Andrew J. Bunker

Probing $\sim L_{*}$ Lyman-break Galaxies at $z\approx 7$ in GOODS-South with WFC3 on HST (2009)

Wilkins, Stephen M., Bunker, Andrew J., Ellis, Richard S., Stark, Daniel, Stanway, Elizabeth R., Chiu, Kuenley, ...

We analyse recently acquired near-infrared Hubble Space Telescope imaging of the GOODS-South field to search for star forming galaxies at z~7.0. By comparing WFC 3 0.98 micron Y-band images with ACS...

GRB 080503: implications of a naked short gamma-ray burst dominated by extended emission (2009)

Perley, D. A., Metzger, B. D., Granot, J., Butler, N. R., Sakamoto, T., Ramirez-Ruiz, Enrico, ...

We report on observations of GRB 080503, a short gamma-ray burst (GRB) with very bright extended emission (about 30 times the gamma-ray fluence of the initial spike) in conjunction with a thorough...

GRB 080503: implications of a naked short gamma-ray burst dominated by extended emission (2009)

Perley, D. A., Metzger, B. D., Granot, J., Butler, N. R., Sakamoto, T., Ramirez-Ruiz, Enrico, ...

We report on observations of GRB 080503, a short gamma-ray burst (GRB) with very bright extended emission (about 30 times the gamma-ray fluence of the initial spike) in conjunction with a thorough...

SERENDIPITOUSLY DETECTED GALAXIES IN THE HUBBLE DEEP FIELD1 (2007)

Steve Dawson, Daniel Stern, Andrew J. Bunker, Hyron Spinrad, Arjun Dey

We present a catalog of 74 galaxies detected serendipitously during a campaign of spectroscopic observations of the Hubble Deep Field North (HDF) and its environs. Among the identied objects are ve...

The stellar mass density at z ~6 from Spitzer imaging of i'-drop galaxies (2007)

Eyles, Laurence P., Bunker, Andrew J., Ellis, Richard S., Lacy, Mark, Stanway, Elizabeth R., Stark, Daniel P., ...

We measure the ages, stellar masses, and star formation histories of z ~6 galaxies, observed within 1 Gyr of the big bang. We use imaging from the Hubble Space Telescope (HST) and the Spitzer Space...

The GLARE Survey II. Faint z=6 Ly-alpha Line Emitters in the HUDF (2007)

Stanway, Elizabeth R, Bunker, Andrew J, Glazebrook, Karl, Abraham, Roberto G, Rhoads, James, Malhotra, Sangeeta, ...

The galaxy population at z~6 has been the subject of intense study in recent years, culminating in the Hubble Ultra Deep Field (HUDF) -- the deepest imaging survey yet. A large number of high...

The GLARE Survey II : faint z approximate to 6 Ly alpha line emitters in the HUDF (2007)

Stanway, Elizabeth R., Bunker, Andrew J., Glazebrook, Karl, Abraham, Roberto G., Rhoads, James, Malhotra, Sangeeta, ...

The galaxy population at z approximate to 6 has been the subject of intense study in recent years, culminating in the Hubble Ultra Deep Field (HUDF) - the deepest imaging survey yet. A large number...

The GLARE Survey II : faint z approximate to 6 Ly alpha line emitters in the HUDF (2007)

Stanway, Elizabeth R., Bunker, Andrew J., Glazebrook, Karl, Abraham, Roberto G., Rhoads, James, Malhotra, Sangeeta, ...

The galaxy population at z approximate to 6 has been the subject of intense study in recent years, culminating in the Hubble Ultra Deep Field (HUDF) - the deepest imaging survey yet. A large number...

The GLARE Survey II : faint z approximate to 6 Ly alpha line emitters in the HUDF (2007)

Stanway, Elizabeth R., Bunker, Andrew J., Glazebrook, Karl, Abraham, Roberto G., Rhoads, James, Malhotra, Sangeeta, ...

The galaxy population at z approximate to 6 has been the subject of intense study in recent years, culminating in the Hubble Ultra Deep Field (HUDF) - the deepest imaging survey yet. A large number...

The GLARE Survey II : faint z approximate to 6 Ly alpha line emitters in the HUDF (2007)

Stanway, Elizabeth R., Bunker, Andrew J., Glazebrook, Karl, Abraham, Roberto G., Rhoads, James, Malhotra, Sangeeta, ...

The galaxy population at z approximate to 6 has been the subject of intense study in recent years, culminating in the Hubble Ultra Deep Field (HUDF) - the deepest imaging survey yet. A large number...

The GLARE Survey II : faint z approximate to 6 Ly alpha line emitters in the HUDF (2007)

Stanway, Elizabeth R., Bunker, Andrew J., Glazebrook, Karl, Abraham, Roberto G., Rhoads, James, Malhotra, Sangeeta, ...

