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A bright optical flare was detected in the high-redshift ($z=2.133$) quasar CGRaBS J0809+5341 on 2014 April 13. The absolute magnitude of the object reached $-30.0$ during the flare, making it the brightest one (in flaring stage) among all…

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Low-level radiofrequency system upgrade for the Dalian Coherent Light Source

DCLS (Dalian Coherent Light Source) is an FEL (Free-Electron Laser) user facility at EUV (Extreme Ultraviolet). The primary accelerator of DCLS operates at a repetition rate of 20 Hz, and the beam is divided at the end of the linear…

Accelerator Physics · Physics 2023-11-17 H. L. Ding , J. F. Zhu , H. K. Li , J. W. Han , X. W. Dai , J. Y. Yang , W. Q. Zhang

Long term variability and correlation study of the blazar 3C 454.3 in radio, NIR and optical wavebands

We performed a long-term optical (B, V, R bands), infra-red (J and K bands) and radio band (15, 22, 37 GHz band) study on the flat spectrum radio quasar, 3C 454.3, using the data collected over a period of more than 8 years (MJD…

High Energy Astrophysical Phenomena · Physics 2020-01-08 A. Sarkar , V. R. Chitnis , A. C. Gupta , H. Gaur , S. R. Patel , P. J. Wiita , A. E. Volvach , M. Tornikoski , W. Chamani , S. Enestam , A. Lähteenmäki , J. Tammi , R. J. C Vera , L. N. Volvach

Operation and performance of the CMS silicon strip tracker with proton-proton collisions at the CERN LHC

Salient aspects of the commissioning, calibration, and performance of the CMS silicon strip tracker are discussed, drawing on experience during operation with proton-proton collisions delivered by the CERN LHC. The data were obtained with a…

Instrumentation and Detectors · Physics 2025-08-26 CMS Collaboration

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High Energy Astrophysical Phenomena · Physics 2015-05-18 Bingkai Zhang , Benzhong Dai , Li Zhang , Jiali Liu , Zhen Cao

Development of a new wideband heterodyne receiver system for the Osaka 1.85-m mm-submm telescope -- Receiver development & the first light of simultaneous observation in 230GHz and 345GHz bands with an SIS-mixer with 4-21GHz IF output

We have developed a wideband receiver system for simultaneous observations in CO lines of J = 2-1 and J = 3-2 transitions using the Osaka 1.85-m mm-submm telescope. As a frequency separation system, we developed multiplexers that connect…

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Measuring Baryon Acoustic Oscillations on 21 cm intensity fluctuations at moderate redshifts

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First observation of quantum correlations in $e^+e^-\to XD\bar{D}$ and $C$-even constrained $D\bar{D}$ pairs

