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Topic: WFPC2

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	Observations (Site not responding. Last check: 2007-10-08)
		WFPC2 images of three fields in NGC 2024, three fields in NGC 2068, and one field in NGC 2071.
		Figure 1 is a WFPC2 mosaic of a field in NGC 2024.
		Note that a WFPC2 mosaic consists of three Wide Field camera images with a scale of 0.097 arcsec per pixel and a single Planetary Camera frame with 0.046 arcsec per pixel.
	www.astro.umass.edu /preprints/starform/binary/node2.html (330 words)

	The European Homepage For The NASA/ESA Hubble Space Telescope - WFPC2
		The 'heart' of WFPC2 consists of an L-shaped trio of wide-field sensors and a smaller, high resolution (Planetary) Camera placed at the square's remaining corner.
		WFPC2 has produced most of the stunning images that have been released as public outreach images over the years.
		Its resolution and excellent quality are some of the reasons that WFPC2 has been the most used instrument in the first 13 years of Hubble's life.
	www.spacetelescope.org /about/general/instruments/wfpc2.html (191 words)

	Trifid Nebula AAS Poster
		HST WFPC2 Observations of EGGs and YSO Jets in the Trifid Nebula
		We report HST WFPC2 observations of a field in the southern portion of the prominent H II region M 20, the Trifid Nebula.
		The clumpy distribution of stars in the WFPC2 field of view suggests a history in which a sequence of denser-than-average regions in the molecular cloud have been run over by the advancing ionization front which first triggered the formation of stars in these regions, and a short time later uncovered the newly formed stars.
	eagle.la.asu.edu /hester/m20.html (1408 words)

	Howstuffworks "How Hubble Space Telescope Works"
		WFPC2 is the main "eye," or camera, of the HST.
		WFPC2 can take images through various filters (red, green, blue) to make natural color pictures, such as this image of the Eagle nebula.
		Often times, interstellar gas and dust can block our vision of the visible light from various celestial objects; however, it is possible to see the infra-red light, or heat, from the objects hidden in the dust and gas.
	science.howstuffworks.com /hubble3.htm (1003 words)

	Wide Field and Planetary Camera 2 - Wikipedia, the free encyclopedia
		The charge-coupled devices (CCDs) in the WFPC2 detect electromagnetic radiation in a range from 120 nm to 1100 nm.
		This includes the 380 nm to 780 nm of the visible spectrum, all of the near ultraviolet (and a small part of the extreme ultraviolet band) and most of the near infrared band.
		WFPC2 was built by NASA's Jet Propulsion Laboratory, which also built the predecessor WFPC ("WFPC1") camera originally launched with Hubble in 1990.
	en.wikipedia.org /wiki/Wide_Field_and_Planetary_Camera_2 (620 words)

	Mars Exploration: Multimedia
		This stunning portrait was taken with the HST Wide Field Planetary Camera- 2 (WFPC2) on March 10, 1997, just before Mars opposition, when the red planet made one of its closest passes to the Earth (about 60 million miles or 100 million km).
		The WFPC2 was used to monitor dust storm activity to support the Mars Pathfinder and Mars Global Surveyor Orbiter Missions, which are currently en route to Mars.
		The WFPC2 was used to observe Mars in nine different colors spanning the ultraviolet to the near infrared.
	mars.jpl.nasa.gov /gallery/global/PIA01249.html (474 words)

	ACS Web ETCs
		The exposure time calculator of the ACS and that of the WFPC2 provide an estimate of the signal-to-noise ratio (SNR) achieved in a given exposure time on a specific source using any of the instrument modes.
		Both calculators are based on a model of the instrument (sensitivity and transmission of the optics) as well as on a model of the source and of the background.
		The pixel size of the ACS is always smaller or equal to that of the WFPC2: the ACS/WFC has a plate-scale equivalent to that of the PC, although with much greater area, whereas the WF chips of the WFPC2 have a plate-scale twice as large.
	apt.stsci.edu /webetc/acs/help/acs_faq_hlp.html (1306 words)

