Periodic Bursts of Coherent Radio Emission from an Ultracool Dwarf

We report the detection of periodic (p = 1.96 hours) bursts of extremely bright, 100% circularly polarized, coherent radio emission from the M9 dwarf TVLM 513-46546. Simultaneous photometric monitoring observations have established this periodicity to be the rotation period of the dwarf. These bursts, which were not present in previous observations of this target, confirm that ultracool dwarfs can generate persistent levels of broadband, coherent radio emission, associated with the presence of kG magnetic fields in a large-scale, stable configuration. Compact sources located at the magnetic polar regions produce highly beamed emission generated by the electron cyclotron maser instability, the same mechanism known to generate planetary coherent radio emission in our solar system. The narrow beams of radiation pass our line of sight as the dwarf rotates, producing the associated periodic bursts. The resulting radio light curves are analogous to the periodic light curves associated with pulsar radio emission highlighting TVLM 513-46546 as the prototype of a new class of transient radio source.Comment: 12 pages, 3 figures, accepted for publication in ApJ Letter

ФОНД ГАРАНТУВАННЯ ВКЛАДІВ ФІЗИЧНИХ ОСІБ ЯК СУБ’ЄКТ КОНТРОЛЮ ЗА ДІЯЛЬНІСТЮ БАНКІВ В УКРАЇНІ

The authors of the article have researched the features of regulatory activity of the Deposits Guarantee Fund within the system of guaranteeing deposits of individuals. The problems of the formation of the resource base of the Deposits Guarantee Fund have been determined. In order to increase the funds of the Deposits Guarantee Fund and to facilitate the timely fulfillment of obligations in regard to the reimbursement of deposits in case of the withdrawal of the license and liquidation of the bank, the authors have suggested to change the approach of calculating the regular differentiated fee.Some aspects of control over the activities of banks by the Deposits Guarantee Fund have been considered; the authors have also defined the tools of its control activity. The shortcomings of the application of sanctions by the Deposits Guarantee Fund for the banks violation of the legislation have been established. The authors have conducted the distinction between sanctions and precautionary measures that do not have negative consequences for the subject of the commission of the offense.The authors have offered to refer a fine and an order to eliminate violations of the legislation on the system of guaranteeing deposits of individuals to administrative and economic sanctions applied by the Deposits Guarantee Fund to Banks, and to include a written reservation to preventive measures of influence. It has been emphasized that sanctions have negative consequences for offenders while enforcement actions are aimed at making a note of warning for the bank.The authors have formulated own definition of control over the activities of banks by the Deposits Guarantee Fund. It has been concluded that the instruments of control over the activities of banks by the Deposits Guarantee Fund are: documentary and factual verifications of banks, requests for information, administrative and economic sanctions. It has been established that the Fund’s control over the activities of banks is the management activity that is implemented within the framework of the regulatory activity of the Fund.Исследованы особенности регуляторной деятельности Фонда гарантирования вкладов физических лиц в системе гарантирования вкладов физических лиц. Определены проблемы формирования ресурсной базы Фонда гарантирования вкладов физических лиц. Рассмотрены отдельные аспекты контроля за деятельностью банков со стороны Фонда гарантирования вкладов физических лиц, а также определены инструменты его контрольной деятельности. Установлены недостатки применения санкций Фондом гарантирования вкладов физических лиц за нарушение законодательства банками.Досліджено особливості регуляторної діяльності Фонду гарантування вкладів фізичних осіб у системі гарантування вкладів фізичних осіб. Визначено проблеми формування ресурсної бази Фонду гарантування вкладів фізичних осіб. З метою збільшення коштів Фонду гарантування вкладів фізичних осіб і сприяння своєчасному виконанню зобов’язань щодо відшкодування вкладів у разі відкликання ліцензії та ліквідації банку запропоновано змінити підхід до обчислення регулярного диференційованого збору.Розглянуто окремі аспекти контролю за діяльністю банків з боку Фонду гарантування вкладів фізичних осіб, а також визначено інструменти його контрольної діяльності. Установлено недоліки застосування санкцій Фондом гарантування вкладів фізичних осіб за порушення законодавства банками. Проведено розмежовування санкцій і заходів попереджувального характеру, що не завдають негативних наслідків для суб’єкта вчинення правопорушення.Запропоновано до адміністративно-господарських санкцій, що застосовує Фонд гарантування вкладів фізичних осіб до банків, відносити штраф і розпорядження про усунення порушень законодавства про систему гарантування вкладів фізичних осіб, а письмове застереження відносити до попереджувальних заходів впливу. Наголошено, що санкції мають негативні наслідки для правопорушника, у той час, коли заходи впливу спрямовані на попередження банків.Сформульовано авторське визначення контролю за діяльністю банків з боку Фонду гарантування вкладів фізичних осіб. Зроблено висновок, що інструментами контролю за діяльністю банків з боку Фонду гарантування вкладів фізичних осіб є: документальні та фактичні перевірки банків, запити про надання інформації, адміністративно-господарські санкції. Установлено, що контроль з боку Фонду за діяльністю банків є управлінською діяльністю, яка реалізується в межах регулятивної діяльності Фонду

