Search

Your search keyword '"Ogle, Patrick"' showing total 149 results
Start Over Author "Ogle, Patrick"

Refine your results

149 results on '"Ogle, Patrick"'

101. Searching for AGN Outflows: Spatially Resolved Chandra HETG Spectroscopy of the NLR Ionization Cone in NGC 1068

Author

delete, Kavli Institute for Astrophysics and Space Research, Canizares, Claude R., Evans, Daniel A., Marshall, Herman Lee, Nowak, Michael A., Longinotti, Anna Lia, Dewey, Dan, Schulz, Norbert S., Noble, Mike S., Houck, John C., Ogle, Patrick M., Bianchi, Stefano, Guainazzi, M., delete, Kavli Institute for Astrophysics and Space Research, Canizares, Claude R., Evans, Daniel A., Marshall, Herman Lee, Nowak, Michael A., Longinotti, Anna Lia, Dewey, Dan, Schulz, Norbert S., Noble, Mike S., Houck, John C., Ogle, Patrick M., Bianchi, Stefano, and Guainazzi, M.

Abstract

We present initial results from a new 440-ks Chandra HETG GTO observation of the canonical Seyfert 2 galaxy NGC 1068. The proximity of NGC 1068, together with Chandra’s superb spatial and spectral resolution, allow an unprecedented view of its nucleus and circumnuclear NLR. We perform the first spatially resolved high-resolution X-ray spectroscopy of the ‘ionization cone’ in any AGN, and use the sensitive line diagnostics offered by the HETG to measure the ionization state, density, and temperature at discrete points along the ionized NLR. We argue that the NLR takes the form of outflowing photoionized gas, rather than gas that has been collisionally ionized by the small-scale radio jet in NGC 1068. We investigate evidence for any velocity gradients in the outflow, and describe our next steps in modeling the spatially resolved spectra as a function of distance from the nucleus.

Published
2012

102. Spatially Resolved Chandra HETG Spectroscopy of the NLR Ionization Cone in NGC 1068

Author

Kavli Institute for Astrophysics and Space Research, Canizares, Claude R., Evans, Daniel A., Marshall, Herman Lee, Nowak, Michael A., Dewey, Dan, Schulz, Norbert S., Noble, Mike S., Houck, John C., Ogle, Patrick M., Bianchi, S., Guainazzi, M., Kavli Institute for Astrophysics and Space Research, Canizares, Claude R., Evans, Daniel A., Marshall, Herman Lee, Nowak, Michael A., Dewey, Dan, Schulz, Norbert S., Noble, Mike S., Houck, John C., Ogle, Patrick M., Bianchi, S., and Guainazzi, M.

Abstract

We present initial results from a new 440-ks Chandra HETG GTO observation of the canonical Seyfert 2 galaxy NGC 1068. The proximity of NGC 1068, together with Chandra's superb spatial and spectral resolution, allow an unprecedented view of its nucleus and circumnuclear NLR. We perform the first spatially resolved high-resolution X-ray spectroscopy of the `ionization cone' in any AGN, and use the sensitive line diagnostics offered by the HETG to measure the ionization state, density, and temperature at discrete points along the ionized NLR. We argue that the NLR takes the form of outflowing photoionized gas, rather than gas that has been collisionally ionized by the small-scale radio jet in NGC 1068. We investigate evidence for any velocity gradients in the outflow, and describe our next steps in modeling the spatially resolved spectra as a function of distance from the nucleus.

Published
2011

103. Spatially Resolved Chandra HETG Spectroscopy of the NLR Ionization Cone in NGC 1068

Author

MIT Kavli Institute for Astrophysics and Space Research, Canizares, Claude R., Evans, Daniel A., Marshall, Herman Lee, Nowak, Michael A., Dewey, Dan, Schulz, Norbert S., Noble, Mike S., Houck, John C., Ogle, Patrick M., Bianchi, S., Guainazzi, M., Marshall, Herman, MIT Kavli Institute for Astrophysics and Space Research, Canizares, Claude R., Evans, Daniel A., Marshall, Herman Lee, Nowak, Michael A., Dewey, Dan, Schulz, Norbert S., Noble, Mike S., Houck, John C., Ogle, Patrick M., Bianchi, S., Guainazzi, M., and Marshall, Herman

Abstract

We present initial results from a new 440-ks Chandra HETG GTO observation of the canonical Seyfert 2 galaxy NGC 1068. The proximity of NGC 1068, together with Chandra's superb spatial and spectral resolution, allow an unprecedented view of its nucleus and circumnuclear NLR. We perform the first spatially resolved high-resolution X-ray spectroscopy of the `ionization cone' in any AGN, and use the sensitive line diagnostics offered by the HETG to measure the ionization state, density, and temperature at discrete points along the ionized NLR. We argue that the NLR takes the form of outflowing photoionized gas, rather than gas that has been collisionally ionized by the small-scale radio jet in NGC 1068. We investigate evidence for any velocity gradients in the outflow, and describe our next steps in modeling the spatially resolved spectra as a function of distance from the nucleus.

Published
2011

104. REVEALING THE HEAVILY OBSCURED ACTIVE GALACTIC NUCLEUS POPULATION OF HIGH-REDSHIFT 3CRR SOURCES WITHCHANDRAX-RAY OBSERVATIONS

Author

Wilkes, Belinda J., primary, Kuraszkiewicz, Joanna, additional, Haas, Martin, additional, Barthel, Peter, additional, Leipski, Christian, additional, Willner, S. P., additional, Worrall, D. M., additional, Birkinshaw, Mark, additional, Antonucci, Robert, additional, Ashby, M. L. N., additional, Chini, Rolf, additional, Fazio, G. G., additional, Lawrence, Charles, additional, Ogle, Patrick, additional, and Schulz, Bernhard, additional

