0000000001300205
AUTHOR
A. Ghosh
Mineralogy of volcanic rocks in Gusev Crater, Mars: Reconciling Mössbauer, Alpha Particle X-ray Spectrometer, and Miniature Thermal Emission Spectrometer spectra
Complete sets of mineral abundances for relatively unaltered volcanic or volcaniclastic rocks in Gusev Crater have been determined by modeling Mössbauer subspectral areas as mineral weight percentages, and combining those percentages with the proportions of iron-free minerals not detected by Mössbauer (normative plagioclase, apatite, and chromite, as calculated from Alpha Particle X-Ray Spectrometer (APXS) chemical analyses). Comparisons of synthetic thermal emission spectra calculated for these mineral modes with measured Miniature Thermal Emission Spectrometer (Mini-TES) spectra for the same rock classes show either good agreements or discrepancies that we attribute to sodic pla…
Examining the generalizability of research findings from archival data
This research project benefitted from Ministry of Education (Singapore) Tier 1 Grant R-313-000-131-115 (to A. Delios), National Science Foundation of China Grants 72002158 (to H.T.) and 71810107002 (to H.T.), grants from the Knut and Alice Wallenberg Foundation (to A. Dreber) and the Marianne and Marcus Wallenberg Foundation (through a Wallenberg Scholar grant; to A. Dreber), Austrian Science Fund (FWF) Grant SFB F63 (to A. Dreber), grants from the Jan Wallander and Tom Hedelius Foundation (Svenska Handelsbankens Forskningsstiftelser; to A. Dreber), and an Research & Development (R&D) research grant from Institut Européen d'Administration des Affaires (INSEAD) (to E.L.U.). Dmitrii Dubrov, o…
Basaltic Rocks Analyzed by the Spirit Rover in Gusev Crater
The Spirit landing site in Gusev Crater on Mars contains dark, fine-grained, vesicular rocks interpreted as lavas. Pancam and MiniâThermal Emission Spectrometer (Mini-TES) spectra suggest that all of these rocks are similar but have variable coatings and dust mantles. Magnified images of brushed and abraded rock surfaces show alteration rinds and veins. Rock interiors contain â¤25% megacrysts. Chemical analyses of rocks by the Alpha Particle X-ray Spectrometer are consistent with picritic basalts, containing normative olivine, pyroxenes, plagioclase, and accessory FeTi oxides. MoÌssbauer, Pancam, and Mini-TES spectra confirm the presence of olivine, magnetite, and probably pyroxene. The…
Beam test results of IHEP-NDL Low Gain Avalanche Detectors(LGAD)
A High-Granularity Timing Detector (HGTD) is proposed based on the Low-Gain Avalanche Detector (LGAD) for the ATLAS experiment to satisfy the time resolution requirement for the up-coming High Luminosity at LHC (HL-LHC). We report on beam test results for two proto-types LGADs (BV60 and BV170) developed for the HGTD. Such modules were manufactured by the Institute of High Energy Physics (IHEP) of Chinese Academy of Sciences (CAS) collaborated with Novel Device Laboratory (NDL) of the Beijing Normal University. The beam tests were performed with 5 GeV electron beam at DESY. The timing performance of the LGADs was compared to a trigger counter consisting of a quartz bar coupled to a SiPM read…
Provenance and diagenesis of the evaporite-bearing Burns formation, Meridiani Planum, Mars
Abstract Impure reworked evaporitic sandstones, preserved on Meridiani Planum, Mars, are mixtures of roughly equal amounts of altered siliciclastic debris, of basaltic provenance (40 ± 10% by mass), and chemical constituents, dominated by evaporitic minerals (jarosite, Mg-, Ca-sulfates ± chlorides ± Fe-, Na-sulfates), hematite and possibly secondary silica (60 ± 10%). These chemical constituents and their relative abundances are not an equilibrium evaporite assemblage and to a substantial degree have been reworked by aeolian and subaqueous transport. Ultimately they formed by evaporation of acidic waters derived from interaction with olivine-bearing basalts and subsequent diagenetic alterat…
Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger
The PreProcessor of the ATLAS Level-1 Calorimeter Trigger prepares the analogue trigger signals sent from the ATLAS calorimeters by digitising, synchronising, and calibrating them to reconstruct transverse energy deposits, which are then used in further processing to identify event features. During the first long shutdown of the LHC from 2013 to 2014, the central components of the PreProcessor, the Multichip Modules, were replaced by upgraded versions that feature modern ADC and FPGA technology to ensure optimal performance in the high pile-up environment of LHC Run 2. This paper describes the features of the newMultichip Modules along with the improvements to the signal processing achieved.
