18 results on '"Sidik Isani"'
Search Results
2. MegaCam FAST: reducing data acquisition time on the Canada-France-Hawaii Telescope’s wide-field optical imager
- Author
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Kevin Ho, Andreea Petric, Sidik Isani, Simon Prunet, and Tom Benedict
- Subjects
Telescope ,Data acquisition ,Computer science ,law ,Wide field ,Remote sensing ,law.invention - Abstract
MegaCam is Canada-France-Hawaii Telescope’s (CFHT) one-degree wide-field optical imager with an array of 40 CCDs that has been in operation since 2003 and remains the most demanded instrument at CFHT with an oversubscription of 2.5 each semester. Large programs requiring hundreds of nights dominate the available observing time leaving little for PI programs. To accommodate the demand and to improve overall observing efficiency, we launched the MegaCam FAST project to reduce the data acquisition time.
- Published
- 2018
3. Observatory software for the Maunakea Spectroscopic Explorer
- Author
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Kei Szeto, Kanoa Withington, Kevin Ho, Tom Vermeulen, Sidik Isani, and Rick Murowinski
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Physics ,business.industry ,Control software ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,law.invention ,010309 optics ,Telescope ,Software ,Conceptual design ,Observatory ,law ,0103 physical sciences ,Systems engineering ,Astronomical telescopes ,Architecture ,Spectral resolution ,0210 nano-technology ,business ,Remote sensing - Abstract
The Canada-France-Hawaii Telescope is currently in the conceptual design phase to redevelop its facility into the new Maunakea Spectroscopic Explorer (MSE). MSE is designed to be the largest non-ELT optical/NIR astronomical telescope, and will be a fully dedicated facility for multi-object spectroscopy over a broad range of spectral resolutions. This paper outlines the software and control architecture envisioned for the new facility. The architecture will be designed around much of the existing software infrastructure currently used at CFHT as well as the latest proven opensource software. CFHT plans to minimize risk and development time by leveraging existing technology.
- Published
- 2016
4. Conceptual design of the MOBIE imaging spectrograph for TMT
- Author
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Sidik Isani, Bruce C. Bigelow, Shinobu Ozaki, Hubert Yamada, Matthew V. Radovan, Rebecca Bernstein, Satoshi Miyazaki, and Peter M. Onaka
- Subjects
Physics ,Instrument control ,business.industry ,Detector ,Collimator ,Field of view ,Dichroic glass ,law.invention ,Optics ,law ,Broadband ,business ,Spectrograph ,Thirty Meter Telescope ,Remote sensing - Abstract
The Multi-Object Broadband Imaging Echellette (MOBIE) is the seeing-limited, visible-wavelength imaging multiobject spectrograph (MOS) planned for first-light use on the Thirty Meter Telescope (TMT). The MOBIE project to date has been a collaboration lead by UC Observatories (CA), and including the UH Institute for Astronomy (HI), and the NAOJ (Tokyo, Japan). The current MOBIE optical design provides two color channels, spanning the 310–550nm and 550-1000nm passbands, and a combination of reflection gratings, prisms, and mirrors to enable direct imaging and three spectroscopic modes with resolutions (λ/triangle λ) of roughly 1000, 3000, and 8000 in both color channels, across a field of view that ranges from roughly 8x3 arcmin to 3x3 arcmin, depending on resolution mode. The conceptual design phase for the MOBIE instrument has been underway since 2008 and is expected to end in 2015. We report here on developments since 2010, including assembly of the current project team, instrument and camera optical designs, instrument control systems, atmospheric dispersion corrector, slit-mask exchange systems, collimator, dichroic and fold optics, dispersing and cross-dispersing optics, refracting cameras, shutters, filter exchange systems, science detector systems, and instrument structures.
