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Browsing MIT Open Access Articles by Title

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  • Helder, E. A.; Broos, P. S.; Dewey, Dan; Dwek, E.; McCray, Richard; Park, S.; Racusin, J. L.; Zhekov, S. A.; Burrows, David N. (Institute of Physics/American Astronomical Society, 2013-02)
    We report on the present stage of SN 1987A as observed by the Chandra X-Ray Observatory. We reanalyze published Chandra observations and add three more epochs of Chandra data to get a consistent picture of the evolution ...
  • Davis, John E.; Houck, John C.; Nowak, Michael A. (IOP Publishing, 2010-07)
    The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to ...
  • Kallman, T. R.; Schulz, Norbert S.; Nowak, Michael A.; Torrejon, J. M. (IOP Publishing, 2010-05)
    Fe K line fluorescence is commonly observed in the X-ray spectra of many X-ray binaries (XRBs) and represents a fundamental tool to investigate the material surrounding the X-ray source. In this paper, we present a ...
  • Nichols, Joy S.; Henden, Arne A.; Huenemoerder, David P.; Lauer, Jennifer L.; Martin, Eric; Morgan, Douglas L.; Sundheim, Beth A. (IOP Publishing, 2010-06)
    Variable stars have been identified among the optical-wavelength light curves of guide stars used for pointing control of the Chandra X-ray Observatory. We present a catalog of these variable stars along with their light ...
  • Castro, Daniel; Lopez, Laura A.; Slane, Patrick O.; Yamaguchi, Hiroya; Ramirez-Ruiz, Enrico; Figueroa-Feliciano, Enectali (Institute of Physics Publishing, 2013-12)
    The shocks of supernova remnants are believed to accelerate particles to cosmic ray (CR) energies. The amplification of the magnetic field due to CRs propagating in the shock region is expected to have an impact on both ...
  • Humphrey, Philip J.; Buote, David A.; Canizares, Claude R. (IOP Publishing, 2004)
    Using a new Chandra ACIS-S3 observation of the normal, isolated, moderate-L[subscript X] lenticular galaxy NGC 1332, we resolve the emission into ~75 point sources and a significant diffuse component. We present a detailed ...
  • Chakrabarty, Deepto; Jonker, P. G.; Torres, Manuel A. P.; Steeghs, Danny (Oxford University Press, 2012-12)
    We report on Chandra X-ray and Gemini-North near-infrared K-band observations of the eclipsing accretion-powered millisecond X-ray pulsar SWIFT J1749.4−2807 in quiescence. Using the Chandra observation we derive a source ...
  • Jeltema, Tesla E.; Canizares, Claude R.; Bautz, Mark W.; Malm, Michael R.; Donahue, Megan; Garmire, Gordon P. (IOP Publishing, 2001-11)
    We observed MS 1054-0321, the highest redshift cluster of galaxies in the Einstein Medium Sensitivity Survey (EMSS), with the Chandra ACIS-S detector. We find the X-ray temperature of the cluster to be 10.4 [+1.7 over -1.5] ...
  • Hanke, Manfred; Wilms, Jörn; Nowak, Michael A.; Pottschmidt, Katja; Schulz, Norbert S.; Lee, Julia C. (IOP Publishing, 2008-12)
    We present analyses of a 50 ks observation of the supergiant X-ray binary system Cygnus X-1 (Cyg X-1)/HDE226868 taken with the Chandra High Energy Transmission Grating Spectrometer (HETGS). Cyg X-1 was in its spectrally ...
  • Barbosa, Alexandra; Maethger, Lydia M.; Akkaynak Yellin, Derya; Siemann, Liese A. (Royal Society, 2017-02)
    Flounder change colour and pattern for camouflage. We used a spectrometer to measure reflectance spectra and a digital camera to capture body patterns of two flounder species camouflaged on four natural backgrounds of ...