Published
2013
Full Text
View/download PDF

105. THENUCLEAR SPECTROSCOPIC TELESCOPE ARRAY(NuSTAR) HIGH-ENERGY X-RAY MISSION

Author

Harrison, Fiona A., primary, Craig, William W., additional, Christensen, Finn E., additional, Hailey, Charles J., additional, Zhang, William W., additional, Boggs, Steven E., additional, Stern, Daniel, additional, Cook, W. Rick, additional, Forster, Karl, additional, Giommi, Paolo, additional, Grefenstette, Brian W., additional, Kim, Yunjin, additional, Kitaguchi, Takao, additional, Koglin, Jason E., additional, Madsen, Kristin K., additional, Mao, Peter H., additional, Miyasaka, Hiromasa, additional, Mori, Kaya, additional, Perri, Matteo, additional, Pivovaroff, Michael J., additional, Puccetti, Simonetta, additional, Rana, Vikram R., additional, Westergaard, Niels J., additional, Willis, Jason, additional, Zoglauer, Andreas, additional, An, Hongjun, additional, Bachetti, Matteo, additional, Barrière, Nicolas M., additional, Bellm, Eric C., additional, Bhalerao, Varun, additional, Brejnholt, Nicolai F., additional, Fuerst, Felix, additional, Liebe, Carl C., additional, Markwardt, Craig B., additional, Nynka, Melania, additional, Vogel, Julia K., additional, Walton, Dominic J., additional, Wik, Daniel R., additional, Alexander, David M., additional, Cominsky, Lynn R., additional, Hornschemeier, Ann E., additional, Hornstrup, Allan, additional, Kaspi, Victoria M., additional, Madejski, Greg M., additional, Matt, Giorgio, additional, Molendi, Silvano, additional, Smith, David M., additional, Tomsick, John A., additional, Ajello, Marco, additional, Ballantyne, David R., additional, Baloković, Mislav, additional, Barret, Didier, additional, Bauer, Franz E., additional, Blandford, Roger D., additional, Brandt, W. Niel, additional, Brenneman, Laura W., additional, Chiang, James, additional, Chakrabarty, Deepto, additional, Chenevez, Jerome, additional, Comastri, Andrea, additional, Dufour, Francois, additional, Elvis, Martin, additional, Fabian, Andrew C., additional, Farrah, Duncan, additional, Fryer, Chris L., additional, Gotthelf, Eric V., additional, Grindlay, Jonathan E., additional, Helfand, David J., additional, Krivonos, Roman, additional, Meier, David L., additional, Miller, Jon M., additional, Natalucci, Lorenzo, additional, Ogle, Patrick, additional, Ofek, Eran O., additional, Ptak, Andrew, additional, Reynolds, Stephen P., additional, Rigby, Jane R., additional, Tagliaferri, Gianpiero, additional, Thorsett, Stephen E., additional, Treister, Ezequiel, additional, and Urry, C. Megan, additional

Published
2013
Full Text
View/download PDF

107. HUBBLE SPACE TELESCOPE ULTRAVIOLET SPECTROSCOPY OF 14 LOW-REDSHIFT QUASARS

Author

Ganguly, Rajib, Brotherton, Michael S., Arav, Nahum, Heap, Sara R., Wisotzki, Lutz, Aldcroft, Thomas L., Alloin, Danielle, Behar, Ehud, Canalizo, Gabriela, Crenshaw, D. Michael, De Kool, Martijn, Chambers, Kenneth, Cecil, Gerald, Chatzichristou, Eleni, Everett, John, Gabel, Jack R., Gaskell, C. Martin, Galliano, Emmanuel, Green, Richard F., Hall, Patrick B., Hines, Dean C., Junkkarinen, Vesa T., Kaastra, Jelle S., Kaiser, Mary Elizabeth, Kazanas, Demosthenes, Konigl, Arieh, Korista, Kirk T., Kriss, Gerard A., Laor, Ari, Leighly, Karen M., Mathur, Smita, Ogle, Patrick, Proga, Daniel, Sabra, Bassem, Sivron, Ran, Snedden, Stephanie A., Telfer, Randal, Vestergaard, Marianne, Ganguly, Rajib, Brotherton, Michael S., Arav, Nahum, Heap, Sara R., Wisotzki, Lutz, Aldcroft, Thomas L., Alloin, Danielle, Behar, Ehud, Canalizo, Gabriela, Crenshaw, D. Michael, De Kool, Martijn, Chambers, Kenneth, Cecil, Gerald, Chatzichristou, Eleni, Everett, John, Gabel, Jack R., Gaskell, C. Martin, Galliano, Emmanuel, Green, Richard F., Hall, Patrick B., Hines, Dean C., Junkkarinen, Vesa T., Kaastra, Jelle S., Kaiser, Mary Elizabeth, Kazanas, Demosthenes, Konigl, Arieh, Korista, Kirk T., Kriss, Gerard A., Laor, Ari, Leighly, Karen M., Mathur, Smita, Ogle, Patrick, Proga, Daniel, Sabra, Bassem, Sivron, Ran, Snedden, Stephanie A., Telfer, Randal, and Vestergaard, Marianne

Abstract

We present low-resolution ultraviolet spectra of 14 low-redshift (zem ≤ 0:8) quasars observed with the Hubble Space Telescope STIS as part of a Snapshot project to understand the relationship between quasar outflows and luminosity. By design, all observations cover the C iv emission line. Ten of the quasars are from the Hamburg-ESO catalog, three are from the Palomar-Green catalog, and one is from the Parkes catalog. The sample contains a few interesting quasars, including two broad absorption line (BAL) quasars (HE 0143-3535 and HE 0436-2614), one quasar with a mini-BAL (HE 1105-0746), and one quasar with associated narrow absorption (HE 0409-5004). These BAL quasars are among the brightest known (although not the most luminous) since they lie at zem < 0.8. We compare the properties of these BAL quasars to the zem < 0.5 Palomar-Green and zem > 1.4 Large Bright Quasar Survey samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the ν ~ L0.62 relation derived by Laor & Brandt (2002). Another quasar, HE 0441-2826, contains extremely weak emission lines, and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG 1407+265, SDSS J1136+0242, and PKS 1004+13, for which several possible explanations have been entertained.

Published
2007

108. Optimal Point-Source Extraction for Spitzer IRS Spectra

Author

Shaw, R. A., Hill, F., Bell, D. J., Narron, Robert, Ogle, Patrick, Laher, Russ R., Shaw, R. A., Hill, F., Bell, D. J., Narron, Robert, Ogle, Patrick, and Laher, Russ R.

Abstract

A new optimal-extraction technique has been developed for deriving point-source spectra from data taken by the Infrared Spectrograph (IRS) on-board the Spitzer Space Telescope. The new technique gives improvements of up to a factor of two in the signal-to-noise ratio (S/N) for faint (< 10 mJy) sources, corresponding to an effective quadrupling of the exposure time. Regular extraction consists of an even-weighted summing of pixel values at the same wavelength. Optimal extraction weights each pixel by its S/N, estimated using the spatial profile of a bright calibration star and data uncertainties. Additionally, the optimal-extraction calculations are performed in “rectified” space, and so a natural by-product of the processing is a useful output file containing the rectified image. The optimal-extraction technique is unsuitable for extended sources and best only for point sources.