- Published
- 2014
5. GPC1 and GPC2: the Pan-STARRS 1.4 gigapixel mosaic focal plane CCD cameras with an on-sky on-CCD tip-tilt image compensation
- Author
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Sidik Isani, Gregory K. Ching, A. Lee, L. Robertson, R. Uyeshiro, C. Rae, Peter M. Onaka, and John L. Tonry
- Subjects
Cardinal point ,Pixel ,Computer science ,business.industry ,Controller (computing) ,Computer vision ,Field of view ,Point (geometry) ,Artificial intelligence ,business ,Tilt (camera) ,Compensation (engineering) - Abstract
We will report on the on-sky, on-CCD, tip-tilt image compensation performance of GPC1, the 1.4 gigapixel mosaic focal plane CCD camera for wide field surveys with a 7 square degree field of view. The camera uses 60 Orthogonal Transfer Arrays (OTAs) with a novel 4 phase pixel architecture and the STARGRASP controller for closed loop multi-guide star centroiding and image correction. The Pan-STARRS project is also constructing GPC2, the second 1.4 gigapixel camera using 64 OTAs. GPC2 will include design enhancements over GPC1 including a new generation of OTAs, titanium mosaic focal plane with adjustable three point kinematic mounts, cyro flex wiring and the recent software distributed over 32 controllers. We will discuss the design, cost, schedule, tools developed, shortcomings and future plans for the two largest digital cameras in the world.
- Published
- 2012
6. Results from the Pan-STARRS Orthogonal Transfer Array (OTA)
- Author
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Sidik Isani, Peter M. Onaka, Barry E. Burke, Michael Cooper, and John L. Tonry
- Subjects
Pixel ,Computer science ,business.industry ,Transfer (computing) ,Amplifier ,Hardware_INTEGRATEDCIRCUITS ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Visible radiation ,business ,Particle detector ,Computer hardware ,Compensation (engineering) ,Remote sensing - Abstract
The Pan-STARRS project has completed its first 1.4 gigapixel mosaic focalplane CCD camera using 60 Orthogonal Transfer Arrays (OTAs). The devices are the second of a series of planned development lots. Several novel properties were implemented into their design including 4 phase pixels for on-detector tip-tilt image compensation, selectable region logic for standby or active operation, relatively high output amplifier count, close four side buttable packaging and deep depletion construction. The testing and operational challenges of deploying these OTAs required enhancements and new approaches to hardware and software. We compare performance achieved with that which was predicted, and discuss on-sky results, tools developed, shortcomings, and plans for future OTA features and improvements.
- Published
- 2008
7. The Pan-STARRS Gigapixel Camera #1 and STARGRASP controller results and performance
- Author
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L. Robertson, R. Uyeshiro, Gregory K. Ching, Sidik Isani, C. Rae, John L. Tonry, A. Lee, and Peter M. Onaka
- Subjects
Cardinal point ,business.industry ,Computer science ,Transfer (computing) ,Controller (computing) ,business ,Computer hardware ,Compensation (engineering) - Abstract
The Pan-STARRS project has completed its first 1.4 gigapixel mosaic focal plane CCD camera, Gigapixel Camera #1 (GPC1). The mosaic focal plane of 60 densely packed 4k×4k MITLL CCD Orthogonal Transfer Arrays (OTAs) constitutes the World's largest CCD camera. The camera represents an extremely cost and time efficient effort with a less than 18 month production and integration phase and an approximate cost of $4 million USD (excluding NRE). The controller electronics named STARGRASP was developed to handle the 480 outputs at near 1Mpixel/sec rates with Gigabit Ethernet interfaces and can be scaled to even larger focal planes. Sophisticated functionality was developed for guide readout and on-detector tip-tilt image compensation with selectable region logic for standby or active operation, high output count, close four side buttable packaging and deep depletion construction. We will discuss the performance achieved, on-sky results, design, tools developed, shortcomings and future plans.
