Chen et al UFFO望远镜系列文章

主要内容:
UFFO (Ultra Fast Flash Observatory)是俄罗斯的望远镜，放在Lomonosov卫星上，2011年11月上天。主要包含两个仪器：UBAT发现暴的，SMT观测UV和光学余辉的。主要目的就是观测早期的光学余辉，因为SMT只要一秒钟就转过去了。

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Title:		The UFFO (Ultra Fast Flash Observatory) Pathfinder: Science and Mission
Authors:		Chen, P.; Ahmad, S.; Ahn, K.; Barrillon, P.; Blin-Bondil, S.; Brandt, S.; Budtz-Jorgensen, C.; Castro-Tirado, A. J.; Choi, H. S.; Choi, Y. J.; Connell, P.; Dagoret-Campagne, S.; De La Taille, C.;Eyles, C.; Grossan, B.; Hermann, I.; Huang, M. -H. A.; Jeong, S.; Jung, A.; Kim, J. E.; Kim, S. H.;Kim, Y. W.; Lee, J.; Lim, H.; Linder, E. V.; Liu, T. -C.; Lund, Niels; Min, K. W.; Na, G. W.;Nam, J. W.; Nam, K.; Panayuk, M. I.; Park, I. H.; Re-Glero, V.; Rodrigo, J. M.; Smoot, G. F.;Suh, Y. D.; Svelitov, S.; Vedenken, N.; Wang, M. -Z; Yashin, I.; Zhao, M. H.
Publication:		eprint arXiv:1106.3929
Publication Date:		06/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Comment:		4 pages, 5 figures, to appear in the 32nd International Conference on Cosmic Rays (ICRC), Beijing, August 11-18, 2011
Bibliographic Code:		2011arXiv1106.3929C

Abstract

Hundreds of gamma-ray burst (GRB) optical light curves have been measured since the discovery of optical afterglows. However, even after nearly 7 years of operation of the Swift Observatory, only a handful of measurements have been made soon (within a minute) after the gamma ray signal. This lack of early observations fails to address burst physics at short time scales associated with prompt emissions and progenitors. Because of this lack of sub-minute data, the characteristics of the rise phase of optical light curve of short-hard type GRB and rapid-rising GRB, which may account for ~30% of all GRB, remain practically unknown. We have developed methods for reaching sub-minute and sub-second timescales in a small spacecraft observatory. Rather than slewing the entire spacecraft to aim the optical instrument at the GRB position, we use rapidly moving mirror to redirect our optical beam. As a first step, we employ motorized slewing mirror telescope (SMT), which can point to the event within 1s, in the UFFO Pathfinder GRB Telescope onboard the Lomonosov satellite to be launched in Nov. 2011. UFFO's sub-minute measurements of the optical emission of dozens of GRB each year will result in a more rigorous test of current internal shock models, probe the extremes of bulk Lorentz factors, provide the first early and detailed measurements of fast-rise GRB optical light curves, and help verify the prospect of GRB as a new standard candle. We will describe the science and the mission of the current UFFO Pathfinder project, and our plan of a full-scale UFFO-100 as the next step.

