RT Book, Section T1 A prototype for the Real-Time analysis of the Cherenkov Telescope Array A1 Contreras González, José Luis AB The Cherenkov Telescope Array (CTA) observatory will be one of the biggest ground-based very-high-energy (VHE) gamma-ray observatory. CTA will achieve a factor of 10 improvement in sensitivity from some tens of GeV to beyond 100 TeV with respect to existing telescopes. The CTA observatory will be capable of issuing alerts on variable and transient sources to maximize the scientific return. To capture these phenomena during their evolution and for effective communication to the astrophysical community, speed is crucial. This requires a system with a reliable automated trigger that can issue alerts immediately upon detection of gamma-ray flares. This will be accomplished by means of a Real-Time Analysis (RTA) pipeline, a key system of the CTA observatory. The latency and sensitivity requirements of the alarm system impose a challenge because of the anticipated large data rate, between 0.5 and 8 GB/s. As a consequence, substantial efforts toward the optimization of high-throughput computing service are envisioned. For these reasons our working group has started the development of a prototype of the Real-Time Analysis pipeline. The main goals of this prototype are to test: (i) a set of frameworks and design patterns useful for the inter-process communication between software processes running on memory; (ii) the sustainability of the foreseen CTA data rate in terms of data throughput with different hardware (e.g. accelerators) and software configurations, (iii) the reuse of non-real-time algorithms or how much we need to simplify algorithms to be compliant with CTA requirements, (iv) interface issues between the different CTA systems. In this work we focus on goals (i) and (ii). PB SPIE-Int Soc Optical Engineering SN 978-0-8194-9613-3 YR 2014 FD 2014 LK https://hdl.handle.net/20.500.14352/35759 UL https://hdl.handle.net/20.500.14352/35759 LA eng NO 1. Actis, M., et al., “Design concepts for the Cherenkov Telescope Array CTA: an advanced facility for groundbased high-energy gamma-ray astronomy,” Experimental Astronomy 32, 193–316 (Dec. 2011)2. Acharya, B.S., et al., “Introducing the CTA concept”, Astroparticle Physics 43, 3–18 (2013)3. A. Zech et al., Fermi Proceedings eConf C1111101 arXiv:1205.1459v1 (2012)4. H.E.S.S. Collab.: Aharonian, F. et al., “Observations of the crab nebula with hess,” A&A 457, 899 (2006).5. MAGIC Collab.: Albert, J. et al., “Vhe gamma-ray observation of the crab nebula and its pulsar with the magic telescope,” ApJ 674, 1037 (2008).6. VERITAS Collab.: Acciari, V. A. et al., “Veritas observations of the -ray binary ls i +61 303,” ApJ 679, 1427 (2008).7. Bulgarelli, A., et al., "The Real-Time Analysis of the Cherenkov Telescope Array Observatory", 33rd. International Cosmic Ray Conference, Rio de Janeiro (Brazil), (2013)8. S. Funk, “Online Analysis of Gamma-ray Sources with H.E.S.S.” Ph.D. dissertation, Humboldt University of Berlin, (2005).9. D. Tescaro, et al., “The MAGIC telescopes DAQ software and on-the-fly online analysis client.” 33rd. International Cosmic Ray Conference, Rio de Janeiro (Brazil), (2013).10. H. Krawczynski, M. Olevitch, G. Sembroski, and K. Gibbs, “Control Software for the VERITAS Cherenkov Telescope System,” pp. 2843–2846, (2003).11. J. S. Perkins, “Control, Monitoring and Analysis Software for the VERITAS Array,” AIP Conf. Proc., vol. 921, pp. 564–565, (2007).12. A. Bulgarelli, et al., “The AGILE Alert System for Gamma-Ray Transients,” The Astrophysical Journal, vol. 781, no. 1, p. 19, 2014.13. J. Rodríguez-Vázquez, J.L. Vázquez-Poletti, C. Delgado, A. Bulgarelli and M. Cárdenas-Montes, “Performance evaluation of a signal extraction algorithm for the Cherenkov Telescope Array’s Real Time Analysis pipeline”, IEEE Cluster Conference, (2014)14. Bulgarelli, A., Gianotti, F., and Trifoglio, M., “PacketLib: A C++ Library for Scientific Satellite Telemetry Applications,” Astronomical Data Analysis Software and Systems XII ASP Conference Series, 295, (2003).15. Conforti, V., et al., “The ASTRI SST-2M telescope prototype for the Cherenkov Telescope