Published
2007

109. Spitzer reveals hidden quasar nuclei in some powerful fr II radio galaxies

Author

Ogle, Patrick, Whysong, David, Antonucci, Robert, Ogle, Patrick, Whysong, David, and Antonucci, Robert

Abstract

We present a Spitzer mid-infrared survey of 42 Fanaroff-Riley class II radio galaxies and quasars from the 3CRR catalog at redshift z < 1. All of the quasars and 45% ± 12% of the narrow-line radio galaxies have a mid-IR luminosity of vLv(15µm) > 8 × 10 to the 43rd ergs s^-1, indicating strong thermal emission from hot dust in the active galactic nucleus. Our results demonstrate the power of Spitzer to unveil dust-obscured quasars. The ratio of "mid-IR luminous" narrow-line radio galaxies to quasars indicates a mean dust covering fraction of 0.56 ± 0.15, assuming relatively isotropic emission. We analyze Spitzer spectra of the 14 mid-IR luminous narrow-line radio galaxies thought to host hidden quasar nuclei. Dust temperatures of 210–660 K are estimated from single-temperature blackbody fits to the low- and high-frequency ends of the mid-IR bump. Most of the mid-IR luminous radio galaxies have a 9.7 µm silicate absorption trough with optical depth <0.2, attributed to dust in a molecular torus. Forbidden emission lines from high-ionization oxygen, neon, and sulfur indicate a source of far-UV photons in the hidden nucleus. However, we find that the other 55% ± 13% of narrow-line FR II radio galaxies are weak at 15µm, contrary to single-population unification schemes. Most of these galaxies are also weak at 30µm. Mid-IR weak radio galaxies may constitute a separate population of nonthermal, jet-dominated sources with low accretion power.

Published
2006

110. CHANDRAX-RAY OBSERVATIONS OF THE REDSHIFT 1.53 RADIO-LOUD QUASAR 3C 270.1

Author

Wilkes, Belinda J., primary, Lal, Dharam V., additional, Worrall, D. M., additional, Birkinshaw, Mark, additional, Haas, Martin, additional, Willner, S. P., additional, Antonucci, Robert, additional, Ashby, M. L. N., additional, Avara, Mark, additional, Barthel, Peter, additional, Chini, Rolf, additional, Fazio, G. G., additional, Hardcastle, Martin, additional, Lawrence, Charles, additional, Leipski, Christian, additional, Ogle, Patrick, additional, and Schulz, Bernhard, additional

Published
2012
Full Text
View/download PDF

112. Clever strategies can take you a long way

Author

Ogle, Patrick

Subjects
General interest, News, opinion and commentary
Abstract

Byline: Patrick Ogle For some, traveling cheap is an art form. For others, it's a necessity. Reconciling wanderlust with a lack of funding takes a little creativity _ but it [...]

Published
2005

113. TheSpitzerSurvey of Stellar Structure in Galaxies

Author

Sheth, Kartik, primary, Regan, Michael, additional, Hinz, Joannah L., additional, de Paz, Armando Gil, additional, Menéndez-Delmestre, Karín, additional, Muñoz-Mateos, Juan-Carlos, additional, Seibert, Mark, additional, Kim, Taehyun, additional, Laurikainen, Eija, additional, Salo, Heikki, additional, Gadotti, Dimitri A., additional, Laine, Jarkko, additional, Mizusawa, Trisha, additional, Armus, Lee, additional, Athanassoula, E., additional, Bosma, Albert, additional, Buta, Ronald J., additional, Capak, Peter, additional, Jarrett, Thomas H., additional, Elmegreen, Debra M., additional, Elmegreen, Bruce G., additional, Knapen, Johan H., additional, Koda, Jin, additional, Helou, George, additional, Ho, Luis C., additional, Madore, Barry F., additional, Masters, Karen L., additional, Mobasher, Bahram, additional, Ogle, Patrick, additional, Peng, Chien Y., additional, Schinnerer, Eva, additional, Surace, Jason A., additional, Zaritsky, Dennis, additional, Comerón, Sébastien, additional, de Swardt, Bonita, additional, Meidt, Sharon E., additional, Kasliwal, Mansi, additional, and Aravena, Manuel, additional

Published
2010
Full Text
View/download PDF

118. Hubble Space TelescopeUltraviolet Spectroscopy of 14 Low-Redshift Quasars

Author

Ganguly, Rajib, primary, Brotherton, Michael S., additional, Arav, Nahum, additional, Heap, Sara R., additional, Wisotzki, Lutz, additional, Aldcroft, Thomas L., additional, Alloin, Danielle, additional, Behar, Ehud, additional, Canalizo, Gabriela, additional, Crenshaw, D. Michael, additional, de Kool, Martijn, additional, Chambers, Kenneth, additional, Cecil, Gerald, additional, Chatzichristou, Eleni, additional, Everett, John, additional, Gabel, Jack, additional, Gaskell, C. Martin, additional, Galliano, Emmanuel, additional, Green, Richard F., additional, Hall, Patrick B., additional, Hines, Dean C., additional, Junkkarinen, Vesa T., additional, Kaastra, Jelle S., additional, Kaiser, Mary Elizabeth, additional, Kazanas, Demosthenes, additional, Konigl, Arieh, additional, Korista, Kirk T., additional, Kriss, Gerard A., additional, Laor, Ari, additional, Leighly, Karen M., additional, Mathur, Smita, additional, Ogle, Patrick, additional, Proga, Daniel, additional, Sabra, Bassem, additional, Sivron, Ran, additional, Snedden, Stephanie, additional, Telfer, Randal, additional, and Vestergaard, Marianne, additional

Published
2007
Full Text
View/download PDF

121. Intrinsic Absorption in the Spectrum of NGC 7469: SimultaneousChandra,FUSE, and STIS Observations

Author

Scott, Jennifer E., primary, Kriss, Gerard A., additional, Lee, Julia C., additional, Quijano, Jessica Kim, additional, Brotherton, Michael, additional, Canizares, Claude R., additional, Green, Richard F., additional, Hutchings, John, additional, Kaiser, Mary Elizabeth, additional, Marshall, Herman, additional, Oegerle, William, additional, Ogle, Patrick, additional, and Zheng, Wei, additional

Published
2005
Full Text
View/download PDF

122. Intrinsic Absorption in the Spectrum of Markarian 279: Simultaneous Chandra , FUSE , and STIS Observations

Author

Scott, Jennifer E., primary, Kriss, Gerard A., additional, Lee, Julia C., additional, Arav, Nahum, additional, Ogle, Patrick, additional, Roraback, Kenneth, additional, Weaver, Kimberly, additional, Alexander, Tal, additional, Brotherton, Michael, additional, Green, Richard F., additional, Hutchings, John, additional, Kaiser, Mary Elizabeth, additional, Marshall, Herman, additional, Oegerle, William, additional, and Zheng, Wei, additional