The galaxy population at z approximate to 6 has been the subject of intense study in recent years, culminating in the Hubble Ultra Deep Field (HUDF) - the deepest imaging survey yet. A large number...

Brown dwarfs and high-redshift quasars in the UKIDSS? Unlikely neighbors in the infrared (2007)

Chiu, Kuenley, Bunker, Andrew J., Glazebrook, Karl, Jiang, Linhua, Fan, Xiaohui, Fan, Xiaohui, ...

Over the ~ 5 years of its full operations, the SDSS rapidly broke high redshift quasar and brown dwarf discovery barriers by exploiting the advantages of the near-infrared/optical z filter, combined...

A Matched Catalogue i-dropout galaxies at z~6 in the Hubble Ultra Deep Field (2004)

Bunker, Andrew J, Stanway, Elizabeth R.

A recent preprint by Yan & Windhorst (astro-ph/0407493) independently repeats our selection of candidate z~6 galaxies in the Hubble Ultra Deep Field (astro-ph/0403223). The agreement of this...

Three Ly alpha emitters at z ≈ 6: early GMOS/Gemini data from the GLARE project (2004)

Stanway, Elizabeth R., Glazebrook, Karl, Bunker, Andrew J., Abraham, R. G., Hook, Isobel, Rhoads, James, ...

We report spectroscopic detection of three z ∼ 6 Lyα-emitting galaxies, in the vicinity of the Hubble Ultra Deep Field, from the early data of the Gemini Lyman Alpha at Reionisation Era...

Three Ly alpha emitters at z ≈ 6: early GMOS/Gemini data from the GLARE project (2004)

Stanway, Elizabeth R., Glazebrook, Karl, Bunker, Andrew J., Abraham, R. G., Hook, Isobel, Rhoads, James, ...

We report spectroscopic detection of three z ∼ 6 Lyα-emitting galaxies, in the vicinity of the Hubble Ultra Deep Field, from the early data of the Gemini Lyman Alpha at Reionisation Era (GLARE)...

Three Lyman-alpha Emitters at z approx 6: Early GMOS/Gemini Data from the GLARE Project (2003)

Stanway, Elizabeth R., Glazebrook, Karl, Bunker, Andrew J., Abraham, Roberto G., Hook, Isobel, Rhoads, James, ...

We report spectroscopic detection of three z~6 Lyman-alpha emitting galaxies, in the vicinity of the Hubble Ultra Deep Field, from the early data of the Gemini Lyman-$\alpha$ at Reionisation Era...

Gemini-South + FLAMINGOS Demonstration Science: Near-Infrared Spectroscopy of the z=5.77 Quasar SDSS J083643.85+005453.3 (2003)

Stern, Daniel, Hall, Patrick B., Barrientos, L. Felipe, Bunker, Andrew J., Elston, Richard, Ledlow, M. J., ...

We report an infrared 1-1.8 micron (J+H-bands), low-resolution (R=450) spectrogram of the highest-redshift radio-loud quasar currently known, SDSS J083643.85+005453.3, obtained during the...

A star-forming galaxy at z=5.78 in the Chandra Deep Field South (2003)

Bunker, Andrew J., Stanway, Elizabeth R., Ellis, Richard S., McMahon, Richard G., McCarthy, Patrick J.

We report the discovery of a luminous z=5.78 star-forming galaxy in the Chandra Deep Field South. This galaxy was selected as an `i-drop' from the GOODS public survey imaging with HST/ACS (object 3...

A sample of 6C radio sources designed to find objects at redshift > 4: II --- spectrophotometry and emission line properties (2001)

Jarvis, Matt J., Rawlings, Steve, Lacy, Mark, Blundell, Katherine M., Bunker, Andrew J., Eales, Steve, ...

(Abridged) This is the second in a series of three papers which present and interpret basic observational data on the 6C* 151-MHz radio sample: a low-frequency selected sample which exploits...

A sample of 6C radio sources designed to find objects at redshift > 4: III --- imaging and the radio galaxy K-z relation (2001)

Jarvis, Matt J., Rawlings, Steve, Eales, Steve, Blundell, Katherine M., Bunker, Andrew J., Croft, Steve, ...

In this paper, the third and final of a series, we present complete K-band imaging and some complementary I-band imaging of the filtered 6C* sample. We find no systematic differences between the K-z...

Serendipitously Detected Galaxies in the Hubble Deep Field (2001)

Dawson, Steve, Stern, Daniel, Bunker, Andrew J., Spinrad, Hyron, Dey, Arjun

We present a catalog of 74 galaxies detected serendipitously during a campaign of spectroscopic observations of the Hubble Deep Field North (HDF) and its environs. Among the identified objects are...

The Evolution of the Stellar Hosts of Radio Galaxies (2000)

Lacy, Mark, Bunker, Andrew J., Ridgway, Susan E.

