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Professional Information
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Welcome to Anton's homepage!
I am a research astrophysicist with the Hubble Space Telescope at the Space
Telescope Science Institute (located in Baltimore, MD, USA), and I have held a research position here since late 1996. Previous experience and education include:
- Postdoctoral research fellowship positions at NASA Goddard Space Flight Center,
the Institut d'Astrophysique de Paris, and Leiden University.
- Ph.D. in astrophysics in 1995, from the Australian National University /
Research School of Astronomy and Astrophysics (formerly Mount Stromlo Observatory),
on the physics of black holes in active galaxies
- B.Sc. (Honours) in physics in 1989, from the University of Adelaide,
South Australia
At the Space Telescope Science Institute, my work includes maintaining the
scientific productivity of the Hubble Space Telescope, and for some years I
was the team lead in charge of one of the imaging cameras onboard Hubble (the
'NICMOS' Near-Infrared Camera and Multi-Object Spectrometer). More recently
I have also been working on the James Webb Space Telescope (the successor
to Hubble, planned for launch in a few years), as well as the Hubble Legacy
Data Archives, and I work on astrophysics research programs on my areas of
interest which include the properties of galaxies and black holes
and their growth over cosmic time.
Research Interests
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My research interests are mostly in extragalactic astrophysics, including:
- Formation of galaxies and black holes in the early universe, and their growth over cosmic time
- Large surveys for galaxies and black holes
- Properties of active and star-forming galaxies
I have also been in charge of creating all the Hubble imaging mosaics, for my science work in various large projects:
- 2000: CDFS (Chandra Deep Field South)
- 2002: GOODS (Great Observatories Origins Deep Survey)
- 2003: UDF (Hubble Ultra Deep Field)
- 2004: COSMOS survey
- 2005: AEGIS (All-sky Extended Groth Strip International Survey)
- 2007: HLA (Hubble Legacy Archive)
- 2009: WFC3/ERS (Hubble Wide Field Camera 3 / Early Release Science)
- 2010: CANDELS (Cosmic Assembly and Near-Infrared Deep Extragalactic Survey)
- 2011: CLASH (Cluster Lensing And Supernova survey with Hubble)
- 2012: UDF12 (Hubble Ultra Deep Field 2012)
- 2012: UV UDF (Ultra-Violet Hubble Ultra Deep Field)
- 2013-16: Hubble Frontier Fields survey
Current research publications (1994 - 2016)
Hubble Frontier Fields 2013-2016 (ongoing)
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I am in charge of the Hubble imaging for the
Hubble Frontier Fields
project, where I am leading the Science Data Products team and have responsibility for all
the calibration, processing, and production of final science-grade mosaic images
of these fields, as well as their public distribution to the community via our
Archive Pages.
The first
Press release,
which took place on 7 January 2014, presents the initial data relase of the
first epoch of the cluster Abell 2744. The cluster acts as a gravitational
`lens' to amplify the distant galaxies behind it, and we are observing this
field to very deep limits (about 28-29th magnitude AB), so the amplification
provided by the cluster therefore helps to reveal galaxies that may be intrinsically
fainter even than those that had been previously discovered in the Ultra Deep Field.
A total of 6 clusters, each with an accompanying `parallel field', are being
observed as part of this program across a wide range of filters with ACS
(F435W, F606W, F814W) and also WFC3/IR (F105W, F125W, F140W, F160W), yielding
a legacy set of multi-wavelength scientific products for probing galaxy evolution
and cluster physics up to the distant universe.
Hubble Ultra Deep Field 2012
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I was in charge of the imaging for the
Hubble Ultra Deep Field 2012
project, where I led the observations and created all the final images.
The
Press release
presents the various images and other details about the program, after the
public data release took place on 12 December 2012. This new image of the
Hubble Ultra Deep Field is the deepest ever image of the sky at these wavelengths.
By combining new data obtained by the UDF12 Team (PI. R. Ellis) with previous
data obtained by the UDF09 Team (PI.: G. illingworth) as well as other Hubble
programs (The CANDELS team, PI.: S. Faber and H. Ferguson, and the Supernova
team, PI.: A. Riess), these new data enable us to use Hubble to probe to
deeper cosmic epochs than ever before.
