Institution
Goddard Space Flight Center
Facility•Greenbelt, Maryland, United States•
About: Goddard Space Flight Center is a facility organization based out in Greenbelt, Maryland, United States. It is known for research contribution in the topics: Galaxy & Solar wind. The organization has 19058 authors who have published 63344 publications receiving 2786037 citations. The organization is also known as: GSFC & Space Flight Center.
Topics: Galaxy, Solar wind, Magnetosphere, Stars, Population
Papers published on a yearly basis
Papers
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TL;DR: In this article, a statistical model, including terms for seasonal variation, linear trend, quasi-biennial oscillation, solar cycle and second-order autoregressive noise has been fit to the TOMS time series of total ozone data.
Abstract: The Total Ozone Mapping Spectrometer (TOMS) on the Nimbus 7 satellite has been measuring the total column amount of ozone over the globe for more than 11 years. Recent improvements in the data analysis have led to a technique for determining and removing drift in the calibration such that the data at the end of the record are precise to + or - 1.3 percent (2-sigma) relative to the data at the beginning of the record. A statistical model, including terms for seasonal variation, linear trend, quasi-biennial oscillation, solar cycle and second-order autoregressive noise has been fit to the TOMS time series of total ozone data. The linear trend obtained when this statistical model is fit to the TOMS data averaged between 65 N and 65 S latitudes is -0.26 + or - 0.14 percent/year or -3 percent over the 11.6 year time period from November 1978 to May 1990. The trend is near zero (0.0002 + or - 0.2 percent/year) at the equator and increases toward both poles.
527 citations
Los Alamos National Laboratory1, Goddard Space Flight Center2, Marshall Space Flight Center3, Ben-Gurion University of the Negev4, University of Amsterdam5, Universities Space Research Association6, Stanford University7, Institute for Advanced Study8, Pennsylvania State University9, National Research Council10, Harvard University11, University of Maryland, College Park12, Saitama University13
TL;DR: In this article, the authors reported that SGR1806-20, a soft γ-ray repeater in Sagittarius, released a giant flare that has been called the brightest explosion ever recorded.
Abstract: On 27 December last year, SGR1806–20, a soft γ-ray repeater in Sagittarius, released a giant flare that has been called the brightest explosion ever recorded. SGRs are X-ray stars that sporadically emit low-energy γ-ray bursts. They are thought to be magnetars: neutron stars with observable emissions powered by magnetic dissipation. Five papers in this issue report initial and follow-up observations of this event. The data are remarkable: for instance in a fifth of a second, the flare released as much energy as the Sun radiates in a quarter of a million years. Such power can be explained by catastrophic global crust failure and magnetic reconnection on a magnetar. Releasing a hundred times the energy of the only two previous SGR giant flares, this may have been a once-in-a-lifetime event for astronomers, and for the star itself. Two classes of rotating neutron stars—soft γ-ray repeaters (SGRs) and anomalous X-ray pulsars—are magnetars1, whose X-ray emission is powered by a very strong magnetic field (B ≈ 1015 G). SGRs occasionally become ‘active’, producing many short X-ray bursts. Extremely rarely, an SGR emits a giant flare with a total energy about a thousand times higher than in a typical burst2,3,4. Here we report that SGR 1806–20 emitted a giant flare on 27 December 2004. The total (isotropic) flare energy is 2 × 1046 erg, which is about a hundred times higher than the other two previously observed giant flares. The energy release probably occurred during a catastrophic reconfiguration of the neutron star's magnetic field. If the event had occurred at a larger distance, but within 40 megaparsecs, it would have resembled a short, hard γ-ray burst, suggesting that flares from extragalactic SGRs may form a subclass of such bursts.
526 citations
Goddard Space Flight Center1, Marshall Space Flight Center2, Colorado State University3, University of Maryland, College Park4, NASA Headquarters5, National Institute of Information and Communications Technology6, National Oceanic and Atmospheric Administration7, Japan Aerospace Exploration Agency8, University of Maryland, Baltimore County9, University of Tokyo10, Texas A&M University11
TL;DR: The GPM mission collects essential rain and snow data for scientific studies and societal benefit and aims to provide real-time information about rainfall and snowfall to improve understanding of climate change.
Abstract: The GPM mission collects essential rain and snow data for scientific studies and societal benefit.
525 citations
TL;DR: In this article, the authors performed a global-scale analysis of the impact of water withdrawals on water storage variations, using the global water resources and use model WaterGAP, and concluded that water withdrawals at the scale of the whole Mississippi basin cannot be monitored by GRACE.
524 citations
Pennsylvania State University1, Special Astrophysical Observatory2, University of Hertfordshire3, Purple Mountain Observatory4, Brera Astronomical Observatory5, University College London6, Liverpool John Moores University7, Goddard Space Flight Center8, University of Leicester9, University of Warsaw10, University of Nevada, Las Vegas11, Universities Space Research Association12, University of Milan13, University of Amsterdam14, Marshall Space Flight Center15, Hebrew University of Jerusalem16, University of Bologna17, Spanish National Research Council18, European Southern Observatory19, Space Telescope Science Institute20, Leiden University21, ASTRON22, Swinburne University of Technology23, University of Ljubljana24, Warsaw University of Technology25, INAF26, University of Warwick27, Aryabhatta Research Institute of Observational Sciences28, Joint Institute for VLBI in Europe29, University of California, Santa Cruz30, University of Perugia31
TL;DR: Observations of the extraordinarily bright prompt optical and γ-ray emission of GRB 080319B that provide diagnostics within seconds of its formation, followed by broadband observations of the afterglow decay that continued for weeks.
Abstract: Long-duration gamma-ray bursts (GRBs) release copious amounts of energy across the entire electromagnetic spectrum, and so provide a window into the process of black hole formation from the collapse of massive stars Previous early optical observations of even the most exceptional GRBs (990123 and 030329) lacked both the temporal resolution to probe the optical flash in detail and the accuracy needed to trace the transition from the prompt emission within the outflow to external shocks caused by interaction with the progenitor environment Here we report observations of the extraordinarily bright prompt optical and gamma-ray emission of GRB 080319B that provide diagnostics within seconds of its formation, followed by broadband observations of the afterglow decay that continued for weeks We show that the prompt emission stems from a single physical region, implying an extremely relativistic outflow that propagates within the narrow inner core of a two-component jet
524 citations
Authors
Showing all 19247 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Anton M. Koekemoer | 168 | 1127 | 106796 |
| Alexander S. Szalay | 166 | 936 | 145745 |
| David W. Johnson | 160 | 2714 | 140778 |
| Donald G. York | 160 | 681 | 156579 |
| Takeo Kanade | 147 | 799 | 103237 |
| Gillian R. Knapp | 145 | 460 | 121477 |
| Olaf Reimer | 144 | 716 | 74359 |
| R. A. Sunyaev | 141 | 848 | 107966 |
| Christopher T. Russell | 137 | 2378 | 97268 |
| Hui Li | 135 | 2982 | 105903 |
| Neil Gehrels | 134 | 727 | 80804 |
| Christopher B. Field | 133 | 408 | 88930 |
| Igor V. Moskalenko | 132 | 542 | 58182 |
| William T. Reach | 131 | 535 | 90496 |
| Adam Burrows | 130 | 623 | 55483 |