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Bibtex entry for this abstract   Preferred format for this abstract (see Preferences) · Find Similar Abstracts (with default settings below) · arXiv e-print (arXiv:1106.3850) · References in the Article · Also-Read Articles (Reads History) · · Translate This Page Title: Optical Performances of Slewing Mirror Telescope for UFFO-Pathfinder Authors: Jeong, S.; Ahn, K. -B.; Nam, J. W.; Park, I. H.; Kim, S. -W.; Choi, H. S.; Grossan, B.; Hermann, I.;Jung, A.; Kim, Y. W.; Kim, J. E.; Linder, E. V.; Lee, J.; Lim, H.; Min, K. W.; Na, G. W.; Nam, K. H.;Panasyuk, M. I.; Smoot, G. F.; Svertilov, S.; Suh, Y. D.; Vedenkin, N.; Yashin, I.; Zhao, M. H.;For the UFFO collaboration Publication: eprint arXiv:1106.3850 Publication Date: 06/2011 Origin: ARXIV Keywords: Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics Comment: 4 pages, 6 figures, proceeding paper for the 32nd International Conference on Cosmic Rays (ICRC), Beijing, August 11-18, 2011 Bibliographic Code: 2011arXiv1106.3850J Abstract The Ultra-Fast Flash Observatory-Pathfinder (UFFO-P) is to be launched onboard Lomonosov spacecraft in November 2011. It is to measure early UV/Optical photons from Gamma Ray Bursts (GRBs). Slewing Mirror Telescope (SMT) is one of two instruments designed for detection of UV/Optical images of the GRBs. SMT is a Ritchey-Chr\'etien telescope of 100 mm in diameter with a motorized slewing mirror at the entrance providing 17\times17 arcmin2 in Field of View (FOV) and 4 arcsec in pixel resolution. Its sky coverage can be further expanded up to 35 degrees in FOV by tilting a motorized slewing mirror. All mirrors were fabricated to about RMS 0.02 waves in wave front error (WFE) and 84.7% (in average reflectivity) over 200nm~650nm range. SMT was aligned to RMS 0.05 waves in WFE (test wavelength 632.8nm). From the static gravity test result, SMT optics system is expected to survive during launch. The technical details of SMT assembly and laboratory performance test results are reported. Bibtex entry for this abstract   Preferred format for this abstract (see Preferences) · Find Similar Abstracts (with default settings below) · arXiv e-print (arXiv:1106.3804) · Also-Read Articles (Reads History) · · Translate This Page Title: Data Acquisition System for the UFFO Pathfinder Authors: Na, G. W.; Ahn, K. -B.; Choi, H. S.; Choi, Y. J.; Grossan, B.; Hermann, I.; Jeong, S.; Jung, A.;Kim, J. E.; Kim, S. -W.; Kim, Y. W.; Lee, J.; Lim, H.; Linder, E. V.; Min, K. W.; Nam, J. W.;Nam, K. H.; Panasyuk, M. I.; Park, I. H.; Smoot, G. F.; Suh, Y. D.; Svertilov, S.; Vedenkin, N.;Yashin, I.; Zhao, M. H.; For The Uffo Collaboration Publication: eprint arXiv:1106.3804 Publication Date: 06/2011 Origin: ARXIV Keywords: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Extragalactic Astrophysics, Physics - Instrumentation and Detectors Comment: 4 pages, 7 figures, 2 tables, proceeding paper for the 32nd International Conference on Cosmic Rays (ICRC), Beijing, August 11-18, 2011 Bibliographic Code: 2011arXiv1106.3804N Abstract The Ultra-Fast Flash Observatory (UFFO) Pathfinder is a payload on the Russian Lomonosov satellite, scheduled to be launched in November 2011. The Observatory is designed to detect early UV/Optical photons from Gamma-Ray Bursts (GRBs). There are two telescopes and one main data acquisition system: the UFFO Burst Alert & Trigger Telescope (UBAT), the Slewing Mirror Telescope (SMT), and the UFFO Data Acquisition (UDAQ) system. The UDAQ controls and manages the operation and communication of each telescope, and is also in charge of the interface with the satellite. It will write the data taken by each telescope to the NOR flash memory and sends them to the satellite via the Bus-Interface system (BI). It also receives data from the satellite including the coordinates and time of an external trigger from another payload, and distributes them to two telescopes. These functions are implemented in field programmable gates arrays (FPGA) for low power consumption and fast