	HDF
		WFPC2 data looks marginally ok (roughly log-normal distributions).
		Rest-frame asymmetries estimated from the apparent WFPC2 and NICMOS bands via a linear interpolation as a function of redshift.
		This shows that there is a systematic increase in asymmetry values as the redshift pushes the rest-frame band into the observed NICMOS H band.
	www.astro.wisc.edu /~mab/projects/hdf (942 words)

	HST MEDIUM DEEP SURVEY (Site not responding. Last check: 2007-10-08)
		For some observations the change in the differential aberration between the primary and the WFPC2 is significant and causes a drift of over 0.5 WFPC2 pixels.
		However for parallel WFPC2 observations it could be larger because aberration corrections made for the primary instrument is slightly different from that required for the WFPC2.
		Since jitter data is still not consistantly available for all WFPC2 observations we have not as yet incorporated them into the MDS pipeline.
	astro.phys.cmu.edu /mds/mle/jitter.html (534 words)

	WFPC2 Imaging of Nearby Ellipticals (Site not responding. Last check: 2007-10-08)
		Abstract: The Hubble Space Telescope's Wide Field and Planetary Camera 2 (WFPC2) has several advantages over ground--based observations for the study of globular cluster luminosity functions (GCLFs) and distance determination.
		Here we present WFPC2 data on the globular clusters associated with NGC 5846.
		The luminosity function in each of these pointings are statistically the same, indicating that the mean luminosity (mass) does not vary between ~ 3 and 30 kpc from the galaxy center.
	www.ucolick.org /~brodie/Sages/Web/n5846/abstract.html (254 words)

	Binary Identification and Comparison with Simulations
		Using the TINYTIM software courtesy of J. Krist at STScI, we produced a simulated WFPC2 point spread function (hereafter PSF) appropriate for a K star observed with the F814W filter on the WF4 chip.
		Since this PSF was oversampled by a factor of 6 compared to the actual WFC, the effects of subpixel shifts could be explored without interpolation by performing integral pixel shifts on the oversampled image and then rebinning to the WFC resolution.
		Whether this is a significant result or a statistical fluke requires a deeper, higher angular resolution survey aimed at careful study of a larger sample.
	www.astro.umass.edu /preprints/starform/binary/node3.html (984 words)

	Science Enabled with HST10X
		The image with WFPC2 resolution shows little more than the fact that the galaxy is asymmetrical, and has color gradients from the center to edge.
		The original image was a true-color composite of four WFPC2 images of the "Antennae Galaxies." The original image was scaled to give 0.3" separation between the nuclei of the two interacting galaxies.
		The observing strategy used during the HST Key Project on the Extra-galactic Distance Scale gave an "effective resolution" that was between the 2-pixel resolution of each epoch and the ~1 pixel resolution of all epochs combined.
	www.pha.jhu.edu /groups/hst10x/0report/2science/2science.html (4490 words)

	Astron. Astrophys. 348, 418-436 (1999)
		We used the WFPC2 aboard the HST to obtain F555W (WFPC2 broadband V) and F814W (WFPC2 broadband I) images of a region near the nucleus of NGC 5128.
		Since the PSF varies strongly with position on the WFPC2 CCDs, the potential for confusion between stellar images and concentrated GC candidates is great if the PSF is not removed, in some way, from the data.
		Each GC candidate was fitted with a Michie-King model that was convolved by an estimate of the PSF at the location of the object on the CCD.
	aa.springer.de /papers/9348002/2300418/sc2.htm (3694 words)