Published
2004
Full Text
View/download PDF

126. A buried treasure trapped in a mystery

Author

Ogle, Patrick

Abstract

Byline: Patrick Ogle 'Shadow Divers' by Robert Kurson; Random ($26.95) ___ Robert Kurson's 'Shadow Divers' is an adventure, a tragedy and a glimpse at the devotion and work it takes […]

Published
2004

127. Along the Fakahatchee Strand

Author

Ogle, Patrick

Abstract

Byline: Patrick Ogle A trip to the Fakahatchee Strand can be an afternoon stop or a weeklong adventure. It can be a taxing hike or a leisurely diversion. This is […]

Published
2004

128. Key West is a sunny, sandy haven for singer/songwriters

Author

Ogle, Patrick

Abstract

Byline: Patrick Ogle KEY WEST, Fla. _ For a small city, Key West seems to have a tremendous number of bars. Not a terribly shocking statement. Even less shocking is […]

Published
2004

129. Get the skinny on fat-free labels

Author

Ogle, Patrick

Abstract

Byline: Patrick Ogle QUESTION: Are foods sold as "fat-free" _ milk, cream cheese, sour cream, etc. _ truly fat-free? Are fat substitutes potentially harmful? _ Walter A. Lavigne Coconut Grove, […]

Published
2004

133. Chicago raises the bar to a world-class height

Author

Ogle, Patrick

Subjects
Chicago, Illinois
Abstract

CHICAGO _ Sometime after the Chicago Cubs won the World Series in 1908, a man with a goat attempted to enter Wrigley Field. When he wasn't allowed in, he purportedly […]

Published
2002

134. Internet offers some solutions for making mail safe

Author

Dorschner, John and Ogle, Patrick

Abstract

MIAMI _ Via e-mail and news stories, advice rocketed around the country Thursday about simple, surefire ways of making your mail safe from deadly anthrax spores: Just iron your mail. […]

Published
2001

135. REVEALING THE HEAVILY OBSCURED ACTIVE GALACTIC NUCLEUS POPULATION OF HIGH-REDSHIFT 3CRR SOURCES WITH CHANDRA X-RAY OBSERVATIONS.

Author

WILKES, BELINDA J., KURASZKIEWICZ, JOANNA, HAAS, MARTIN, BARTHEL, PETER, LEIPSKI, CHRISTIAN, WILLNER, S. P., WORRALL, D. M., BIRKINSHAW, MARK, ANTONUCCI, ROBERT, ASHBY, M. L. N., CHINI, ROLF, FAZIO, G. G., LAWRENCE, CHARLES, OGLE, PATRICK, and SCHULZ, BERNHARD

Subjects
ACTIVE galactic nuclei, GALACTIC nuclei, RADIO sources (Astronomy), ACTIVE galaxies, REDSHIFT, ASTRONOMY
Abstract

Chandra observations of a complete, flux-limited sample of 38 high-redshift (1 < z < 2), low-frequency-selected (and so unbiased in orientation) 3CRR radio sources are reported. The sample includes 21 quasars (=broad-line radio galaxies) and 17 narrow-line radio galaxies (NLRGs) with matched 178 MHz radio luminosity (log LR(5 GHz) ~ 44-45). The quasars have high radio core fraction, high X-ray luminosities (log LX ~ 45-46), and soft X-ray hardness ratios (HR ~ -0.5) indicating low obscuration. The NLRGs have lower core fraction, lower apparent X-ray luminosities (log LX ~43-45), and mostly hard X-ray hardness ratios (HR > 0) indicating obscuration (NH ~ 1022-1024 cm-2). These properties and the correlation between obscuration and radio core fraction are consistent with orientation-dependent obscuration as in unification models. About half the NLRGs have soft X-ray hardness ratios and/or a high [OIII] emission line to X-ray luminosity ratio suggesting obscuration by Compton thick (CT) material so that scattered nuclear or extended X-ray emission dominates (as in NGC 1068). The ratios of unobscured to Compton-thin (1022 cm-2 < NH(int) < 1.5 × 1024 cm-2) to CT (NH(int) > 1.5 × 1024 cm-2) is 2.5:1.4:1 in this high-luminosity, radio-selected sample. The obscured fraction is 0.5, higher than is typically reported for active galactic nuclei at comparable luminosities from multi-wavelength surveys (0.1-0.3). Assuming random nuclear orientation, the unobscured half-opening angle of the disk/wind/torus structure is ~60° and the obscuring material covers 30°, ~12° of which is CT. The multi-wavelength properties reveal that many NLRGs have intrinsic absorption 10-1000× higher than indicated by their X-ray hardness ratios, and their true LX values are ~10-100× larger than the hardness-ratio absorption corrections would indicate. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

136. CHANDRA X-RAY OBSERVATIONS OF THE REDSHIFT 1.53 RADIO-LOUD QUASAR 3C 270. 1.

Author

Wilkes, Belinda J., Lal, Dharam V., Worrall, D. M., Birkinshaw, Mark, Haas, Martin, Willner, S. P., Antonucci, Robert, Ashby, M. L. N., Avara, Mark, Barthel, Peter, Chini, Rolf, Fazio, G. G., Hardcastle, Martin, Lawrence, Charles, Leipski, Christian, Ogle, Patrick, and Schulz, Bernhard

Subjects
REDSHIFT, ASTROPHYSICS, METAPHYSICAL cosmology, QUASARS, ELECTRONS
Abstract

Chandra X-ray observations of the high redshift (ɀ = 1.532) radio-loud quasar 3C 270.1 in 2008 February show the nucleus to have a power-law spectrum, Γ = 1.66 ± 0.08, typical of a radio-loud quasar, and a marginally detected Fe Kα emission line. The data also reveal extended X-ray emission, about half of which is associated with the radio emission from this source. The southern emission is co-spatial with the radio lobe and peaks at the position of the double radio hot spot. Modeling this hot spot, including Spitzer upper limits, rules out synchrotron emission from a single power-law population of electrons, favoring inverse Compton emission with a field of ~ 11 nT, roughly a third of the equipartition value. The northern emission is concentrated close to the location of a 40° bend where the radio jet is presumed to encounter an external medium. It can be explained by inverse Compton emission involving cosmic microwave background photons with a field of ~3 nT, a factor of 7-10 below the equipartition value. The remaining, more diffuse X-ray emission is harder (HR = -0.09 ± 0.22). With only 22.8 ± 5.6 counts, the spectral form cannot be constrained. Assuming thermal emission with a temperature of 4 keV yields an estimate for the luminosity of 1.8x 1044 erg s-1, consistent with the luminosity-temperature relation of lower-redshift clusters. However, deeper Chandra X-ray observations are required to delineate the spatial distribution and better constrain the spectrum of the diffuse emission to verify that we have detected X-ray emission from a high-redshift cluster. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
View/download PDF

