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A measurement of the calorimeter response to single hadrons and determination of the jet energy scale uncertainty using LHC Run-1 pp-collision data with the ATLAS detector.

European Physical Journal C: Particles and Fields Springer Verlag 77:1 (2017) 26

Authors:

M Aaboud, G Aad, B Abbott, Giacomo Artoni, Alan Barr, A Kathrin Becker, Lydia A Beresford, Daniela Bortoletto, Jonathan TP Burr, Amanda M Cooper-Sarkar, M Crispin Ortuzar, William J Fawcett, James A Frost, Elizabeth J Gallas, Francesco Giuli, S Gupta, Claire Gwenlan, Christopher P Hays, J Henderson, B Todd Huffman, Cigdem Issever, C William Kalderon, Koichi Nagai, Richard B Nickerson, Nurfikri Norjoharuddeen, Mariyan B Petrov, Mark Pickering, V Radescu, Jeffrey C-L Tseng, Georg HA Viehhauser, Luigi Vigani, Anthony R Weidberg, Jiahang Zhong

Abstract:

A measurement of the calorimeter response to isolated charged hadrons in the ATLAS detector at the LHC is presented. This measurement is performed with 3.2 nb[Formula: see text] of proton-proton collision data at [Formula: see text] [Formula: see text] from 2010 and 0.1 nb[Formula: see text] of data at [Formula: see text] [Formula: see text] from 2012. A number of aspects of the calorimeter response to isolated hadrons are explored. After accounting for energy deposited by neutral particles, there is a 5% discrepancy in the modelling, using various sets of Geant4 hadronic physics models, of the calorimeter response to isolated charged hadrons in the central calorimeter region. The description of the response to anti-protons at low momenta is found to be improved with respect to previous analyses. The electromagnetic and hadronic calorimeters are also examined separately, and the detector simulation is found to describe the response in the hadronic calorimeter well. The jet energy scale uncertainty and correlations in scale between jets of different momenta and pseudorapidity are derived based on these studies. The uncertainty is 2-5% for jets with transverse momenta above 2 [Formula: see text], where this method provides the jet energy scale uncertainty for ATLAS.
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The interstellar medium in high-redshift submillimeter galaxies as probed by infrared spectroscopy

(2017)

Authors:

Julie L Wardlow, Asantha Cooray, Willow Osage, Nathan Bourne, David Clements, Helmut Dannerbauer, Loretta Dunne, Simon Dye, Steve Eales, Duncan Farrah, Cristina Furlanetto, Edo Ibar, Rob Ivison, Steve Maddox, Michał M Michałowski, Dominik Riechers, Dimitra Rigopoulou, Douglas Scott, Matthew WL Smith, Lingyu Wang, Paul van der Werf, Elisabetta Valiante, Ivan Valtchanov, Aprajita Verma
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Complexity in the light curves and spectra of slow-evolving superluminous supernovae

(2017)

Authors:

C Inserra, M Nicholl, T-W Chen, A Jerkstrand, SJ Smartt, T Krühler, JP Anderson, C Baltay, M Della Valle, M Fraser, A Gal-Yam, L Galbany, E Kankare, K Maguire, D Rabinowitz, K Smith, S Valenti, DR Young
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Measuring the expansion velocity of the outflows of LS I +61 303 through low-frequency radio observations

AIP Conference Proceedings AIP Publishing 1792:1 (2017) 040018

Authors:

B Marcote, M Ribó, JM Paredes, CH Ishwara-Chandra, JD Swinbank, JW Broderick, S Markoff, R Fender, RAMJ Wijers, GG Pooley, AJ Stewart, ME Bell, RP Breton, D Carbone, S Corbel, J Eislöffel, H Falcke, J-M Grießmeier, M Kuniyoshi, M Pietka, A Rowlinson, M Serylak, AJ van der Horst, J van Leeuwen, MW Wise, P Zarka
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ERIS, first generation becoming second generation, or re-vitalizing an AO instrument

Adaptive Optics for Extremely Large Telescopes, 2017 AO4ELT5 2017-June (2017)

Authors:

A Cortes, R Davies, H Feutchgruber, E Sturm, M Hartl, F Eisenhauer, H Huber, E Wiezorrek, M Plattner, A Buron, J Schubert, S Gillessen, C Rau, N Förster-Schreiber, A Baruffalo, B Salasnich, D Fatinel, S Esposito, A Riccardi, G Agapito, JV Biliotti, R Briguglio, L Carbonaro, A Puglisi, M Xompero, G Cresci, C Giordano, F Mannucci, D Ferruzzi, D Pearson, W Taylor, C Waring, M MacIntosh, D Lunney, D Henry, J Lightfood, X Gao, B Biller, S Quanz, A Glauser, H Schmid, S March, J Kuehn, M Kenworthy, C Keller, F Snik, M Dolci, A Valentino, A Di Cianno, G Di Rico, M Kasper, H Kuntschner, A Glindemann, R Dorn, H Jeroen

Abstract:

Within the VLT instrumentation program, the second generation instrument ERIS (Enhanced Resolution Imager and Spectrograph) combines two key scientifically successful elements of the VLT first generation instrumentation program: It consists of a full renovation of the integral field spectrograph SPIFFI and a new near-IR camera NIX, implementing the most scientifically important imaging modes offered so far by NACO (imaging in the J to M bands, astrometry, Sparse Aperture Masking and Apodizing Phase Plate (APP) coronagraphy). Both diffraction limited sub-systems of ERIS make use of the latest AO technologies with the newly installed AOF (AO Facility) Deformable Secondary Mirror with 1170 actuators and a new laser guide star system. We will describe the changes that will be implemented, give a summary of what SINFONI is currently achieving, and present what to expect from the performance upgrade. With instruments becoming more complex and therefore increasing development times, we describe the challenges to improve image quality, spectral and spatial resolution on the same focus of a VLT UT, which could become valuable lessons for the extension of the life of actual instruments and of future ones. We will address the impact of the aging of the instrument and what critical parts to consider in the design in view of future upgrades, to possibly extend the performances, capabilities and lifetime at lower development costs.