Confirmation of the Electron Cyclotron Maser Instability as the Dominant Source of Radio Emission from Very Low Mass Stars and Brown Dwarfs

We report on radio observations of the M8.5 dwarf LSR J1835+3259 and the L3.5 dwarf 2MASS J00361617+1821104, which provide the strongest evidence to date that the electron cyclotron maser instability is the dominant mechanism producing radio emission in the magnetospheres of ultracool dwarfs. As has previously been reported for the M9 dwarf TVLM 513-46546, periodic pulses of 100% circularly polarized, coherent radio emission are detected from both dwarfs with periods of 2.84 +/- 0.01 and 3.08 +/- 0.05 hours respectively for LSR J1835+3259 and 2MASS J00361617+1821104. Importantly, periodic unpolarized radio emission is also detected from 2MASS J00361617+1821104, and brightness temperature limitations rule out gyrosynchrotron radiation as a source of this radio emission. The unpolarized emission from this and other ultracool dwarfs is also attributed to electron cyclotron maser emission, which has become depolarized on traversing the ultracool dwarf magnetosphere, possibly due to propagations effects such as scattering. Based on available v sin i data in the literature and rotation periods derived from the periodic radio data for the three confirmed sources of electron cyclotron maser emission, TVLM 513-46546, LSR J1835+3259 and 2MASS J00361617+1821104, we determine that the rotation axes of all three dwarfs are close to perpendicular to our line of sight. This suggests a possible geometrical selection effect due to the inherent directivity of electron cyclotron maser emission, that may account for the previously reported relationship between radio activity and v sin i observed for ultracool dwarfs. We also determine the radius of the dwarf LSR J1835+3259 to be > 0.117 +/- 0.012 R_Sol. (abridged)Comment: 11 pages, 2 tables, 4 figures, accepted for publication in Ap

Baby MIND: A magnetised spectrometer for the WAGASCI experiment

The WAGASCI experiment being built at the J-PARC neutrino beam line will measure the difference in cross sections from neutrinos interacting with a water and scintillator targets, in order to constrain neutrino cross sections, essential for the T2K neutrino oscillation measurements. A prototype Magnetised Iron Neutrino Detector (MIND), called Baby MIND, is being constructed at CERN to act as a magnetic spectrometer behind the main WAGASCI target to be able to measure the charge and momentum of the outgoing muon from neutrino charged current interactions.Comment: Poster presented at NuPhys2016 (London, 12-14 December 2016). Title + 4 pages, LaTeX, 6 figure

Baby MIND Experiment Construction Status

Baby MIND is a magnetized iron neutrino detector, with novel design features, and is planned to serve as a downstream magnetized muon spectrometer for the WAGASCI experiment on the T2K neutrino beam line in Japan. One of the main goals of this experiment is to reduce systematic uncertainties relevant to CP-violation searches, by measuring the neutrino contamination in the anti-neutrino beam mode of T2K. Baby MIND is currently being constructed at CERN, and is planned to be operational in Japan in October 2017.Comment: Poster presented at NuPhys2016 (London, 12-14 December 2016). 4 pages, LaTeX, 7 figure

Synchronization of the Distributed Readout Frontend Electronics of the Baby MIND Detector