138. The Spitzer Survey of Stellar Structure in Galaxies ()

Author

Sheth, Kartik, Regan, Michael, Hinz, Joannah L., Gil, Armando, Paz, de, Menendez, Karin, Munoz, Carlos, Seibert, Mark, Kim, Taehyun, Laurikainen, Eija, Salo, Heikki, Gadotti, Dimitri A., Laine, Jarkko, Mizusawa, Trisha, Armus, Lee, Bosma, Albert, Buta, Ronald J., Capak, Peter, Jarrett, Thomas H., Elmegreen, Debra M., Elmegreen, Bruce G., Knapen, Johan H., Koda, Jin, Helou, George, Ho, Luis C., Madore, Barry F., Masters, Karen L., Mobasher, Bahram, Ogle, Patrick, Peng, Chien Y., Schinnerer, Eva, Surace, Jason A., Zaritsky, Dennis, Comeron, Sebastien, Swardt, Bonita de, Meidt, Sharon E., Kasliwal, Mansi, and Aravena, Manuel

Abstract

The Spitzer Survey of Stellar Structure in Galaxies () is an Exploration Science Legacy Program approved for the Spitzer post-cryogenic mission. It is a volume-, magnitude-, and size-limited (d < 40 Mpc, |b| > 30deg, mBcorr < 15.5, and D25 > 1') survey of 2331 galaxies using the Infrared Array Camera (IRAC) at 3.6 and 4.5 um. Each galaxy is observed for 240 s and mapped to [?]1.5 x D25. The final mosaicked images have a typical 1s rms noise level of 0.0072 and 0.0093 MJy sr-1 at 3.6 and 4.5 um, respectively. Our azimuthally averaged surface brightness profile typically traces isophotes at u3.6um(AB)(1s) [?] 27 mag arcsec-2, equivalent to a stellar mass surface density of [?]1 M[?]pc-2. thus provides an unprecedented data set for the study of the distribution of mass and stellar structures in the local universe. This large, unbiased, and extremely deep sample of all Hubble types from dwarfs to spirals to ellipticals will allow for detailed structural studies, not only as a function of stellar mass, but also as a function of the local environment. The data from this survey will serve as a vital testbed for cosmological simulations predicting the stellar mass properties of present-day galaxies. This article introduces the survey and describes the sample selection, the significance of the 3.6 and 4.5 um bands for this study, and the data collection and survey strategies. We describe the data analysis pipeline and present measurements for a first set of galaxies, observed in both the cryogenic and warm mission phases of Spitzer. For every galaxy we tabulate the galaxy diameter, position angle, axial ratio, inclination at u3.6um(AB) = 25.5, and 26.5 mag arcsec-2 (equivalent to [?]uB(AB) = 27.2 and 28.2 mag arcsec-2, respectively). These measurements will form the initial catalog of galaxy properties. We also measure the total magnitude and the azimuthally averaged radial profiles of ellipticity, position angle, surface brightness, and color. Finally, using the galaxy-fitting code GALFIT, we deconstruct each galaxy into its main constituent stellar components: the bulge/spheroid, disk, bar, and nuclear point source, where necessary. Together, these data products will provide a comprehensive and definitive catalog of stellar structures, mass, and properties of galaxies in the nearby universe and will enable a variety of scientific investigations, some of which are highlighted in this introductory survey paper.

Published
2010

139. The SpitzerSurvey of Stellar Structure in Galaxies ()

Author

Sheth, Kartik, Regan, Michael, Hinz, Joannah L., de Paz, Armando Gil, Menéndez-Delmestre, Karín, Muñoz-Mateos, Juan-Carlos, Seibert, Mark, Kim, Taehyun, Laurikainen, Eija, Salo, Heikki, Gadotti, Dimitri A., Laine, Jarkko, Mizusawa, Trisha, Armus, Lee, Athanassoula, E., Bosma, Albert, Buta, Ronald J., Capak, Peter, Jarrett, Thomas H., Elmegreen, Debra M., Elmegreen, Bruce G., Knapen, Johan H., Koda, Jin, Helou, George, Ho, Luis C., Madore, Barry F., Masters, Karen L., Mobasher, Bahram, Ogle, Patrick, Peng, Chien Y., Schinnerer, Eva, Surace, Jason A., Zaritsky, Dennis, Comerón, Sébastien, de Swardt, Bonita, Meidt, Sharon E., Kasliwal, Mansi, and Aravena, Manuel

Abstract

The SpitzerSurvey of Stellar Structure in Galaxies () is an Exploration Science Legacy Program approved for the Spitzerpost-cryogenic mission. It is a volume-, magnitude-, and size-limited (d< 40 Mpc, |b| > 30°, mBcorr< 15.5, and D25> 1') survey of 2331 galaxies using the Infrared Array Camera (IRAC) at 3.6 and 4.5 ?m. Each galaxy is observed for 240 s and mapped to ?1.5 × D25. The final mosaicked images have a typical 1? rms noise level of 0.0072 and 0.0093 MJy sr-1at 3.6 and 4.5 ?m, respectively. Our azimuthally averaged surface brightness profile typically traces isophotes at ?3.6?m(AB)(1?) ? 27 mag arcsec-2, equivalent to a stellar mass surface density of ?1 M?pc-2. thus provides an unprecedented data set for the study of the distribution of mass and stellar structures in the local universe. This large, unbiased, and extremely deep sample of all Hubble types from dwarfs to spirals to ellipticals will allow for detailed structural studies, not only as a function of stellar mass, but also as a function of the local environment. The data from this survey will serve as a vital testbed for cosmological simulations predicting the stellar mass properties of present-day galaxies. This article introduces the survey and describes the sample selection, the significance of the 3.6 and 4.5 ?m bands for this study, and the data collection and survey strategies. We describe the data analysis pipeline and present measurements for a first set of galaxies, observed in both the cryogenic and warm mission phases of Spitzer. For every galaxy we tabulate the galaxy diameter, position angle, axial ratio, inclination at ?3.6?m(AB) = 25.5, and 26.5 mag arcsec-2(equivalent to ??B(AB) = 27.2 and 28.2 mag arcsec-2, respectively). These measurements will form the initial catalog of galaxy properties. We also measure the total magnitude and the azimuthally averaged radial profiles of ellipticity, position angle, surface brightness, and color. Finally, using the galaxy-fitting code GALFIT, we deconstruct each galaxy into its main constituent stellar components: the bulge/spheroid, disk, bar, and nuclear point source, where necessary. Together, these data products will provide a comprehensive and definitive catalog of stellar structures, mass, and properties of galaxies in the nearby universe and will enable a variety of scientific investigations, some of which are highlighted in this introductory survey paper.

