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Browsing MIT Open Access Articles by Title

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  • Mori, Kaya; Gotthelf, Eric V.; Zhang, Shuo; An, Hongjun; Baganoff, Frederick K.; Barriere, Nicolas M.; Beloborodov, Andrei M.; Boggs, Steven E.; Christensen, Finn E.; Craig, William W.; Dufour, Francois; Grefenstette, Brian W.; Hailey, Charles J.; Harrison, Fiona A.; Hong, Jaesub; Kaspi, Victoria; Kennea, Jamie A.; Madsen, Kristin K.; Markwardt, Craig B.; Nynka, Melania; Stern, Daniel; Tomsick, John A.; Zhang, William W. (IOP Publishing, 2013-05)
    We report the discovery of 3.76 s pulsations from a new burst source near Sgr A* observed by the NuSTAR observatory. The strong signal from SGR J1745–29 presents a complex pulse profile modulated with pulsed fraction 27% ...
  • Pottschmidt, Katja; Kennea, Jamie A.; Bachetti, Matteo; Bellm, Eric C.; Boggs, Steven E.; Chakrabarty, Deepto; Christensen, Finn E.; Craig, William W.; Hailey, Charles J.; Harrison, Fiona A.; Stern, Daniel; Tomsick, John A.; Walton, Dominic J.; Zhang, William; Furst, Felix; Wilms, Jorn (IOP Publishing, 2014-03)
    We present a spectral analysis of three simultaneous Nuclear Spectroscopy Telescope Array and Swift/XRT observations of the transient Be-neutron star binary KS 1947+300 taken during its outburst in 2013/2014. These broadband ...
  • Krivonos, Roman A.; Tsygankov, Sergey S.; Lutovinov, Alexander A.; Tomsick, John A.; Chakrabarty, Deepto; Bachetti, Matteo; Boggs, Steven E.; Chernyakova, Masha; Christensen, Finn E.; Craig, William W.; Fürst, Felix; Hailey, Charles J.; Harrison, Fiona A.; Lansbury, George B.; Rahoui, Farid; Stern, Daniel; Zhang, William W. (IOP Publishing, 2015-08)
    We present spectral and timing analyses of Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the accreting X-ray pulsar 2RXP J130159.6–635806. The source was serendipitously observed during a campaign focused ...
  • Baganoff, Frederick K. (IOP Publishing, 2015-11)
    We present the first sub-arcminute images of the Galactic Center above 10 keV, obtained with NuSTAR. NuSTAR resolves the hard X-ray source IGR J17456–2901 into non-thermal X-ray filaments, molecular clouds, point sources, ...
  • Hong, JaeSub; Mori, Kaya; Hailey, Charles J.; Nynka, Melania; Zhang, Shuo; Gotthelf, Eric; Fornasini, Francesca M.; Krivonos, Roman; Bauer, Franz; Perez, Kerstin; Tomsick, John A.; Bodaghee, Arash; Chiu, Jeng-Lun; Clavel, Maica; Stern, Daniel; Grindlay, Jonathan E.; Alexander, David M.; Aramaki, Tsuguo; Barret, Didier; Barriere, Nicolas; Boggs, Steven E.; Canipe, Alicia M.; Christensen, Finn E.; Craig, William W.; Desai, Meera A.; Forster, Karl; Giommi, Paolo; Grefenstette, Brian W.; Harrison, Fiona A.; Hong, Dooran; Hornstrup, Allan; Kitaguchi, Takao; Koglin, Jason E.; Madsen, Kristen K.; Mao, Peter H.; Miyasaka, Hiromasa; Perri, Matteo; Pivovaroff, Michael J.; Puccetti, Simonetta; Rana, Vikram; Westergaard, Niels J.; Zhang, William W.; Zoglauer, Andreas; Baganoff, Frederick K (IOP Publishing, 2016-07)
    We present the first survey results of hard X-ray point sources in the Galactic Center (GC) region by NuSTAR. We have discovered 70 hard (3–79 keV) X-ray point sources in a 0.6 deg² region around Sgr A* with a total exposure ...
  • Krivonos, Roman A.; Tomsick, John A.; Bachetti, Matteo; Boggs, Steven E.; Chakrabarty, Deepto; Christensen, Finn E.; Craig, William W.; Hailey, Charles J.; Harrison, Fiona A.; Hong, Jaesub; Mori, Kaya; Stern, Daniel; Zhang, William W.; Barriere, Nicolas M. (IOP Publishing, 2015-01)
    We report on two NuSTAR observations of GRS 1741.9-2853, a faint neutron star (NS) low-mass X-ray binary burster located 10' away from the Galactic center. NuSTAR detected the source serendipitously as it was emerging from ...
  • Degenaar, N.; Miller, J. M.; Harrison, F. A.; Kara, E.; Fabian, A. C.; Chakrabarty, Deepto (Oxford University Press, 2015-05)
    Studying the reflection of X-rays off the inner edge of the accretion disc in a neutron star low-mass X-ray binary allows us to investigate the accretion geometry and to constrain the radius of the neutron star. We report ...
  • Chakrabarty, Deepto (IOP Publishing, 2014-07)
    We report NuSTAR observations of the millisecond pulsar-low-mass X-ray binary (LMXB) transition system PSR J1023+0038 from 2013 June and October, before and after the formation of an accretion disk around the neutron star. ...