Characterization and petrologic interpretation of olivine-rich basalts at Gusev Crater, Mars
Rocks on the floor of Gusev crater are basalts of uniform composition and mineralogy. Olivine, the only mineral to have been identified or inferred from data by all instruments on the Spirit rover, is especially abundant in these rocks. These picritic basalts are similar in many respects to certain Martian meteorites (olivine-phyric shergottites). The olivine megacrysts in both have intermediate compositions, with modal abundances ranging up to 20-30%. Associated minerals in both include low-calcium and high-calcium pyroxenes, plagioclase of intermediate composition, iron-titanium-chromium oxides, and phosphate. These rocks also share minor element trends, reflected in their nickel-magnesiu…
Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS
The observation of forward proton scattering in association with lepton pairs (eþe− þ p or μþμ− þ p) produced via photon fusion is presented. The scattered proton is detected by the ATLAS Forward Proton spectrometer, while the leptons are reconstructed by the central ATLAS detector. Proton-proton collision data recorded in 2017 at a center-of-mass energy of ffiffiffi s p ¼ 13 TeV are analyzed, corresponding to an integrated luminosity of 14.6 fb−1. A total of 57 (123) candidates in the ee þ p (μμ þ p) final state are selected, allowing the background-only hypothesis to be rejected with a significance exceeding 5 standard deviations in each channel. Proton-tagging techniques are introduced f…
An integrated view of the chemistry and mineralogy of martian soils
The mineralogical and elemental compositions of the martian soil are indicators of chemical and physical weathering processes. Using data from the Mars Exploration Rovers, we show that bright dust deposits on opposite sides of the planet are part of a global unit and not dominated by the composition of local rocks. Dark soil deposits at both sites have similar basaltic mineralogies, and could reflect either a global component or the general similarity in the compositions of the rocks from which they were derived. Increased levels of bromine are consistent with mobilization of soluble salts by thin films of liquid water, but the presence of olivine in analysed soil samples indicates that the…
CCDC 741861: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|5848|doi:10.1021/ic9001863
CCDC 833841: Experimental Crystal Structure Determination
Related Article: S.Biswas, S.Naiya, C.J.Gomez-Garcia, A.Ghosh|2012|Dalton Trans.|41|462|doi:10.1039/c1dt11333j
CCDC 741859: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|5848|doi:10.1021/ic9001863
CCDC 892161: Experimental Crystal Structure Determination
Related Article: S.Naiya, S.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2012|Inorg.Chem.|51|5332|doi:10.1021/ic300274n
CCDC 810765: Experimental Crystal Structure Determination
Related Article: S.Naiya, S.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2011|Inorg.Chim.Acta|377|26|doi:10.1016/j.ica.2011.07.027
CCDC 891666: Experimental Crystal Structure Determination
Related Article: P.Kar, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2013|Polyhedron|50|229|doi:10.1016/j.poly.2012.10.036
CCDC 789092: Experimental Crystal Structure Determination
Related Article: S.Naiya, C.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, J.M.Clemente-Juan, A.Ghosh|2010|Inorg.Chem.|49|6616|doi:10.1021/ic1005456
CCDC 891664: Experimental Crystal Structure Determination
Related Article: P.Kar, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2013|Polyhedron|50|229|doi:10.1016/j.poly.2012.10.036
CCDC 833843: Experimental Crystal Structure Determination
Related Article: S.Biswas, S.Naiya, C.J.Gomez-Garcia, A.Ghosh|2012|Dalton Trans.|41|462|doi:10.1039/c1dt11333j
CCDC 810450: Experimental Crystal Structure Determination
Related Article: A.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2010|Inorg.Chem.|49|8155|doi:10.1021/ic101183n
CCDC 789093: Experimental Crystal Structure Determination
Related Article: S.Naiya, C.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, J.M.Clemente-Juan, A.Ghosh|2010|Inorg.Chem.|49|6616|doi:10.1021/ic1005456