Array. Camera DAQ Software Architecture”, these proceedings16. K. Bernlöhr et al., “Monte Carlo design studies for the Cherenkov Telescope Array”, Astroparticle Physics 43 171–188 (2013)17. G. Meier, “A short description of an evndisplay-based CTA analysis”, CTA Internal note18. J. Albert, et al., “FADC signal reconstruction for the MAGIC telescope,” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 594, no. 3, pp. 407 – 419, (2008).19. M. P. Arribas, et al., “Trigger and data rates expected for the CTA Observatory”, arXiv:1211.3061v120. Schwarz, J., Farris, A.,Sommer, H.,"The Alma Software Architecture" Proc. SPIE 5496, 190-204 (2004). NO © SPIE-Int Soc Optical Engineering 2014.We gratefully acknowledge support from the agencies and organizations listed under Funding Agencies at this website:http://www.cta-observatory.org/.We gratefully acknowledge financial support from the following agencies and organizations: Ministerio de Ciencia, Tecnología e Innovación Productiva (MinCyT), Comisión Nacional de Energía Atómica (CNEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; State Committee of Science of Armenia, Armenia; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Brasil; Croatian Science Foundation, Croatia; Ministry of Education, Youth and Sports, MEYS LE13012, 7AMB12AR013, Czech Republic; Ministry of Higher Education and Research, CNRS-INSU and CNRS-IN2P3, CEA-Irfu, ANR, Regional Council Ile de France, Labex ENIGMASS, OSUG2020 and OCEVU, France; Max Planck Society, BMBF, DESY, Helmholtz Association, Germany; Department of Atomic Energy, Department of Science and Technology, India; Istituto Nazionale di Astrofisica (INAF), MIUR, Italy; ICRR, University of Tokyo, JSPS, Japan; Netherlands Research School for Astronomy (NOVA), Netherlands Organization for Scientific Research (NWO), Netherlands; The Bergen Research Foundation, Norway; Ministry of Science and Higher Education, the National Centre for Research and Development and the National Science Centre, Poland; MINECO support through the National R+D+I, CDTI funding plans and the CPAN and MultiDark Consolider-Ingenio 2010 programme, Spain; Swedish Research Council, Royal Swedish Academy of Sciences, Sweden; Swiss National Science Foundation (SNSF), Ernest Boninchi Foundation, Switzerland; Durham University, Leverhulme Trust, Liverpool University, University of Leicester, University of Oxford, Royal Society, Science and Technologies Facilities Council, UK; U.S. National Science Foundation, U.S. Department of Energy, Argonne National Laboratory, Barnard College, University of California, University of Chicago, Columbia University, Georgia Institute of Technology, Institute for Nuclear and Particle Astrophysics (INPAC-MRPI program), Iowa State University, Washington University McDonnell Center for the Space Sciences, USA.We have received funding from the European Union’s Seventh Framework Programme ([FP7/2007-2013] [FP7/2007-2011]) under Grant Agreement 262053.Conference on Ground-Based and Airborne Telescopes (5. 2014. Montreal, Canada) NO Croatian Science Foundation NO Ministry of Education, Youth and Sports NO Ministry of Higher Education and Research NO CNRS-INSU NO CNRS-IN2P3 NO CEA-Irfu NO ANR, France NO Regional Council Ile de France NO Labex ENIGMASS, France NO Labex OSUG2020, France NO Labex OCEVU, France NO Max Planck Society, Germany NO BMBF, Germany NO DESY, Germany NO Helmholtz Association, Germany NO Istituto Nazionale di Astrofisica (INAF), Italy NO MIUR, Italy NO Netherlands Research School for Astronomy (NOVA) NO Netherlands Organization for Scientific Research (NWO) NO Ministry of Science and Higher Education, Poland NO National Centre for Research and Development, Poland NO National Science Centre, Poland NO MINECO, Spain NO CDTI, Spain NO CPAN, Spain NO MultiDark Consolider-Ingenio 2010 programme, Spain NO Swedish Research Council NO Royal Swedish Academy of Sciences NO Durham University NO Leverhulme Trust NO Liverpool University NO University of Leicester NO University of Oxford NO Royal Society NO Science and Technologies Facilities Council NO European Union’s Seventh Framework Programme DS Docta Complutense RD 7 may 2024