Published
2010
Full Text
View/download PDF

140. COSMIC EVOLUTION OF STAR FORMATION IN TYPE-1 QUASAR HOSTS SINCE z = 1

Author

Shi, Yong, Rieke, George H., Ogle, Patrick, Jiang, Linhua, and Diamond, Aleksandar M.

Abstract

We present Spitzer Infrared Spectrograph observations of a complete sample of 57 Sloan Digital Sky Survey type-1 quasars at z [?] 1. Aromatic features at 6.2 and/or 7.7 mm are detected in about half of the sample and show profiles similar to those seen in normal galaxies at both low and high redshift, indicating a star formation origin for the features. Based on the ratio of aromatic to star formation infrared (SFIR) luminosities for normal star-forming galaxies at z [?] 1, we have constructed the SFIR luminosity function (LF) of z [?] 1 quasars. As we found earlier for low-redshift Palomar-Green (PG) quasars, these z [?] 1 quasars show a flatter SFIR LF than do z [?] 1 field galaxies, implying the quasar host galaxy population has on average a higher star formation rate (SFR) than the field galaxies do. As measured from their SFIR LF, individual quasar hosts have on average LIRG-level SFRs, which mainly arise in the circumnuclear regions. By comparing with similar measurements of low-redshift PG quasars, we find that the comoving SFIR luminosity density in quasar hosts shows a much larger increase with redshift than that in field galaxies. The behavior is consistent with pure density evolution since the average SFR and the average SFR/BH accretion rate in quasar hosts show little evolution with redshift. For individual quasars, we have found a correlation between the aromatic-based SFR and the luminosity of the nuclear radiation, consistent with predictions of some theoretical models. We propose that type-1 quasars reside in a distinct galaxy population that shows elliptical morphology but that harbors a significant fraction of intermediate-age stars and is experiencing intense circumnuclear star formation.

Published
2009

141. Technological and Aesthetic Influences Upon the Development of Deep Focus Cinematography in the United States.

Author

Ogle, Patrick L.

Subjects
CINEMATOGRAPHY, SPECIAL effects (Motion pictures), MOTION pictures, ART & motion pictures, FILMMAKING, MOTION picture industry, PHOTOGRAPHIC film, AUDIOVISUAL materials, TIE-in novels
Abstract

The article discusses the range and weight of relative emphases in file scholarship. It is suggested that film is an art form and a medium of communications that developed from and continues to be dependent on a high level of technology. It is inferred that most critical and scholarly work on film seems almost consciously to stay away deliberately any concern for film technology and the relationship it bears to many aesthetics and historic trends in the cinema. Particular focus is given to the degree to which a style of film making can be dependent on both aesthetics and technology.

Published
1972
Full Text
View/download PDF

142. The Spitzer Survey of Stellar Structure in Galaxies (S4G)

Author

Sheth, Kartik, Armus, Lee, Athanassoula, Lia, Bosma, Albert, Buta, Ron, Capak, Peter, Elmegreen, Bruce, Elmegreen, Debra, Gaditto, Dimitri, Gil Paz, Armando, Helou, George, Hinz, Joannah, Ho, Luis, Jarrett, Tom, Knapen, Johan, Koda, Jin, Laurikainen, Eija, Madore, Barry, Masters, Karen, Menendez-Delmestre, Karin, Mobasher, Bahram, Munoz-Mateos, Juan Carlos, Ogle, Patrick, Peng, Chien, Michael Regan, Salo, Heikki, Schinnerer, Eva, Seibert, Mark, Surace, Jason, and Zaritsky, Dennis

143. JWST’s near infrared spectrograph status and first OTIS test results

Author

Lystrup, Makenzie, MacEwen, Howard A., Fazio, Giovanni G., Batalha, Natalie, Siegler, Nicholas, Tong, Edward C., Te Plate, Maurice, Birkmann, Stephan, Sirianni, Marco, Rawle, Timothy, Alves de Oliveira, Catarina, Böker, Torsten, Puga, Elena, Lützgendorf, Nora, Marston, Anthony, Rumler, Peter, Jensen, Peter, Giardino, Giovanna, Ferruit, Pierre, Ehrenwinkler, Ralf, Mosner, Peter, Karl, Hermann, Altenburg, Martin, Maschmann, Marc, Rapp, Robert, Smith, Corbett, Ogle, Patrick, Pena Guerrero, Maria, Proffitt, Charles, Wu, Rai, Kanarek, Graham, and Muzerolle, James

Published
2018
Full Text
View/download PDF

144. SUPPRESSION OF STAR FORMATION IN NGC 1266.

Author

Alatalo, Katherine, Lanz, Lauranne, Appleton, Philip N., Ogle, Patrick M., Bitsakis, Theodoros, Martín, Sergio, Lacy, Mark, Lonsdale, Carol J., Nyland, Kristina, Meier, David S., Cales, Sabrina L., Chang, Philip, Davis, Timothy A., and de Zeeuw, P. T.

Subjects
STELLAR evolution, GALAXIES, GALAXY formation, QUASARS, BLACK holes, INTERSTELLAR medium
Abstract

NGC 1266 is a nearby lenticular galaxy that harbors a massive outflow of molecular gas powered by the mechanical energy of an active galactic nucleus (AGN). It has been speculated that such outflows hinder star formation (SF) in their host galaxies, providing a form of feedback to the process of galaxy formation. Previous studies, however, indicated that only jets from extremely rare, high-power quasars or radio galaxies could impart significant feedback on their hosts. Here we present detailed observations of the gas and dust continuum of NGC 1266 at millimeter wavelengths. Our observations show that molecular gas is being driven out of the nuclear region at yr–1, of which the vast majority cannot escape the nucleus. Only 2 M☼ yr–1 is actually capable of escaping the galaxy. Most of the molecular gas that remains is very inefficient at forming stars. The far-infrared emission is dominated by an ultra-compact (≲ 50 pc) source that could either be powered by an AGN or by an ultra-compact starburst. The ratio of the SF surface density (ΣSFR) to the gas surface density () indicates that SF is suppressed by a factor of ≈50 compared to normal star-forming galaxies if all gas is forming stars, and ≈150 for the outskirt (98%) dense molecular gas if the central region is powered by an ultra-compact starburst. The AGN-driven bulk outflow could account for this extreme suppression by hindering the fragmentation and gravitational collapse necessary to form stars through a process of turbulent injection. This result suggests that even relatively common, low-power AGNs are able to alter the evolution of their host galaxies as their black holes grow onto the M-σ relation. [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
View/download PDF