	NOVA \| Origins \| The Pillars of Creation (non-Flash) \| PBS
		For the Eagle Nebula image, the WFPC2 used filters that took images in the light of three kinds of atoms: hydrogen atoms, sulfur atoms with one electron removed (sulfur ions), and oxygen atoms with two electrons removed (doubly ionized oxygen).
		This is the cleaned-up version of the oxygen-filter image taken by the WF2 camera, that is, the camera that took the image of the upper left quadrant of the final image.
		This is the cleaned-up version of the oxygen-filter image taken by the WF3 camera, that is, the camera that took the image of the lower left quadrant of the final image.
	www.pbs.org /wgbh/nova/origins/hubb-nf.html (1739 words)

	Variable-Pixel Linear Combination
		They also produce images in which the noise properties are correlated from pixel to pixel and the statistical errors are difficult to estimate.
		Furthermore, large dithering offsets which may be used for WFPC2 imaging, combined with geometric distortion, produce a sampling pattern that varies across the field.
		The WFPC2 optics geometrically distort the images: pixels at the corner of each CCD subtend less area on the sky than those near the center.
	www.cv.nrao.edu /adass/adassVI/hookr.html (1413 words)

	:: NASA Quest > Archives :: (Site not responding. Last check: 2007-10-08)
		The first step in planning this observation is to decide on the instrument and its configuration.
		There are two imaging cameras on HST that we could use, WFPC2 (Wide-Field Planetary Camera 2) and FOC (Faint Object Camera).
		The WFPC2 was built to take picture over a wider area of "sky" and had to sacrifice resolution to get more area.
	quest.arc.nasa.gov /hst/fjournals/buie-1.html (1324 words)

	U-Haul SuperGraphics: Maryland
		Wide Field/Planetary Camera 2 (WFPC2) is this "eye." It acts like the retina of your eye in that light passes through a lens, is bent or refracted, and comes to a point or focus.
		The mirrors in the WFPC2 act as corrective lenses to the observatory's spherically aberrated primary mirror.
		Three cameras within WFPC2 deliver a broad perspective of the universe using a trio of L-shaped wide-field sensors; a fourth and smaller camera provides a higher resolution view.
	www.uhaul.com /supergraphics/hubble/three.html (1687 words)

	HubbleSite - WFPC
		ubble's "workhorse" instrument — the Wide Field and Planetary Camera 2 (WFPC2) — is behind most of the famous Hubble pictures.
		Its 48 filters allow scientists to study precise wavelengths of light and to sense a range of wavelengths from ultraviolet to near-infrared light.
		WFPC2 doesn't use film to record its images.
	hubblesite.org /the_telescope/nuts_.and._bolts/instruments/wfpc2 (196 words)

	Origins: Library
		A sampling of images taken by the Wide Field and Planetary Camera 2 (WFPC2) is available at http://www.jpl.nasa.gov/wfpcfavorites.
		Rising from a sea of dust and gas like a giant seahorse, the Horsehead nebula is one of the most photographed objects in the sky.
		The Horsehead, also known as Barnard 33, is a cold, dark cloud of gas and dust silhouetted against the bright red nebula IC 434.
	origins.jpl.nasa.gov /library/highlights/042401-a.html (448 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		Brad Whitmore, Inge Heyer, 2002, WFPC2 ISR 02-03, STScI.
		Brad Whitmore, Inge Heyer, and Sylvia Baggett, 1996, WFPC2 ISR 96-04, STScI.
		Brad Whitmore and Inge Heyer, 1995, WFPC2 ISR 95-04, STScI.
	www.cpu-net.com /host/vodheyer/publications.html (1023 words)

	HST Daily Report # 3299 \| SpaceRef Canada - Your Daily Source of Canadian Space News
		WFPC2/FGS 9332 WFPC2 Observations of Astrophysically Important Visual Binaries This is a continuation of a Cycle 7-8-9 Long-Term project.
		The program consists of annual or biannual WFPC2 or FGS observations of three visual binary stars that will ultimately yield fundamental astrophysical results, once their orbits and masses are determined.
		ACS/WFPC2 9481 Pure Parallel Near-UV Observations with WFPC2 within High-Latitude ACS Survey Fields In anticipation of the allocation of ACS high-latitude imaging survey{s}, we request a modification of the default pure parallel program for those WFPC2 parallels that fall within the ACS survey field.
	www.spaceref.ca /news/viewsr.html?pid=7997 (2553 words)