processing without a microprocessor. The UDAQ architecture, control of the system, and data flow will be presented. Bibtex entry for this abstract   Preferred format for this abstract (see Preferences) · Find Similar Abstracts (with default settings below) · arXiv e-print (arXiv:1106.3803) · Also-Read Articles (Reads History) · · Translate This Page Title: Implementation of the readout system in the UFFO Slewing Mirror Telescope Authors: Kim, J. E.; Lim, H.; Jung, A.; Ahn, K. -B; Choi, H. S.; Choi, Y. J.; Grossan, B.; Hermann, I.;Jeong, S.; Kim, S. -W.; Kim, Y. W.; Lee, J.; Linder, E. V.; Min, K. W.; Na, G. W.; Nam, J. W.;Nam, K. H.; Panayuk, M. I.; Park, I. H.; Smoot, G. F.; Suh, Y. D.; Svelitov, S.; Vedenken, N.;Yashin, I.; Zhao, M. H.; For The Uffo Collaboration Publication: eprint arXiv:1106.3803 Publication Date: 06/2011 Origin: ARXIV Keywords: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Extragalactic Astrophysics, Physics - Instrumentation and Detectors Bibliographic Code: 2011arXiv1106.3803K Abstract The Ultra-Fast Flash Observatory (UFFO) is a new space-based experiment to observe Gamma-Ray Bursts (GRBs). GRBs are the most luminous electromagnetic events in the universe and occur randomly in any direction. Therefore the UFFO consists of two telescopes; UFFO Burst Alert & Trigger Telescope (UBAT) to detect GRBs using a wide field-of-view (FOV), and a Slewing Mirror Telescope (SMT) to observe UV/optical events rapidly within the narrow, targeted FOV. The SMT is a Ritchey-Chretien telescope that uses a motorized mirror system and an Intensified Charge-Coupled Device (ICCD). When the GRB is triggered by the UBAT, the SMT receives the position information and rapidly tilts the mirror to the target. The ICCD start to take the data within a second after GRB is triggered. Here we give the details about the SMT readout electronics that deliver the data. Bibtex entry for this abstract   Preferred format for this abstract (see Preferences) · Find Similar Abstracts (with default settings below) · arXiv e-print (arXiv:1106.3802) · References in the Article · Also-Read Articles (Reads History) · · Translate This Page Title: Design and Fabrication of Detector Module for UFFO Burst Alert & Trigger Telescope Authors: Jung, A.; Ahmad, S.; Ahn, K. -B.; Barrillon, P.; Blin-Bondil, S.; Brandt, S.; Budtz-JØRgensen, C.;CaStro-Tirado, A. J.; Chen, P.; Choi, H. S.; Choi, Y. J.; Connell, P.; Dagoret-Campagne, S.;De La Taille, C.; Eyles, C.; Grossan, B.; Hermann, I.; Huang, M. -H. A.; Jeong, S.; Kim, J. E.;Kim, S. -W.; Kim, Y. W.; Lee, J.; Lim, H.; Linder, E. V.; Liu, T. -C.; Lund, N.; Min, K. W.; Na, G. W.;Nam, J. W.; Nam, K. H.; Panasyuk, M. I.; Park, I. H.; Reglero, V.; Rodrigo, J. M.; Smoot, G. F.;Suh, Y. D.; Svertilov, S.; Vedenkin, N.; Wang, M. -Z; Yashin, I.; Zhao, M. H.;For The Uffo Collaboration Publication: eprint arXiv:1106.3802 Publication Date: 06/2011 Origin: ARXIV Keywords: Astrophysics - Cosmology and Extragalactic Astrophysics Comment: 4 pages, 7 figures, 3 tables, ICRC conference proceeding paper; Beijing, August 11-18, 2011 Bibliographic Code: 2011arXiv1106.3802J Abstract The Ultra-Fast Flash Observatory (UFFO) pathfinder is a space mission devoted to the measurement of Gamma-Ray Bursts (GRBs), especially their early light curves which will give crucial information on the progenitor stars and central engines of the GRBs. It consists of two instruments: the UFFO Burst Alert & Trigger telescope (UBAT) for the detection of GRB locations and the Slewing Mirror Telescope (SMT) for the UV/optical afterglow observations, upon triggering by UBAT. The UBAT employs a coded-mask {\gamma}/X-ray camera with a wide field of view (FOV), and is comprised of three parts: a coded mask, a hopper, and a detector module (DM). The UBAT DM consists of a LYSO scintillator crystal array, multi-anode photo multipliers, and analog and digital readout electronics. We present here the design and fabrication of the UBAT DM, as well as its preliminary test results. Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)