145. First results from the JWST Early Release Science Program Q3D: Turbulent times in the life of a $z \sim 3$ extremely red quasar revealed by NIRSpec IFU

Author

Wylezalek, D, Vayner, A, Rupke, DSN, Zakamska, NL, Veilleux, S, Ishikawa, Y, Bertemes, C, Liu, W, Barrera-Ballesteros, JK, Chen, HW, Goulding, AD, Greene, JE, Hainline, KN, Hamann, F, Heckman, T, Johnson, SD, Lutz, D, Lützgendorf, N, Mainieri, V, Maiolino, R, Nesvadba, NPH, Ogle, P, Sturm, E, Wylezalek, D [0000-0003-2212-6045], Vayner, A [0000-0002-0710-3729], Rupke, DSN [0000-0002-1608-7564], Zakamska, NL [0000-0001-6100-6869], Veilleux, S [0000-0002-3158-6820], Ishikawa, Y [0000-0001-7572-5231], Bertemes, C [0000-0002-6948-1485], Liu, W [0000-0003-3762-7344], Barrera-Ballesteros, JK [0000-0003-2405-7258], Chen, HW [0000-0001-8813-4182], Goulding, AD [0000-0003-4700-663X], Greene, JE [0000-0002-5612-3427], Hainline, KN [0000-0003-4565-8239], Heckman, T [0000-0001-6670-6370], Johnson, SD [0000-0001-9487-8583], Lutz, D [0000-0003-0291-9582], Lützgendorf, N [0000-0002-4034-0080], Mainieri, V [0000-0002-1047-9583], Maiolino, R [0000-0002-4985-3819], Nesvadba, NPH [0000-0001-5783-6544], Ogle, P [0000-0002-3471-981X], Sturm, E [0000-0002-0018-3666], Apollo - University of Cambridge Repository, Wylezalek, Dominika [0000-0003-2212-6045], Vayner, Andrey [0000-0002-0710-3729], Rupke, David SN [0000-0002-1608-7564], Zakamska, Nadia L [0000-0001-6100-6869], Veilleux, Sylvain [0000-0002-3158-6820], Ishikawa, Yuzo [0000-0001-7572-5231], Bertemes, Caroline [0000-0002-6948-1485], Liu, Weizhe [0000-0003-3762-7344], Barrera-Ballesteros, Jorge K [0000-0003-2405-7258], Chen, Hsiao-Wen [0000-0001-8813-4182], Goulding, Andy D [0000-0003-4700-663X], Greene, Jenny E [0000-0002-5612-3427], Hainline, Kevin N [0000-0003-4565-8239], Heckman, Timothy [0000-0001-6670-6370], Johnson, Sean D [0000-0001-9487-8583], Lutz, Dieter [0000-0003-0291-9582], Lützgendorf, Nora [0000-0002-4034-0080], Mainieri, Vincenzo [0000-0002-1047-9583], Maiolino, Roberto [0000-0002-4985-3819], Nesvadba, Nicole PH [0000-0001-5783-6544], Ogle, Patrick [0000-0002-3471-981X], and Sturm, Eckhard [0000-0002-0018-3666]

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), 5101 Astronomical Sciences, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astronomy and Astrophysics, 51 Physical Sciences, Galaxies and Cosmology, Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Extremely red quasars, with bolometric luminosities exceeding $10^{47}$ erg s$^{-1}$, are a fascinating high-redshift population that is absent in the local universe. They are the best candidates for supermassive black holes accreting at rates at or above the Eddington limit, and they are associated with the most rapid and powerful outflows of ionized gas known to date. They are also hosted by massive galaxies. Here we present the first integral field unit (IFU) observations of a high-redshift quasar obtained by the Near Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST), which targeted SDSSJ165202.64+172852.3, an extremely red quasar at $z=2.94$. JWST observations reveal extended ionized gas - as traced by [OIII]$\lambda$5007\AA - in the host galaxy of the quasar, its outflow, and the circumgalactic medium. The complex morphology and kinematics imply that the quasar resides in a very dense environment with several interacting companion galaxies within projected distances of 10-15 kpc. The high density of the environment and the large velocities of the companion galaxies suggest that this system may represent the core of a forming cluster of galaxies. The system is a good candidate for a merger of two or more dark matter halos, each with a mass of a few $10^{13}$ M$_\odot$ and traces potentially one of the densest knots at $z\sim3$., Comment: ApJL in press, 11 pages, please also see associated ESA / STScI press release from Oct 20th 2022

Published
2022
Full Text
View/download PDF

147. Cubos espectrales de Spitzer y el hidrógeno molecular en AGNs: El caso de M58

Author

López, Iván Ezequiel, Reynaldi, María Victoria, and Ogle, Patrick

Subjects
Ciencias Astronómicas, Telescopios, Galaxia, Hidrógeno
Abstract

En esta Tesis desarrollamos una herramienta que permite el ajuste de diversos modelos físicos de emisión y es aplicable a cubos espectrales del instrumento IRS del Telescopio Espacial Spitzer. Para aumentar la velocidad del ajuste, utilizamos procesamiento en paralelo. Con esta herramienta, ajustamos los cubos espectrales IR de la galaxia M58. Nuestros resultados muestran evidencia de emisión extendida de Hidrógeno molecular en la galaxia M58, la cual podría ser excitada por un mecanismo de choque en la región de escala de kilopársecs de la galaxia, probablemente debido a la interacción entre el radio-jet y el medio interestelar. Además, detectamos que en la región de gas chocado el cociente PAH7.7/PAH11.3 toma valores bajos, los cuales podrían ser explicados por baja formación estelar o destrucción de las partículas de polvo., In this Thesis we have developed a spectral fitting tool that allows modeling of physical emission processes. It is currently used for spectral cubes of the IRS instrument onboard the Spitzer Space Telescope. Parallel processing was used in order to maximize the fitting speed (i.e. minimize CPU-time). This tool was tested with the IR spectral cubes of M58. Our results show evidence of extended molecular hydrogen emission surrouding the nuclear region of M58 up to distances of 1 kpc. H2 emission is likely excited by shocks triggered by the interaction between the radio jet and the interstellar medium. The regions of shocked gas are also characterized by low PAH ratio PAH7.7/PAH11.3), which might be accounting for low-rate star formation or destruction of dust grains., Facultad de Ciencias Astronómicas y Geofísicas