  • Tomsick, John A.; Bellm, Eric; Fuerst, Felix; Harrison, Fiona; Miyasaka, Hiromasa; Tendulkar, Shriharsh; Bhalerao, Varun; King, Ashley; Natalucci, Lorenzo; Stern, Daniel; Chakrabarty, Deepto; Miller, Jon M (2014-09)
    As of 2014 August, the Nuclear Spectroscopic Telescope Array (NuSTAR) had observed ~30 X-ray binaries either as part of the planned program, as targets of opportunity, or for instrument calibration. The main science goals ...
  • Koss, Michael J.; Baloković, Mislav; Stern, Daniel; Lamperti, Isabella; Assef, Roberto; Bauer, Franz; Ballantyne, David; Boggs, Steven E.; Craig, William W.; Farrah, Duncan; Fürst, Felix; Gandhi, Poshak; Gehrels, Neil; Hailey, Charles J.; Harrison, Fiona A.; Markwardt, Craig; Masini, Alberto; Ricci, Claudio; Treister, Ezequiel; Walton, Dominic J.; Zhang, William W.; Glidden, Ana (2016-06)
  • Chakrabarty, Deepto; NuSTAR Team (WILEY-VCH Verlag GmbH & Co., 2014-03)
    The Nuclear Spectroscopic Telescope Array (NuSTAR) is the first focusing hard X-ray mission in orbit and operates in the 3–79 keV range. NuSTAR's sensitivity is roughly two orders of magnitude better than previous missions ...
  • Miller, J. M.; Parker, M. L.; Fuerst, F.; Bachetti, Matteo; Harrison, Fiona A.; Barret, Didier; Boggs, Steven E.; Christensen, Finn E.; Craig, William W.; Fabian, Andrew C.; Grefenstette, Brian W.; Hailey, Charles J.; King, A. L.; Stern, D. K.; Tomsick, J. A.; Walton, D. J.; Zhang, W. W.; Chakrabarty, Deepto (IOP Publishing, 2013-09)
    We report on the results of spectral fits made to a NuSTAR observation of the black hole GRS 1915+105 in a "plateau" state. This state is of special interest because it is similar to the "low/hard" state seen in other black ...
  • Nynka, Melania; Hailey, Charles J.; Reynolds, Stephen P.; An, Hongjun; Baganoff, Frederick K.; Boggs, Steven E.; Christensen, Finn E.; Craig, William W.; Gotthelf, Eric V.; Grefenstette, Brian W.; Harrison, Fiona A.; Krivonos, Roman A.; Madsen, Kristin K.; Mori, Kaya; Perez, Kerstin; Stern, Daniel; Wik, Daniel R.; Zhang, William W.; Zoglauer, Andreas (IOP Publishing, 2014-07)
    We present NuSTAR high-energy X-ray observations of the pulsar wind nebula (PWN)/supernova remnant G21.5–0.9. We detect integrated emission from the nebula up to ~40 keV, and resolve individual spatial features over a broad ...
  • Wurtman, Richard Jay (MDPI AG, 2014-04)
    Brain neurons form synapses throughout the life span. This process is initiated by neuronal depolarization, however the numbers of synapses thus formed depend on brain levels of three key nutrients—uridine, the omega-3 ...
  • Weidberg, Hilla; Moretto, Fabien; Spedale, Gianpiero; Amon, Angelika B.; van Werven, Folkert J. (Public Library of Science, 2016-06)
    Cell fate choices are tightly controlled by the interplay between intrinsic and extrinsic signals, and gene regulatory networks. In Saccharomyces cerevisiae, the decision to enter into gametogenesis or sporulation is ...
  • Kearns, Patrick J.; Angell, John H.; Deegan, Linda A.; Stanley, Rachel H. R.; Bowen, Jennifer L.; Howard, Evan Michael (Springer Nature, 2016-09)
    Microorganisms control key biogeochemical pathways, thus changes in microbial diversity, community structure and activity can affect ecosystem response to environmental drivers. Understanding factors that control the ...
  • Chantranupong, Lynne; Wolfson, Rachel Laura; Sabatini, David (Elsevier, 2015-03)
    For organisms to coordinate their growth and development with nutrient availability they must be able to sense nutrient levels in their environment. Here, we review select nutrient sensing mechanisms in a few diverse ...
  • Efeyan, Alejo; Comb, William C.; Sabatini, David M. (Nature Publishing Group, 2015-01)
    The ability to sense and respond to fluctuations in environmental nutrient levels is a requisite for life. Nutrient scarcity is a selective pressure that has shaped the evolution of most cellular processes. Different ...
  • Silberman, Rebecca Estelle; Gordon, D.; Ingram, K. K. (Springer International Publishing, 2016-03)
    In eusocial species, including ants and honeybees, sterile or non-reproductive workers can specialize in task-specific behaviors, such as brood care and foraging for food. The mechanisms underlying task-specific behaviors ...
  • Efeyan, Alejo; Sabatini, David M.; Sabatini, David M. (Portland Press, 2013-08)
    Growth factors and nutrients regulate the mTORC1 [mammalian (or mechanistic) target of rapamycin complex 1] by different mechanisms. The players that link growth factors and mTORC1 activation have been known for several ...
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