The overview reference papers for this survey are:
- A. M. Koekemoer et al., 2013, Astrophysical Journal Supplement, 209, 3
- R. S. Ellis et al., 2013, Astrophysical Journal Letters, 763, 7
Hubble Ultra Deep Field 2004
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I was in charge of the imaging for the Hubble Space Telescope / Advanced Camera
for Surveys (HST/ACS) 2004
Hubble Ultra Deep Field (UDF)
project, where my role was to calibrate, combine and analyse the 800 ACS/WFC
exposures to produce a set of final, cleaned "drizzled" images in each of the
four filters.
The
Press release
presents the various images and other details about the program, after the
public data release took place on 9 March 2004.
CANDELS: Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey
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I am responsible for all the Hubble imaging for the
CANDELS
project, where I led the calibration and processing, and created all the final mosaic images.
This project is designed to document the first third of galactic evolution from between redshifts 1.5 and 8,
via deep imaging of more than 250,000 galaxies with WFC3/IR and ACS, as well as discovering Type Ia supernovae
beyond redshift 1.5 in order to establish their accuracy as standard candles for cosmology. The survey targets
five premier multi-wavelength sky regions; each has multi-wavelength data from Spitzer and other facilities
plus extensive spectroscopy of the brighter galaxies. The use of five widely separated fields mitigates cosmic
variance and yields statistically robust and complete samples of galaxies to faint limitsout to redshift 8.
The first
Press release
presents initial discoveries from the program.
The overview reference papers for this survey are:
- N. A. Grogin et al., 2011, Astrophysical Journal Supplement, 197, 35
- A. M. Koekemoer et al., 2011, Astrophysical Journal Supplement, 197, 36
Hubble Wide Field Camera 3 / Early Release Science (WFC3 / ERS)
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I was part of the team for the new Early Release Science Program obtained with
the Hubble Space Telescope / Wide Field Camera 3 (HST/WFC3), which was installed
on Hubble by the Astronauts during Servicing Mission 4 in May 2009. This program
uses the new Wide Field Camera 3 to obtain extensive new, deep near-infrared
data on the GOODS-South Field (part of the "Great Observatories Origins Deep
Survey" / "GOODS" project). The
Press release
presents the various images and other details about the program, after the
public release took place on 5 January 2010.
The Hubble COSMOS Survey
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I was also in charge of combining all the Hubble imaging data for the
COSMOS
project, which used 600 orbits of Hubble time to produce the largest
single mosaic ever obtained with HST (about 2 square degrees, or about
10 times the area of the full moon, and covering about 2 million
galaxies); my science interest in this project is to search for
supermassive black holes in the very early universe.
The overview reference papers for the COSMOS HST data are:
- A. M. Koekemoer et al., 2007, Astrophysical Journal Supplement, 172, 196
- N. Z. Scoville et al., 2007, Astrophysical Journal Supplement, 172, 38
"EXO's" - Extreme X-ray / Optical sources
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This is a new class of galaxies which I discovered in 2004,
that are well detected in deep X-ray studies with the Chandra and
XMM telescopes, but completely undetected at optical wavelengths in deep
observations with Hubble and large ground-based telescopes (VLT, Gemini,
Subaru, Keck etc). They are detected at infrared wavelengths, particularly
with Spitzer in the 3 - 8 micron and 24 micron wavelength bands.
The
Press release
presents the various images and other details about the program, after the
public release took place on 1 June 2004.
The original discovery paper is:
- A. M. Koekemoer et al., 2004, Astrophysical Journal Letters, 600, L123
"MultiDrizzle" - Software for Combining Hubble Imaging Data
- I originally wrote and developed the
MultiDrizzle
software, which uses the "drizzle" software (Fruchter & Hook 2002) to perform automatic
registration, cosmic ray rejection and combination of dithered HST images.
The original paper describing MultiDrizzle is:
- A. M. Koekemoer, A. S. Fruchter, R. Hook, W. Hack,
2002 HST Calibration Workshop, 337
This also served as the foundation for the subsequent "AstroDrizzle" software, which is
now implemented as a successor to it.
