
ID:
ivo://CDS.VizieR/J/A+A/391/945
Title:
HST photometry of 74 galactic globular clusters
Short Name:
J/A+A/391/945
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the complete photometric database and the color-magnitude diagrams for 74 Galactic globular clusters observed with the HST/WFPC2 camera in the F439W and F555W bands. A detailed discussion of the various reduction steps is also presented, and of the procedures to transform instrumental magnitudes into both the HST F439W and F555W flight system and the standard Johnson B and V systems. We also describe the artificial star experiments which have been performed to derive the star count completeness in all the relevant branches of the color magnitude diagram. The entire photometric database and the completeness function will be made available on the Web immediately after the publication of the present paper.
52. HST photometry of M4
ID:
ivo://CDS.VizieR/J/ApJS/120/265
Title:
HST photometry of M4
Short Name:
J/ApJS/120/265
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper presents a detailed description of the acquisition and processing of a large body of imaging data for three fields in the globular cluster M4 taken with the Wide Field and Planetary Camera 2 aboard the Hubble Space Telescope. Analysis with the ALLFRAME package yielded the deepest photometry yet obtained for this cluster. The resulting data set for 4708 stars (positions and calibrated photometry in V, I, and, in two fields, U) spanning approximately six cluster core radii is presented. The scientific analysis is deferred to three companion papers, which investigate the significant white dwarf population discovered and the main-sequence population.
53. HST photometry of 4 Virgo LSB galaxies
ID:
ivo://CDS.VizieR/J/ApJS/128/99
Title:
HST photometry of 4 Virgo LSB galaxies
Short Name:
J/ApJS/128/99
Date:
21 Oct 2021
Publisher:
CDS
Description:
Utilizing the F814W and F300W filters, Hubble Space Telescope Wide Field Planetary Camera-2 (WFPC2) images were taken of four low surface brightness galaxies in the direction of the Virgo Cluster - V7L3, V2L8, V1L4, and Malin 1. The high resolution of the WFPC2 combined with the extremely diffuse nature of the four galaxies makes them essentially transparent, allowing for the serendipitous discovery of 139 background galaxies visible through both the disks and nuclei of the foreground galaxies. Surface photometry was done on the newly discovered galaxies through the F814W (I-band) filter. The detected galaxies have both r1/4 and exponential-type profiles with radii (to the {mu}_F814W_=25.0mag/arcsec^2^ limit) less than 5.0". Their total magnitudes range from 18.9 through the survey cutoff at 25.0 in the F814W filter.
54. HST Planned and Archived Observations
ID:
ivo://nasa.heasarc/hstpaec
Title:
HST Planned and Archived Observations
Short Name:
HSTPAEC
Date:
14 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
This is the HST Planned and Archived Exposures Catalog (PAEC) as obtained from the Space Telescope Science Institute (STScI) Archive which created the original compilation from their Archive and Proposal databases. This database table provides a summary of all approved HST observations, including already completed observations and those which are planned to be executed as part of the current cycle or are reserved for execution by Guaranteed Time Observer (GTO) programs for the upcoming cycles. This database table provides a summary of both planned and completed HST observations. Much more information can be obtained about each exposure, and the data themselves can be retrieved, using STScI's Multimission Archive (URL is <a href="http://archive.stsci.edu/hst/">http://archive.stsci.edu/hst/</a>) or STScI's Archive Web Interface (URL is <a href="http://archive.stsci.edu/hst/search.php">http://archive.stsci.edu/hst/search.php</a>). Note that a number of solar system and other objects have 0 values for their 2000 equinox RA and declination coordinates in the original HST table and hence also in this HEASARC database. This HEASARC version of the HSTPAEC will be updated on a regular basis, usually within one month of the data files on the STScI Web site (URL <a href="http://archive.stsci.edu/hst/paec.html">http://archive.stsci.edu/hst/paec.html</a>) being updated. This database table is recreated by the HEASARC on a routine basis, usually within one month of the PAEC data files at the STScI Hubble Data Archive (HDA) being modified. This is a service provided by NASA HEASARC .
55. HST Quasar Absorption Line Key Project. X.
ID:
ivo://CDS.VizieR/J/ApJS/97/1
Title:
HST Quasar Absorption Line Key Project. X.
Short Name:
J/ApJS/97/1
Date:
21 Oct 2021
Publisher:
CDS
Description:
Sensitive H I 21cm emission line spectra have been measured for the directions to 143 quasars and AGNs chosen from the observing lists for the HST Quasar Absorption Line Key Project. Narrow-band and wide-band data were obtained with the NRAO 43m radio telescope for each object. The narrow-band data have a velocity resolution of 1km/s, extend from -220 to +170km/s, and are corrected for stray 21cm radiation. The wide-band data have a resolution of 4km/s and extend from -1000 to +1000km/s. The data are important for the interpretation of ultraviolet absorption lines near zero redshift in Key Project spectra. Twenty-two percent of the quasars lie behind Galactic high-velocity H I clouds with |VLSR|>100km/s whose presence can increase the equivalent width of interstellar absorption lines significantly. This paper contains the emission spectra and measures of the H I velocities and column densities along the sight line to each quasar. We discuss how the measurements can be used to estimate the visual and ultraviolet extinction toward each quasar and to predict the approximate strength of the strong ultraviolet resonance lines of neutral gas species in the HST Key Project spectra.