- Published
- 2008
8. IOTA: the array controller for a gigapixel OTCCD camera for Pan-STARRS
- Author
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A. Lee, Charles Lockhart, Gregory K. Ching, Sidik Isani, Gerard Anthony Luppino, Robin Uyeshiro, Peter M. Onaka, and John L. Tonry
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Telescope ,Sampling (signal processing) ,Computer science ,law ,business.industry ,Controller (computing) ,Ball grid array ,Field-programmable gate array ,business ,Computer hardware ,Small form factor ,Block (data storage) ,law.invention - Abstract
The PanSTARRS project has undertaken an ambitious effort to develop a completely new array controller architecture that is fundamentally driven by the large 1gigapixel, low noise, high speed OTCCD mosaic requirements as well as the size, power and weight restrictions of the PanSTARRS telescope. The result is a very small form factor next generation controller scalar building block with 1 Gigabit Ethernet interfaces that will be assembled into a system that will readout 512 outputs at ~1 Megapixel sample rates on each output. The paper will also discuss critical technology and fabrication techniques such as greater than 1MHz analog to digital converters (ADCs), multiple fast sampling and digital calculation of multiple correlated samples (DMCS), ball grid array (BGA) packaged circuits, LINUX running on embedded field programmable gate arrays (FPGAs) with hard core microprocessors for the prototype currently being developed.
- Published
- 2004
9. CFHT’s Skyprobe: True Atmospheric Attenuation Measurement in the Telescope Field
- Author
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Wiley Knight, Dan Sabin, Eugene A. Magnier, Sidik Isani, Kamson Lai, Simon Kras, and Jean-Charles Cuillandre
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Pixel ,Attenuation ,media_common.quotation_subject ,Detector ,Astronomy ,law.invention ,Photometry (optics) ,Primary mirror ,Telescope ,Geography ,law ,Sky ,Remote sensing ,media_common - Abstract
Developed at the Canada France Hawaii Telescope (CFHT), SkyProbe is a system that allows the direct measurement of the true attenuation by clouds. This measurement is performed approximately once per min, directly on the field viewed by the telescope. It has been possible to make this system relatively inexpensively due to low cost CCD cameras available on the amateur market. A crucial addition to this hardware is the recent availability of a full-sky photometry catalog at the appropriate depth: the Tycho catalog from the Hipparcos mission. A very important element in the SkyProbe data set creation is the automatic data analysis pipeline, Elixir, developed at CFHT for the improved operation of the CFHT wide-field imagers CFH12K and MegaCam. SkyProbe’s FITS images are processed in real time, and the pipeline output (a zero point attenuation) provides the current sky transmission to the observers and aids immediate decision making. These measurements are also attached to the archived data, adding a key tool for future use by other astronomers. Specific features of the detector, such as intra pixel quantum efficiency variations, must be taken into consideration since the data are strongly undersampled.
- Published
- 2004
10. CFHT’s Flyeyes: Assessing On-sky Performance of the New MIT/LL CCID-35 CCD Curvature Wavefront Sensor
- Author
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Jean-Charles Cuillandre, James Beletic, Reinhold Dorn, Gerard Luppino, Sidik Isani, Nicolas Gorceix, Olivier Lai, Thomas Craven-Bartle, Barry Burke, and François Mènard
- Subjects
Wavefront ,Time delay and integration ,Physics ,APDS ,Dynamic range ,business.industry ,Detector ,Wavefront sensor ,Avalanche photodiode ,law.invention ,Optics ,law ,Adaptive optics ,business - Abstract
Due to strict requirements of a very short integration time and very low readout noise, Avalanche Photodiodes (APDs) are the only detectors that have been used for curvature wavefront sensors in astronomy thus far. In 1999, Beletic et al. [1] presented a new CCD design that achieves the same performance as APDs, but with higher reliability and lower cost. In addition, this CCD has a higher quantum efficiency than APD modules and a larger dynamic range, eliminating the need for neutral density filters when viewing bright objects. In close collaboration with ESO and IfA, MIT Lincoln Laboratory designed and fabricated the device, the CCID-35. R. Dorn [2] tested the CCD in the laboratory at ESO extensively and proved that it achieves the predicted performance. CFHT is currently implementing this CCD on the PUEO Adaptive Optics system, to assess its performance on the sky for the first time, and for a direct comparison with the current 19 APD detector system. In this overview we present the current implementation scheme and discuss the upgrade we foresee for PUEO NUI, a 104 element high-order curvature AO system envisaged to replace the current AO system at CFHT [3,4].