  • Piles, Maria; Camps, Adriano; Entekhabi, Dara (Institute of Electrical and Electronics Engineers, 2009-11)
    A change detection algorithm has been developed in order to obtain high-resolution soil moisture estimates from future Soil Moisture Active and Passive (SMAP) L-band radar and radiometer observations. The approach combines ...
  • Oloritun, Rahman O.; Ouarda, Taha B. M. J.; Moturu, Sai T.; Madan, Anmol; Khayal, Inas; Pentland, Alex Paul (Public Library of Science, 2013-11)
    Research has mostly focused on obesity and not on processes of BMI change more generally, although these may be key factors that lead to obesity. Studies have suggested that obesity is affected by social ties. However these ...
  • Cackett, E. M.; Brown, E. F.; Cumming, A.; Degenaar, N.; Fridriksson, Joel K.; Miller, J. M.; Wijnands, R.; Homan, Jeroen (IOP Publishing, 2013-08)
    The quasi-persistent neutron star low-mass X-ray binary MXB 1659–29 went into quiescence in 2001, and we have followed its quiescent X-ray evolution since. Observations over the first 4 yr showed a rapid drop in flux and ...
  • Guevara, Cristian Angelo; Ben-Akiva, Moshe E. (Institute for Operations Research and the Management Sciences (INFORMS), 2012-08)
    Endogeneity is a model misspecification that precludes the consistent estimation of the model parameters. The control-function method is the most suitable tool to address endogeneity for several discrete choice models that ...
  • Meerson, Ari; Cacheaux, Luisa; Goosens, Ki Ann; Sapolsky, Robert M.; Soreq, Hermona; Kaufer, Daniela (Springer-Verlag, 2009-08)
    Mental stress modifies both cholinergic neurotransmission and alternative splicing in the brain, via incompletely understood mechanisms. Here, we report that stress changes brain microRNA (miR) expression and that some of ...
  • Goranov, Alexi I.; Gulati, Amneet; Dephoure, Noah; Takahara, Terunao; Maeda, Tatsuya; Gygi, Steven P.; Manalis, Scott R.; Amon, Angelika B. (Elsevier, 2013-06)
    Background: Growth rate is determined not only by extracellular cues such as nutrient availability but also by intracellular processes. Changes in cell morphology in budding yeast, mediated by polarization of the actin ...
  • Ahn, Benjamin; Saulnier, Christopher Robert; Bagiati, Aikaterini; Brisson II, John G (2015-07)
    In the summer of 2014, 30 students from the Singapore University of Technology and Design and 6 students from the Massachusetts Institute of Technology participated in a 10-week Global Leadership Program (GLP) in Cambridge, ...
  • Bochkis, Irina M.; Przybylski, Dariusz; Chen, Jennifer; Regev, Aviv (Elsevier B.V., 2014-11)
    Aging is accompanied by physiological impairments, which, in insulin-responsive tissues, including the liver, predispose individuals to metabolic disease. However, the molecular mechanisms underlying these changes remain ...
  • Donohue, Julie; O'Malley, A. James; Horvitz-Lennon, Marcela; Taub, Anna Levine; Berndt, Ernst R.; Huskamp, Haiden A. (American Psychiatric Publishing, 2014-03)
    Objective Physician antipsychotic prescribing behavior may be influenced by comparative effectiveness evidence, regulatory warnings, and formulary and other restrictions on these drugs. This study measured changes in the ...
  • Li, A.; Zhou, C.; Moore, J.; Zhang, P.; Tsai, Tsung-Han; Lee, Hsiang-Chieh; Romano, D. M.; McKee, M. L.; Schoenfeld, D. A.; Serra, M. J.; Raygor, K.; Cantiello, H. F.; Fujimoto, James G.; Tanzi, R. E. (Bentham Science Publishers, 2011-05)
    Mutations in the presenilin genes cause the majority of early-onset familial Alzheimer’s disease. Recently, presenilin mutations have been identified in patients with dilated cardiomyopathy (DCM), a common cause of heart ...
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