1 Ocak 2021 Dergi makalesi Açık Erişim

Kaneko, Yuki; Gogus, Ersin; Baring, Matthew G.; Kouveliotou, Chryssa; Lin, Lin; Roberts, Oliver J.; van der Horst, Alexander J.; Younes, George; Keskin, Ozge; Coban, Omer Faruk

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    "creators": [
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        "affiliation": "Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey", 
        "name": "Kaneko, Yuki"
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      {
        "affiliation": "Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey", 
        "name": "Gogus, Ersin"
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      {
        "affiliation": "Rice Univ, Dept Phys & Astron, MS 108,6100 Main St, Houston, TX 77251 USA", 
        "name": "Baring, Matthew G."
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      {
        "name": "Kouveliotou, Chryssa"
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      {
        "affiliation": "Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China", 
        "name": "Lin, Lin"
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      {
        "affiliation": "Univ Space & Res Assoc, Sci & Technol Inst, 320 Sparkman Dr, Huntsville, AL 35805 USA", 
        "name": "Roberts, Oliver J."
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      {
        "name": "van der Horst, Alexander J."
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      {
        "name": "Younes, George"
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      {
        "affiliation": "Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey", 
        "name": "Keskin, Ozge"
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      {
        "affiliation": "Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey", 
        "name": "Coban, Omer Faruk"
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    "description": "During 2020 April and May, SGR J1935+2154 emitted hundreds of short bursts and became one of the most prolific transient magnetars. At the onset of the active bursting period, a 130 s burst \"forest,\" which included some bursts with peculiar time profiles, were observed with the Fermi/Gamma-ray Burst Monitor (GBM). In this Letter, we present the results of time-resolved spectral analysis of this burst \"forest\" episode, which occurred on 2020 April 27. We identify thermal spectral components prevalent during the entire 130 s episode; high-energy maxima appear during the photon flux peaks, which are modulated by the spin period of the source. Moreover, the evolution of the nu F (nu) spectral hardness (represented by E (peak) or blackbody temperature) within the lightcurve peaks is anti-correlated with the pulse phases extrapolated from the pulsation observed within the persistent soft X-ray emission of the source six hours later. Throughout the episode, the emitting area of the high-energy (hotter) component is 1-2 orders of magnitude smaller than that for the low-energy component. We interpret this with a geometrical viewing angle scenario, inferring that the high-energy component likely originates from a low-altitude hotspot located within closed toroidal magnetic field lines.", 
    "doi": "10.3847/2041-8213/ac0fe7", 
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      "title": "ASTROPHYSICAL JOURNAL LETTERS", 
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      "title": "Dergi makalesi", 
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    "science_branches": [
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    "title": "Fermi/GBM Observations of the SGRJ1935+2154 Burst Forest"
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