56. HST snapshot survey of 3CR radio sources
ID:
ivo://CDS.VizieR/J/ApJS/122/81
Title:
HST snapshot survey of 3CR radio sources
Short Name:
J/ApJS/122/81
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present and describe optical counterparts to 46 3CR radio galaxies of redshifts less than 0.1 that were imaged with the Hubble Space Telescope's (HST) WFPC2 camera through the broadband F702W filter as part of the 3CR Snapshot Survey. This is the fifth and last such paper describing the 252 radio galaxies of this R-band survey. At the 0.1'' resolution of the images, a wealth of detail is visible. Approximately 89% of the galaxies are ellipticals, and nearly all reside in groups or clusters of galaxies of various richness and compactness. Nearby elliptical companions of slightly smaller size and mass are common. Dust is prevalent in the cores of the 3C hosts; nearly half of the galaxies possess some type of dust structure, such as irregular dust lanes, filaments, or disks. Besides the well-known dust disks of 3C 264 and 3C 270, we have found five new candidates in 3C 31, 3C 40, 3C 296, 3C 449, and 3C 465, as well as in the central regions of the nearby neighbors of 3C 31 and 3C 465. Our sample includes six confirmed optical synchrotron jets in 3C 15, 3C 66B, 3C 78, 3C 264, 3C 274, and 3C 371, or approximately 13% of the sample. Unresolved nuclei, consistent with the point spread function of WFPC2, are found in 43%-54% of the galaxies and in the majority of galaxies with dust disks and optical jets.
57. HST Space Telescope Imaging Spectrograph
ID:
ivo://mast.stsci/ssap/hst/stis
Title:
HST Space Telescope Imaging Spectrograph
Short Name:
HST STIS Spectra
Date:
22 Jul 2020 21:58:09
Publisher:
Space Telescope Science Institute Archive
Description:
MAST-produced spectral container files for STIS spectra. STIS spectra range from 1150 to 10,300 at low to medium spectral resolution, high spatial resolution echelle spectroscopy in the ultraviolet. STIS began operation in 1997. (Note the included echelle spectra are technically not yet supported by the SSAP.)
58. HST studies of the WLM globular cluster
ID:
ivo://CDS.VizieR/J/ApJ/521/577
Title:
HST studies of the WLM globular cluster
Short Name:
J/ApJ/521/577
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have obtained V and I images of the lone globular cluster that belongs to the dwarf Local Group irregular galaxy known as WLM. The color-magnitude diagram of the cluster shows that it is a normal old globular cluster with a well-defined giant branch reaching to M_V_=-2.5, a horizontal branch at M_V_=+0.5, and a subgiant branch extending to our photometry limit of M_V_=+2.0. A best fit to theoretical isochrones indicates that this cluster has a metallicity of [Fe/H]=-1.52{+/-}0.08 and an age of 14.8{+/-}0.6 Gyr, thus indicating that it is similar to normal old halo globulars in our Galaxy. From the fit we also find that the distance modulus of the cluster is 24.73{+/-}0.07 and the extinction is A_V_=0.07{+/-}0.06, both values that agree within the errors with data obtained for the galaxy itself by others.
59. HST trans-Neptunian Objects Search field images
ID:
ivo://mast.stsci/siap/hst.tno
Title:
HST trans-Neptunian Objects Search field images
Short Name:
HST.TNO
Date:
22 Jul 2020 22:31:56
Publisher:
Space Telescope Science Institute Archive
Description:
The "TNO Search Field" images are the sidereally summed images of a search for trans-Neptunian objects (TNOs) using the Wide Field Camera of the HST/ACS instrument. The observations were taken under Cycle 11 program GO-9433, "The Size Distribution of Kuiper Belt Bodies," with G. Bernstein as PI. The TNO search consisted of approximately 96x400 s exposures in the F606W filter for each of six contiguous ACS fields of view. The TNO search field is approximately 6'x10', centered near 14h 07M 53.3s -11d 21' 38" (J2000).
60. HST Ultra Deep Field (UDF) Images
ID:
ivo://mast.stsci/siap/hst.udf
Title:
HST Ultra Deep Field (UDF) Images
Short Name:
HST.UDF
Date:
22 Jul 2020 22:32:35
Publisher:
Space Telescope Science Institute Archive
Description:
The ACS Ultra Deep Field (UDF) is a cycle 12 survey carried out using the Advanced Camera for Surveys (ACS) on HST and taking advantage of the Director's Discretionary time. The UDF consists of a single ultra-deep field (412 orbits in total taken in 4 bands) within the CDF-S GOODS area. It is the deepest image ever obtained with Hubble. This service also includes data from the UDF follow-Up program by PI Massimo Stiavelli and colleagues obtained under HST cycle 14 program 10632 titled Searching for galaxies at z>6.5 in the Hubble Ultra Deep Field (also known as UDF05).