- Published
- 2004
11. FlyEyes: a dual CCD detector system for CFHT PUEO NUI's wavefront sensor
- Author
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Gerard Anthony Luppino, Reinhold J. Dorn, James W. Beletic, Olivier Lai, Sidik Isani, Thomas V. Craven-Bartle, Nicolas Gorceix, Barry E. Burke, Francois Menard, and Jean-Charles Cuillandre
- Subjects
Wavefront ,Physics ,Time delay and integration ,APDS ,business.industry ,Detector ,Wavefront sensor ,Avalanche photodiode ,law.invention ,Telescope ,Optics ,law ,Adaptive optics ,business - Abstract
Until now, only avalanche photodiodes (APD) have been used as the detectors in curvature wavefront sensors in astronomy. This is due to the strict requirements of very short integration time and very low readout noise. In 1999, Beletic et al. invented a new CCD design which should achieve the same performance as APDs but with higher reliability and lower cost. In addition, this CCD has higher quantum efficiency than APD modules and larger dynamic range, eliminating the need for neutral density filters on bright objects. The CCD was designed and fabricated by MIT Lincoln Laboratory in collaboration with ESO and IfA. R. Dorn extensively tested the CCD in laboratory at ESO and proved that it achieves the predicted performance. CFHT is currently implementing this CCD on PUEO, CFHT’s Adaptive Optics system, to assess its performance for the first time in real conditions on the sky for a direct comparison with the current 19 APD detector system. In this article we present the current implementation scheme and discuss the upgrade we foresee for PUEO NUI, a 104-element high-order curvature AO system envisaged to replace the current AO system at Canada-France-Hawaii Telescope.
- Published
- 2003
12. CFHT's SkyProbe: a real-time sky-transparency monitor
- Author
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Eugene A. Magnier, Daniel Sabin, Wiley Knight, Jean-Charles Cuillandre, Sidik Isani, Kamson Lai, and Simon Kras
- Subjects
Photometry (optics) ,Telescope ,Sky ,Computer science ,law ,Site testing ,media_common.quotation_subject ,Central element ,media_common ,Remote sensing ,law.invention - Abstract
We have developed a system at the Canada-France-Hawaii Telescope (CFHT), SkyProbe, which allows for the direct measurement of the true attenuation by clouds once per minute, within a percent, directly on the field pointed by the telescope. It has been possible to make this system relatively inexpensively due to the low-cost CCD cameras from the amateur market. A crucial addition to this hardware is the quite recent availability of a full-sky photometry catalog at the appropriate depth: the Tycho catalog, from the Hipparcos mission. The central element is the automatic data analysis pipeline developed at CFHT, Elixir, for the improved operation of the CFHT wide-field imagers, CFH12K and MegaCam. SkyProbe’s FITS images are processed in real-time and the pipeline output (a zero point attenuation) provides the current sky transmission to the observers and helps immediate decision making. These measurements are also attached to the archived data, adding a key criteria for future use by other astronomers.
- Published
- 2002
13. Performance of the CFH12K: a 12K by 8K CCD mosaic camera for the CFHT prime focus
- Author
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Gerard Anthony Luppino, Barry Michael Starr, Jean-Charles Cuillandre, and Sidik Isani
- Subjects
Physics ,Pixel ,business.industry ,Image quality ,Terabyte ,law.invention ,Telescope ,Software ,Filter (video) ,law ,Data quality ,Computer vision ,Artificial intelligence ,business ,Focus (optics) ,Remote sensing - Abstract
CFH12K is a 12,228 by 8,192 pixel wide-field imaging camera in operation at the 3.6m Canada-France-Hawaii Telescope (CFHT) since January 1999. It still remains the largest close-packed array in use in astronomy today. The mosaic consists of twelve MIT Lincoln laboratories 2K by 4K thinned backside illuminated CCID-20 devices. The camera is used in broad-band and narrow-band filter direct imaging mode which constrains the devices' operating parameters to ensure the best data quality. Adaptation to the 20-year old CFHT prime focus environment included modifications to reduce the scattered light seen by the camera. Computer facilities have been upgraded and new software has been developed to handle the large amount of data generated. The two terabytes of scientific data taken by the camera in 1999 has proven the success of CFHT's new capability for 42 by 28 square arcminute imaging with high resolution subarcsecond seeing.