Baby MIND is a new downstream muon range detector for the WGASCI experiment. This article discusses the distributed readout system and its timing requirements. The paper presents the design of the synchronization subsystem and the results of its test

Baby MIND: A magnetized segmented neutrino detector for the WAGASCI experiment

T2K (Tokai-to-Kamioka) is a long-baseline neutrino experiment in Japan designed to study various parameters of neutrino oscillations. A near detector complex (ND280) is located 280~m downstream of the production target and measures neutrino beam parameters before any oscillations occur. ND280's measurements are used to predict the number and spectra of neutrinos in the Super-Kamiokande detector at the distance of 295~km. The difference in the target material between the far (water) and near (scintillator, hydrocarbon) detectors leads to the main non-cancelling systematic uncertainty for the oscillation analysis. In order to reduce this uncertainty a new WAter-Grid-And-SCintillator detector (WAGASCI) has been developed. A magnetized iron neutrino detector (Baby MIND) will be used to measure momentum and charge identification of the outgoing muons from charged current interactions. The Baby MIND modules are composed of magnetized iron plates and long plastic scintillator bars read out at the both ends with wavelength shifting fibers and silicon photomultipliers. The front-end electronics board has been developed to perform the readout and digitization of the signals from the scintillator bars. Detector elements were tested with cosmic rays and in the PS beam at CERN. The obtained results are presented in this paper.Comment: In new version: modified both plots of Fig.1 and added one sentence in the introduction part explaining Baby MIND role in WAGASCI experiment, added information for the affiliation

Genetic diversity of potato varieties bred in Russia and near-abroad countries based on polymorphism of SSR-loci and markers associated with resistance R-genes

The genetic diversity of potato varieties from the VIR collection was analyzed based on microsatellite analysis. These varieties have been bred in Russia and near-abroad countries since the 1931. Application of 14 highly polymorphic nuclear microsatellites (SSR) enabled the complete discrimination of all 113 varieties. Additionally, we have studied these varieties for the distribution of 8 DNA markers associated with three R-genes involved in the control of resistance to two quarantine objects: the potato wart Synchytrium endobioticum and golden potato cyst nematode Globodera rostochiensis, which occur locally in some regions of the Russian Federation. All the analyzed varieties with resistance to S. endobioticum pathotype 1 revealed the diagnostic marker Nl-251400 of the Sen1 gene and a few susceptible cultivars lost this diagnostic fragment. The tested markers of the H1 and Gro1-4 genes, which confer resistance to G. rostochiensis pathotype Ro1 revealed different predictiveness. In the molecular screening of potato varieties, it is better to use several markers of these genes. Results of molecular screening using six markers of the H1 and Gro1-4 genes allowed us to detect 6 haplotypes in the tested subset. Five haplotypes include varieties with different combinations of the markers tested, the majority (87.9 %) of these varieties were highly resistant or moderately resistant to G. rostochiensis. The most numerous haplotype H1/0 included 76 varieties, which did not possess any marker; 96.1 % of these varieties were susceptible to G. rostochiensis. Predictive associations between haplotype content, wart and nematode resistance, pedigree and ‘variety age’ are discussed

Ancient human mitochondrial genomes from Bronze Age Bulgaria: new insights into the genetic history of Thracians

Abstract One of the best documented Indo-European civilizations that inhabited Bulgaria is the Thracians, who lasted for more than five millennia and whose origin and relationships with other past and present-day populations are debated among researchers. Here we report 25 new complete mitochondrial genomes of ancient individuals coming from three necropolises located in different regions of Bulgaria – Shekerdja mogila, Gabrova mogila and Bereketska mogila – dated to II-III millennium BC. The identified mtDNA haplogroup composition reflects the mitochondrial variability of Western Eurasia. In particular, within the ancient Eurasian genetic landscape, Thracians locate in an intermediate position between Early Neolithic farmers and Late Neolithic-Bronze Age steppe pastoralists, supporting the scenario that the Balkan region has been a link between Eastern Europe and the Mediterranean since the prehistoric time. Spatial Principal Component Analysis (sPCA) performed on Thracian and modern mtDNA sequences, confirms the pattern highlighted on ancient populations, overall indicating that the maternal gene pool of Thracians reflects their central geographical position at the gateway of Europe