	Hubble Heritage
		When Hubble was first launched in April 1990, astronomers and engineers soon learned that a tiny error in the curvature of the primary mirror led to out of focus images.
		In December 1993, a repair mission to Hubble allowed astronauts to replace Hubble's first Wide Field/Planetary Camera (WF/PC) with a new instrument, Wide Field Planetary Camera 2 (WFPC2), that would correct the light path and create in-focus images.
		As well, we wish to thank the many astronomers who have used WFPC2 over the past 10 years and whose astronomical data populates the Hubble archive, and thus, the Heritage collection.
	heritage.stsci.edu /2003/30/wfpc2.html (169 words)

	The First Six Months of WFPC2 Science (Site not responding. Last check: 2007-10-08)
		This winter marked an auspicious new beginning for the refurbished Hubble Telescope, including the successful installation and optical alignment of WFPC2.
		WFPC2 began scheduled GO and GTO observations in mid-January.
		Here, a representative few are discussed to highlight science enabled by WFPC2 and the corrected HST, and to illustrate the prospects for new science in the coming year.
	www.aas.org /publications/baas/v26n2/aas184/abs/S2402.html (89 words)

	Hubble Heritage
		Trauger is the Principal Investigator for the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope.
		In 1985, WFPC2 was conceived as a wide-field photometric camera to replace the WF/PC originally launched with the telescope in 1990.
		In June 1990, following analysis of the first images from Hubble, he proposed to NASA to correct for Hubble's spherical aberration by refiguring small mirrors within WFPC2, a solution which ultimately delivered fully restored imaging.
	heritage.stsci.edu /2003/14/bio/bio_trauger.html (228 words)

	[No title]
		In order to prepare for changes which might occur to the SNAP detectors after launch, I have gathered information on the performance of several existing space cameras.
		Over the years since it was launched, WFPC2 has suffered from a gradual loss in overall sensitivity.
		Whitmore, Heyer and Casertano, PASP 111, 1559 (1999) Charge Transfer Efficiency of WFPC2.
	spiff.rit.edu /richmond/snap/onorbitqe/onorbitqe.html (1073 words)

	The Space Place :: The Amazing Wide Field and Planetary Camera
		These pictures were actually taken by the Wide Field and Planetary Camera 2 (WFPC2) that flies aboard the Hubble.
		Instead of trying to read newspapers, WFPC2 focuses on the faintest and most far away objects in the universe.
		They include other galaxies, cloudy bubbles of gas from dying stars, and gassy regions that are the nurseries where stars are born.
	spaceplace.jpl.nasa.gov /en/kids/wfpc_fact1.shtml (196 words)

	WFPC2 Imaging of Nearby Ellipticals (Site not responding. Last check: 2007-10-08)
		Perhaps the best examples of merger remnants are the set of ellipticals with kinematically--distinct cores.
		Here we present HST WFPC2 imaging of 14 kinematically-distinct core ellipticals to examine their globular cluster systems.
		In particular, we probe the galaxy central regions, for which we might expect to see the strongest signatures of some formation and destruction processes.
	www.ucolick.org /~brodie/Sages/Web/c4/abstract.html (309 words)

	HSTphot: Photometry for WFPC2 (Site not responding. Last check: 2007-10-08)
		HSTphot is a photometry package specifically designed for use with HST WFPC2 data.
		It uses a library of Tiny Tim PSFs for different locations of the star on the camera, as well as locations of the star's center within the pixel, to center the star and to correct an aperture magnitude.
		HSTphot is optimized for running in undersampled conditions (like WFPC2), and could certainly be modified, given some effort, to other instruments if undersampled conditions are present.
	purcell.as.arizona.edu /hstphot (150 words)

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