We present new near-infrared images of z>0.8 radio galaxies from the flux-limited 7C-III sample of radio sources for which we have recently obtained almost complete spectroscopic redshifts. The 7C...

Discovery of a Color-Selected Quasar at z=5.50 (2000)

Stern, Daniel, Spinrad, Hyron, Eisenhardt, Peter, Bunker, Andrew J., Dawson, Steve, Stanford, S. A., ...

We present observations of RD J030117+002025, a quasar at z=5.50 discovered from deep, multi-color, ground-based observations covering 74 square arcmin. This is the most distant quasar or AGN...

One-Line Redshifts and Searches for High-Redshift Lyman-Alpha Emission (2000)

Stern, Daniel, Bunker, Andrew J., Spinrad, Hyron, Dey, Arjun

We report the serendipitous discovery of two objects close in projection with fairly strong emission lines at long wavelength (~9190 A). One (A) seems not to be hosted by any galaxy brighter than...

A Serendipitous Search for High-Redshift Lyman alpha Emission: Two Primeval Galaxy Candidates at z~3 (2000)

Manning, Curtis, Stern, Daniel, Spinrad, Hyron, Bunker, Andrew J.

In the course of our ongoing search for serendipitous high-redshift Lyman alpha (LyA) Emissionin deep archival Keck spectra, we discovered two very high equivalent width (W_{obs} ~ 450A, 2-sigma) LyA...

The Deepest Spectrum of the Universe? Constraints on the Lyman Continuum Background at High Redshift (1999)

Bunker, Andrew J., Marleau, Francine R., Graham, James R.

We describe an ongoing experiment to search for the meta-galactic Lyman-continuum background at z~2-3. We are obtaining one of the deepest optical spectra ever, using LRIS/Keck-II to search for the...

A Serendipitous Search for Hy-Redshift Ly$Alpha$ Emission: A Case Study of Two Sources at $z\simeq 3$ (1999)

Manning, Curtis, Stern, Daniel, Spinrad, Hyron, Bunker, Andrew J.

In the course of our on-going search for serendipitous high-redshift LyA emission in deep archival Keck spectra, we discovered two LyA emission line candidates in a moderate dispersion...

Resolving the Stellar Populations in a z=4 Lensed Galaxy (1999)

Bunker, Andrew J., Moustakas, Leonidas A., Davis, Marc

We present deep near-infrared Keck/NIRC imaging of a recently-discovered z=4.04 galaxy (Frye & Broadhurst 1998). This is lensed by the rich foreground cluster Abell~2390 (z~0.23) into...

Galaxy Morphology in the GTO-NICMOS Northern Hubble Deep Field (1999)

Bunker, Andrew J.

The increased incidence of morphologically peculiar galaxies at faint magnitudes in the optical could be attributable either to "morphological k-corrections" (the change in appearance when viewing...

Limits on the star formation rates of z>2 damped Ly-alpha systems from H-alpha spectroscopy (1999)

Bunker, Andrew J., Warren, Stephen J., Clements, D. L., Williger, Gerard M., Hewett, Paul C.

We present the results of a long-slit K-band spectroscopic search for H-alpha emission from eight damped Ly-alpha absorbers (DLAs) at z>2 with the goal of measuring the star-formation rates in these...

Optical spectroscopy of two overlapping, flux-density-limited samples of radio sources in the North Ecliptic Cap, selected at 38 MHz and 151 MHz (1999)

Lacy, Mark, Rawlings, Steve, Hill, Gary J., Bunker, Andrew J., Ridgway, Susan E., Stern, Daniel

We present the results of optical spectroscopy of two flux-density-limited samples of radio sources selected at frequencies of 38 and 151 MHz in the same region around the North Ecliptic Cap, the...

Seeking the Ultraviolet Ionizing Background at z~3 with the Keck Telescope (1998)

Bunker, Andrew J., Marleau, Francine R., Graham, James R.

We describe the initial results of a deep long-slit emission line search for redshifted (2.7

Limits on the star formation rates of z>2 damped Ly-alpha systems from H-alpha spectroscopy (1998)

Bunker, Andrew J., Warren, Stephen J., Clements, D. L., Williger, Gerard M., Hewett, P. C.

We present the results of a long-slit K-band spectroscopic search with CGS4 on UKIRT for H-alpha emission from the objects responsible for high-redshift (z > 2) damped Ly-alpha absorption systems....

Optical and infrared investigation towards the z=3.8 quasar pair PC1643+4631A&B (1996)

Saunders, Richard, Baker, Joanne C., Bremer, Malcolm N., Bunker, Andrew J., Cotter, Garret, Eales, Steve, ...

In a companion paper (Paper I: Jones et al. 1996) we report the discovery of a cosmic microwave background decrement, indicative of a distant cluster with mass ~10^{15} solar masses, towards the...