- Published
- 2000
14. Design of the CFH12K: 12K x 8K CCD mosaic camera for the CFHT prime focus
- Author
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Jean-Charles Cuillandre, Sidik Isani, Barry Michael Starr, and Gerard Anthony Luppino
- Subjects
Physics ,Telescope ,Data acquisition ,Mauna kea ,Pixel ,law ,Mosaic (geodemography) ,Astronomical telescopes ,Focus (optics) ,Prime (order theory) ,law.invention ,Remote sensing - Abstract
The CFH12K is a 12K by 8K CCD mosaic camera for the Canada- France-Hawaii Telescope (CFHT), a 3.6 m telescope located on Mauna Kea, Hawaii. The CFH12K is comprised of twelve 4K by 2K thinned backside-illuminated CCDs, arrange din a close- packed array of two rows each containing six CCDs. Located at the CFHT Prime Focus, the CFH12K provides a 42 by 28 arcminute field-of-view, 0.206 arcsecond per pixel sampling, with a resulting data file of more than 200Mbytes per image. The camera has been designed to exploit the exceptional wide-field imaging capability provided by the CFHT. At the time of its commissioning in January 1999, the CFH12K is the largest thinned close-packed CCD mosaic in astronomy. This paper describes the system architecture, and some of the relevant issues associated with the construction, evaluation, and operation of very large mosaic cameras. Emphasis is given to system design issues, illustrating the CFHT12K as part of a larger system: the CFHT.
- Published
- 2000
15. CFH12k: 12k x 8k CCD mosaic camera for the CFHT prime focus
- Author
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Sidik Isani, Gerard Anthony Luppino, Jean-Charles Cuillandre, and Barry Michael Starr
- Subjects
Telescope ,Cardinal point ,Pixel ,Computer science ,law ,Astronomy ,Mosaic (geodemography) ,Focus (optics) ,Prime (order theory) ,Remote sensing ,law.invention - Abstract
The CFH12K is a 12K×8K CCD mosaic camera for the Canada-France-Hawaii Telescope (CFHT), a 3.6m telescope located on Mauna Kea, Hawaii. Positioned at the CFHT Prime Focus (f/4.2), the CFH12K provides a 42 by 28 arcminute field-of-view, 0.206 arcsecond per pixel sampling, with a resulting data file of more than 200 Mbytes per image. At the time of commissioning in January 1999, the CFH12K is the largest thinned close-packed CCD mosaic in astronomy. This paper describes the system architecture and some of the relevant issues associated with the construction, evaluation, and operation of very large mosaic cameras. Emphasis is given to system design issues, illustrating the CFH12K as part of a larger system: the CFHT.
- Published
- 2000
16. CFH12K: 12K×8K CCD Mosaic Camera for the CFHT Prime Focus
- Author
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Gerard Anthony Luppino, Sidik Isani, Jean-Charles Cuillandre, and Barry Michael Starr
- Subjects
Physics ,Focus (computing) ,Computer graphics (images) ,Mosaic (geodemography) ,Astrophysics ,Prime (order theory) - Published
- 2000
17. CFH12K: Optimising 12 MIT/LL CCID-20 CCDs for a direct imaging application
- Author
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Sidik Isani, Barry Michael Starr, Jean-Charles Cuillandre, and Gerard Anthony Luppino
- Subjects
Physics ,Narrow band ,Bright star ,Optics ,business.industry ,Filter (video) ,Wide field imaging ,Direct imaging ,Scattered light ,Focus (optics) ,business - Abstract
CFH12K is a 12Kx8K wide field imaging camera for the CFHT prime focus. The mosaic consists of twelve MIT Lincoln Laboratory 2Kx4k thinned backside illuminated CCID-20 devices. The devices’ operating parameters have been optimised to ensure the best data quality for use in broad and narrow band filter imaging mode. Adaptation to the CFHT prime focus environment included modifications to reduce the scattered light seen by the CFH12K. Science data taken by the camera has proven the success of CFHT’s new capability for 42×28 square arcminute imaging with high-resolution subarcsecond seeing.