Published
2020

148. THE NUCLEAR SPECTROSCOPIC TELESCOPE ARRAY (NuSTAR) HIGH-ENERGY X-RAY MISSION

Author

Fiona A. Harrison, William W. Craig, Finn E. Christensen, Charles J. Hailey, William W. Zhang, Steven E. Boggs, Daniel Stern, W. Rick Cook, Karl Forster, Paolo Giommi, Brian W. Grefenstette, Yunjin Kim, Takao Kitaguchi, Jason E. Koglin, Kristin K. Madsen, Peter H. Mao, Hiromasa Miyasaka, Kaya Mori, Matteo Perri, Michael J. Pivovaroff, Simonetta Puccetti, Vikram R. Rana, Niels J. Westergaard, Jason Willis, Andreas Zoglauer, Hongjun An, Matteo Bachetti, Nicolas M. Barrière, Eric C. Bellm, Varun Bhalerao, Nicolai F. Brejnholt, Felix Fuerst, Carl C. Liebe, Craig B. Markwardt, Melania Nynka, Julia K. Vogel, Dominic J. Walton, Daniel R. Wik, David M. Alexander, Lynn R. Cominsky, Ann E. Hornschemeier, Allan Hornstrup, Victoria M. Kaspi, Greg M. Madejski, Giorgio Matt, Silvano Molendi, David M. Smith, John A. Tomsick, Marco Ajello, David R. Ballantyne, Mislav Baloković, Didier Barret, Franz E. Bauer, Roger D. Blandford, W. Niel Brandt, Laura W. Brenneman, James Chiang, Deepto Chakrabarty, Jerome Chenevez, Andrea Comastri, Francois Dufour, Martin Elvis, Andrew C. Fabian, Duncan Farrah, Chris L. Fryer, Eric V. Gotthelf, Jonathan E. Grindlay, David J. Helfand, Roman Krivonos, David L. Meier, Jon M. Miller, Lorenzo Natalucci, Patrick Ogle, Eran O. Ofek, Andrew Ptak, Stephen P. Reynolds, Jane R. Rigby, Gianpiero Tagliaferri, Stephen E. Thorsett, Ezequiel Treister, C. Megan Urry, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Chakrabarty, Deepto, Harrison Fiona, A., Craig William, W., Christensen Finn, E., Hailey Charles, J., Zhang William, W., Boggs Steven, E., Stern, Daniel, Cook W., Rick, Forster, Karl, Giommi, Paolo, Grefenstette Brian, W., Kim, Yunjin, Kitaguchi, Takao, Koglin Jason, E., Madsen Kristin, K., Mao Peter, H., Miyasaka, Hiromasa, Mori, Kaya, Perri, Matteo, Pivovaroff Michael, J., Puccetti, Simonetta, Rana Vikram, R., Westergaard Niels, J., Willis, Jason, Zoglauer, Andrea, An, Hongjun, Bachetti, Matteo, Barriere Nicolas, M., Bellm Eric, C., Bhalerao, Varun, Brejnholt Nicolai, F., Fuerst, Felix, Liebe Carl, C., Markwardt Craig, B., Nynka, Melania, Vogel Julia, K., Walton Dominic, J., Wik Daniel, R., Alexander David, M., Cominsky Lynn, R., Hornschemeier Ann, E., Hornstrup, Allan, Kaspi Victoria, M., Madejski Greg, M., Matt, Giorgio, Molendi, Silvano, Smith David, M., Tomsick John, A., Ajello, Marco, Ballantyne David, R., Balokovic, Mislav, Barret, Didier, Bauer Franz, E., Blandford Roger, D., Brandt W., Niel, Brenneman Laura, W., Chiang, Jame, Chenevez, Jerome, Comastri, Andrea, Dufour, Francoi, Elvis, Martin, Fabian Andrew, C., Farrah, Duncan, Fryer Chris, L., Gotthelf Eric, V., Grindlay Jonathan, E., Helfand David, J., Krivonos, Roman, Meier David, L., Miller Jon, M., Natalucci, Lorenzo, Ogle, Patrick, Ofek Eran, O., Ptak, Andrew, Reynolds Stephen, P., Rigby Jane, R., Tagliaferri, Gianpiero, Thorsett Stephen, E., Treister, Ezequiel, and Urry C., Megan

Subjects
media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Collimated light, law.invention, Telescope, X-rays, Primary (astronomy), Observatory, law, Spectral resolution, Astrophysics::Galaxy Astrophysics, media_common, Physics, Spacecraft, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Space vehicles, Space and Planetary Science, Sky, Astrophysics::Earth and Planetary Astrophysics, Orbit (control theory), business, Instruments
Abstract

The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 2012 June 13, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3 to 79 keV, extending the sensitivity of focusing far beyond the ~10 keV high-energy cutoff achieved by all previous X-ray satellites. The inherently low background associated with concentrating the X-ray light enables NuSTAR to probe the hard X-ray sky with a more than 100-fold improvement in sensitivity over the collimated or coded mask instruments that have operated in this bandpass. Using its unprecedented combination of sensitivity and spatial and spectral resolution, NuSTAR will pursue five primary scientific objectives: (1) probe obscured active galactic nucleus (AGN) activity out to the peak epoch of galaxy assembly in the universe (at z[< over ~]2) by surveying selected regions of the sky; (2) study the population of hard X-ray-emitting compact objects in the Galaxy by mapping the central regions of the Milky Way; (3) study the non-thermal radiation in young supernova remnants, both the hard X-ray continuum and the emission from the radioactive element [superscript 44]Ti; (4) observe blazars contemporaneously with ground-based radio, optical, and TeV telescopes, as well as with Fermi and Swift, to constrain the structure of AGN jets; and (5) observe line and continuum emission from core-collapse supernovae in the Local Group, and from nearby Type Ia events, to constrain explosion models. During its baseline two-year mission, NuSTAR will also undertake a broad program of targeted observations. The observatory consists of two co-aligned grazing-incidence X-ray telescopes pointed at celestial targets by a three-axis stabilized spacecraft. Deployed into a 600 km, near-circular, 6° inclination orbit, the observatory has now completed commissioning, and is performing consistent with pre-launch expectations. NuSTAR is now executing its primary science mission, and with an expected orbit lifetime of 10 yr, we anticipate proposing a guest investigator program, to begin in late 2014., United States. National Aeronautics and Space Administration (Contract NNG08FD06C)

Published
2013

149. CORRESPONDENCE.

Author

Green, Seth, Glenn-Anderson, James B., Gagne, Nicole V., Wissot, Lauren, Lovitt, Chip, Ogle, Patrick, Cantrall, Jesse, Witt, Dan, and Stauth, Cameron

Subjects
*LETTERS to the editor, *POPULAR music, 2001-2010
Abstract

Several letters to the editor are presented in response to articles in previous issues including a cover story on Jay-Z and the articles "The Artful Dodger" and "My Favorite Nut Job."

Published
2007

Catalog

Books, media, physical & digital resources
See catalog results