CCDC 833842: Experimental Crystal Structure Determination
Related Article: S.Biswas, S.Naiya, C.J.Gomez-Garcia, A.Ghosh|2012|Dalton Trans.|41|462|doi:10.1039/c1dt11333j
CCDC 810767: Experimental Crystal Structure Determination
Related Article: S.Naiya, S.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2011|Inorg.Chim.Acta|377|26|doi:10.1016/j.ica.2011.07.027
CCDC 892160: Experimental Crystal Structure Determination
Related Article: S.Naiya, S.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2012|Inorg.Chem.|51|5332|doi:10.1021/ic300274n
CCDC 741858: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|5848|doi:10.1021/ic9001863
CCDC 741860: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|5848|doi:10.1021/ic9001863
CCDC 810766: Experimental Crystal Structure Determination
Related Article: S.Naiya, S.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2011|Inorg.Chim.Acta|377|26|doi:10.1016/j.ica.2011.07.027
CCDC 833844: Experimental Crystal Structure Determination
Related Article: S.Biswas, S.Naiya, C.J.Gomez-Garcia, A.Ghosh|2012|Dalton Trans.|41|462|doi:10.1039/c1dt11333j
CCDC 741857: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|5848|doi:10.1021/ic9001863
CCDC 737124: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|4817|doi:10.1021/ic802385c
CCDC 716246: Experimental Crystal Structure Determination
Related Article: B.Sarkar, S.Konar, C.J.Gomez-Garcia, A.Ghosh|2008|Inorg.Chem.|47|11611|doi:10.1021/ic8011519
CCDC 716247: Experimental Crystal Structure Determination
Related Article: B.Sarkar, S.Konar, C.J.Gomez-Garcia, A.Ghosh|2008|Inorg.Chem.|47|11611|doi:10.1021/ic8011519
CCDC 170243: Experimental Crystal Structure Determination
Related Article: R.Bhattacharya, A.Ghosh, M.S.Ray, L.Righi, G.Bocelli, S.Chaudhuri, R.D.Willett, J.M.Clemente-Juan, E.Coronado, C.J.Gomez-Garcia|2003|Eur.J.Inorg.Chem.||4253|doi:10.1002/ejic.200300110
CCDC 810449: Experimental Crystal Structure Determination
Related Article: A.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2010|Inorg.Chem.|49|8155|doi:10.1021/ic101183n
CCDC 789094: Experimental Crystal Structure Determination
Related Article: S.Naiya, C.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, J.M.Clemente-Juan, A.Ghosh|2010|Inorg.Chem.|49|6616|doi:10.1021/ic1005456
CCDC 737125: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|4817|doi:10.1021/ic802385c
CCDC 716248: Experimental Crystal Structure Determination
Related Article: B.Sarkar, S.Konar, C.J.Gomez-Garcia, A.Ghosh|2008|Inorg.Chem.|47|11611|doi:10.1021/ic8011519
CCDC 891665: Experimental Crystal Structure Determination
Related Article: P.Kar, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2013|Polyhedron|50|229|doi:10.1016/j.poly.2012.10.036
Search for GW signals associated with GRBs
We present the results of targeted searches for gravitational-wave transients associated with gamma-ray bursts during the second observing run of Advanced LIGO and Advanced Virgo, which took place from 2016 November to 2017 August. We have analyzed 98 gamma-ray bursts using an unmodeled search method that searches for generic transient gravitational waves and 42 with a modeled search method that targets compact-binary mergers as progenitors of short gamma-ray bursts. Both methods clearly detect the previously reported binary merger signal GW170817, with p-values of <9.38x10^-6^ (modeled) and 3.1x10^-4^ (unmodeled). We do not find any significant evidence for gravitational-wave signals assoc…
CCDC 737123: Experimental Crystal Structure Determination
Related Article: P.Mukherjee, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2009|Inorg.Chem.|48|4817|doi:10.1021/ic802385c
CCDC 891663: Experimental Crystal Structure Determination
Related Article: P.Kar, M.G.B.Drew, C.J.Gomez-Garcia, A.Ghosh|2013|Polyhedron|50|229|doi:10.1016/j.poly.2012.10.036
CCDC 883016: Experimental Crystal Structure Determination
Related Article: P.Kar, R.Haldar, C.J.Gomez-Garcia, A.Ghosh|2012|Inorg.Chem.|51|4265|doi:10.1021/ic2027362
CCDC 789091: Experimental Crystal Structure Determination
Related Article: S.Naiya, C.Biswas, M.G.B.Drew, C.J.Gomez-Garcia, J.M.Clemente-Juan, A.Ghosh|2010|Inorg.Chem.|49|6616|doi:10.1021/ic1005456