- Published
- 2000
18. The Detailed Science Case for the Maunakea Spectroscopic Explorer: the Composition and Dynamics of the Faint Universe
- Author
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Alan Mcconnachie, Carine Babusiaux, Michael Balogh, Simon Driver, Pat Côté, Helene Courtois, Luke Davies, Laura Ferrarese, Sarah Gallagher, Rodrigo Ibata, Nicolas Martin, Aaron Robotham, Kim Venn, Eva Villaver, Jo Bovy, Alessandro Boselli, Matthew Colless, Johan Comparat, Kelly Denny, Pierre-Alain Duc, Sara Ellison, Richard de Grijs, Mirian Fernandez-Lorenzo, Ken Freeman, Raja Guhathakurta, Patrick Hall, Andrew Hopkins, Mike Hudson, Andrew Johnson, Nick Kaiser, Jun Koda, Iraklis Konstantopoulos, George Koshy, Khee-Gan Lee, Adi Nusser, Anna Pancoast, Eric Peng, Celine Peroux, Patrick Petitjean, Christophe Pichon, Bianca Poggianti, Carlo Schmid, Prajval Shastri, Yue Shen, Chris Willot, Scott Croom, Rosine Lallement, Carlo Schimd, Dan Smith, Matthew Walker, Jon Willis, Alessandro Bosselli Matthew Colless, Aruna Goswami, Matt Jarvis, Eric Jullo, Jean-Paul Kneib, Iraklis Konstantopoloulous, Jeff Newman, Johan Richard, Firoza Sutaria, Edwar Taylor, Ludovic van Waerbeke, Giuseppina Battaglia, Misha Haywood, Charli Sakari, Arnaud Seibert, Sivarani Thirupathi, Yuting Wang, Ferdinand Babas, Steve Bauman, Elisabetta Caffau, Mary Beth Laychak, David Crampton, Daniel Devost, Nicolas Flagey, Zhanwen Han, Clare Higgs, Vanessa Hill, Kevin Ho, Sidik Isani, Shan Mignot, Rick Murowinski, Gajendra Pandey, Derrick Salmon, Arnaud Siebert, Doug Simons, Else Starkenburg, Kei Szeto, Brent Tully, Tom Vermeulen, Kanoa Withington, Nobuo Arimoto, Martin Asplund, Hervé Aussel, Michele Bannister, Harish Bhatt, Ss Bhargavi, John Blakeslee, Joss Bland-Hawthorn, James Bullock, Denis Burgarella, Tzu-Ching Chang, Andrew Cole, Jeff Cooke, Andrew Cooper, Paola Di Matteo, Ginevra Favole, Hector Flores, Bryan Gaensler, Peter Garnavich, Karoline Gilbert, Rosa Gonzalez-Delgado, Puragra Guhathakurta, Guenther Hasinger, Falk Herwig, Narae Hwang, Pascale Jablonka, Umanath Kamath, Lisa Kewley, Damien Le Borgne, Geraint Lewis, Robert Lupton, Sarah Martell, Mario Mateo, Olga Mena, David Nataf, Enrique Pérez, Francisco Prada, Mathieu Puech, Alejandra Recio-Blanco, Annie Robin, Will Saunders, Stalin, C. S., Charling Tao, Karun Thanjuvur, Laurence Tresse, Jian-Min Wang, David Yong, Gongbo Zhao, Patrick Boisse, James Bolton, Piercarlo Bonifacio, François Bouchy, Len Cowie, Katia Cunha, Magali Deleuil, Ernst de Mooij, Patrick Dufour, Sebastien Foucaud, Karl Glazebrook, John Hutchings, Chiaki Kobayashi, Rolf-Peter Kudritzki, Yang-Shyang Li, Lihwai Lin, Yen-Ting Lin, Martin Makler, Norio Narita, Changbom Park, Ryan Ransom, Swara Ravindranath, Bacham Eswar Reddy, Marcin Sawicki, Luc Simard, Raghunathan Srianand, Thaisa Storchi-Bergmann, Keiichi Umetsu, Ting-Gui Wang, Jong-Hak Woo, and Xue-Bing Wu
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