A few relevant older publications
- "The COSMOS Survey: Hubble Space Telescope / Advanced Camera for
Surveys (HST/ACS) Observations"
A. M. Koekemoer,
Aussel, H., Calzetti, D., Capak, P., Giavalisco, M., Kneib, J.-P.,
Leauthaud, A., Le Fevre, O., McCracken, H. J., Massey, R., Mobasher, B.,
Rhodes, J., Scoville, N. & Shopbell, P. L.
2007, Astrophysical Journal Supplement, accepted / in press
[Preprint: astro-ph/0703095]
[Full-resolution version: 2007, ApJS 172, 196]
- "Dark matter maps reveal cosmic scaffolding"
R. Massey, Rhodes, J., Ellis, R., Scoville, N., Leauthaud, A.,
Finoguenov, A., Capak, P., Bacon, D., Aussel, H., Kneib, J.-P.,
A. M. Koekemoer,
McCracken, H., Mobasher, B., Pires, S., Refregier, A., Sasaki, S.,
Starck, J.-L., Taniguchi, Y., Taylor, A., Taylor, J.
2007, Nature, 445, 286
- "Redshifts of Emission Line Objects in the Hubble Ultra Deep Field"
C. Xu, Pirzkal, N., Malhotra, S., Rhoads, J. E., Mobasher, B., Daddi, E.,
Gronwall, C., Hathi, N. P., Panagia, N., Ferguson, H. C.,
A. M. Koekemoer,
Kuemmel, M., Moustakas, L. A., Pasquali, A., di Serego Alighieri, S.,
Vernet, J., Walsh, J. R., Windhorst, R., Yan, H.
2007, Astronomical Journal, 134, 169
[Preprint: astro-ph/0701875]
- "The Cosmic Evolution Survey (COSMOS): The morphological content and
enviromental dependence of the galaxy color-magnitude relation at z~0.7"
P. Cassata, Guzzo, L., Franceschini, A., Scoville, N., Capak, P.,
Ellis, R. S.,
A. M. Koekemoer,
McCracken, H. J., Mobasher, B., Renzini, A.,
Ricciardelli, E., Scodeggio, M., Taniguchi, Y., Thompson, D.
2007, Astrophysical Journal Supplement, 172, 270
[Preprint: astro-ph/0701483]
Note:
Links to published refereed papers point directly to PDF files made available by
the relevant journals:
The Astrophysical Journal,
The Astronomical Journal,
as well as scanned Postscript files accessible via the
NASA Astrophysics Data System.
Other Astronomy Sites
Astroweb:
-
-
CDS,
[NRAO,
STScI,
MSSSO,
ST-ECF,
Villafranca,
WWW Virtual Library]
Other Links - Christianity / Faith and Science
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- Science and Faith - Discussing Astronomy Research with Religious Audiences
(invited talk presented at American Astronomical Society 209th Meeting, 9 Jan 2007, Seattle, WA --
Special Session 174,
Talk #174.04)
[printable version]
- Letter from Pope John Paul II on Faith and Science
- Christians in Astronomy/Astrophysics (chr-astro)
- American Scientific Affiliation
- Christians in Science
Some of my other related research webpages
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- Hubble Space Telescope staff webpage
Anton Koekemoer
- Linked-in member profile Anton Koekemoer
Anton Koekemoer
- IAU member webpage Anton Koekemoer
- Google-Scholar page Anton Koekemoer
- Google homepage Anton Koekemoer
- Google+ page Anton Koekemoer
- About.me page Anton Koekemoer
- Scopus page Anton Koekemoer
- VoxCharta page Anton Koekemoer
- OrcID web page Anton Koekemoer
- ResearcherID page Anton Koekemoer
- ResearchGate page Anton Koekemoer
- Academia.edu page Anton Koekemoer
- MicroSoft Academic page Anton Koekemoer
Anton Koekemoer
Anton Koekemoer
Anton Koekemoer
Anton Koekemoer
Jochem Koekemoer
Disclaimer: Any views expressed on this webpage are strictly personal and are not
intended in any way to necessarily represent those of, or be endorsed by, any other entity or organization.