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High Energy Physics - Experiment · Physics 2025-10-28 BESIII Collaboration , M. Ablikim , M. N. Achasov , P. Adlarson , X. C. Ai , R. Aliberti , A. Amoroso , Q. An , Y. Bai , O. Bakina , Y. Ban , H. -R. Bao , V. Batozskaya , K. Begzsuren , N. Berger , M. Berlowski , M. Bertani , D. Bettoni , F. Bianchi , E. Bianco , A. Bortone , I. Boyko , R. A. Briere , A. Brueggemann , H. Cai , M. H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , X. Y. Chai , J. F. Chang , G. R. Che , Y. Z. Che , C. H. Chen , Chao Chen , G. Chen , H. S. Chen , H. Y. Chen , M. L. Chen , S. J. Chen , S. L. Chen , S. M. Chen , T. Chen , X. R. Chen , X. T. Chen , X. Y. Chen , Y. B. Chen , Y. Q. Chen , Y. Q. Chen , Z. Chen , Z. J. Chen , Z. K. Chen , J. C. Cheng , S. K. Choi , X. Chu , G. Cibinetto , F. Cossio , J. Cottee-Meldrum , J. J. Cui , H. L. Dai , J. P. Dai , A. Dbeyssi , R. E. de Boer , D. Dedovich , C. Q. Deng , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , B. Ding , X. X. Ding , Y. Ding , Y. Ding , Y. X. Ding , J. Dong , L. Y. Dong , M. Y. Dong , X. Dong , M. C. Du , S. X. Du , S. X. Du , Y. Y. Duan , Z. H. Duan , P. Egorov , G. F. Fan , J. J. Fan , Y. H. Fan , J. Fang , J. Fang , S. S. Fang , W. X. Fang , Y. Q. Fang , R. Farinelli , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , J. H. Feng , L. Feng , Q. X. Feng , Y. T. Feng , M. Fritsch , C. D. Fu , J. L. Fu , Y. W. Fu , H. Gao , X. B. Gao , Y. Gao , Y. N. Gao , Y. N. Gao , Y. Y. Gao , S. Garbolino , I. Garzia , L. Ge , P. T. Ge , Z. W. Ge , C. Geng , E. M. Gersabeck , A. Gilman , K. Goetzen , J. D. Gong , L. Gong , W. X. Gong , W. Gradl , S. Gramigna , M. Greco , M. H. Gu , Y. T. Gu , C. Y. Guan , A. Q. Guo , L. B. Guo , M. J. Guo , R. P. Guo , Y. P. Guo , A. Guskov , J. Gutierrez , K. L. Han , T. T. Han , F. Hanisch , K. D. Hao , X. Q. Hao , F. A. Harris , K. K. He , K. L. He , F. H. Heinsius , C. H. Heinz , Y. K. Heng , C. Herold , P. C. Hong , G. Y. Hou , X. T. Hou , Y. R. Hou , Z. L. 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Li , R. Li , S. X. Li , T. Li , T. Y. Li , W. D. Li , W. G. Li , X. Li , X. H. Li , X. L. Li , X. Y. Li , X. Z. Li , Y. Li , Y. G. Li , Y. P. Li , Z. J. Li , Z. Y. Li , C. Liang , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , L. B. Liao , M. H. Liao , Y. P. Liao , J. Libby , A. Limphirat , C. C. Lin , D. X. Lin , L. Q. Lin , T. Lin , B. J. Liu , B. X. Liu , C. Liu , C. X. Liu , F. Liu , F. H. Liu , Feng Liu , G. M. Liu , H. Liu , H. B. Liu , H. H. Liu , H. M. Liu , Huihui Liu , J. B. Liu , J. J. Liu , K. Liu , K. Liu , K. Y. Liu , Ke Liu , L. C. Liu , Lu Liu , M. H. Liu , M. H. Liu , P. L. Liu , Q. Liu , S. B. Liu , T. Liu , W. K. Liu , W. M. Liu , W. T. Liu , X. Liu , X. Liu , X. K. Liu , X. L. Liu , X. Y. Liu , Y. Liu , Y. Liu , Y. Liu , Y. B. Liu , Z. A. Liu , Z. D. Liu , Z. Q. Liu , X. C. Lou , F. X. Lu , H. J. Lu , J. G. Lu , X. L. Lu , Y. Lu , Y. H. Lu , Y. P. Lu , Z. H. Lu , C. L. Luo , J. R. Luo , J. S. Luo , M. X. Luo , T. Luo , X. L. Luo , Z. Y. Lv , X. R. Lyu , Y. F. 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Wang , N. Y. Wang , S. Wang , T. Wang , T. J. Wang , W. Wang , W. Wang , W. P. Wang , X. Wang , X. F. Wang , X. J. Wang , X. L. Wang , X. N. Wang , Y. Wang , Y. D. Wang , Y. F. Wang , Y. H. Wang , Y. J. Wang , Y. L. Wang , Y. N. Wang , Y. Q. Wang , Yaqian Wang , Yi Wang , Yuan Wang , Z. Wang , Z. L. Wang , Z. L. Wang , Z. Q. Wang , Z. Y. Wang , D. H. Wei , H. R. Wei , F. Weidner , S. P. Wen , Y. R. Wen , U. Wiedner , G. Wilkinson , M. Wolke , C. Wu , J. F. Wu , L. H. Wu , L. J. Wu , L. J. Wu , Lianjie Wu , S. G. Wu , S. M. Wu , X. Wu , X. H. Wu , Y. J. Wu , Z. Wu , L. Xia , X. M. Xian , B. H. Xiang , D. Xiao , G. Y. Xiao , H. Xiao , Y. L. Xiao , Z. J. Xiao , C. Xie , K. J. Xie , X. H. Xie , Y. Xie , Y. G. Xie , Y. H. Xie , Z. P. Xie , T. Y. Xing , C. F. Xu , C. J. Xu , G. F. Xu , H. Y. Xu , H. Y. Xu , M. Xu , Q. J. Xu , Q. N. Xu , T. D. Xu , W. Xu , W. L. Xu , X. P. Xu , Y. Xu , Y. Xu , Y. C. Xu , Z. S. Xu , F. Yan , H. Y. Yan , L. Yan , W. B. Yan , W. C. Yan , W. H. Yan , W. P. 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Hints of High Core Faraday Rotations from a Joint Analysis of VLBA and Optical Polarization Data

Although the continua of radio-loud Active Galactic Nuclei (AGN) are typically dominated by synchrotron radiation over virtually the entire spectrum, it is not clear whether the radio and higher-frequency emission originate in the same or…

Astrophysics of Galaxies · Physics 2009-02-06 J. C. Algaba , D. C. Gabuzda , P. S. Smith

Nearest Neighbour-Based Statistics for 21cm-Galaxy Cross-Correlations in the Epoch of Reionization

21cm radiation from neutral hydrogen serves as a direct probe of the Epoch of Reionization. However, both its detection and physical interpretation are severely hindered by contamination from astrophysical foreground emission and…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-07 Anirban Chakraborty , Kwanit Gangopadhyay , Arka Banerjee , Tirthankar Roy Choudhury

Fundamental Performance of a Dispersed Fixed Delay Interferometer In Searching For Planets Around M Dwarfs

We present a new method to calculate fundamental Doppler measurement limits with a dispersed fixed-delay interferometer (DFDI) in the near infrared wavelength region for searching for exoplanets around M dwarfs in the coming decade. It is…

Earth and Planetary Astrophysics · Physics 2015-05-28 Ji Wang , Jian Ge , Peng Jiang , Bo Zhao

The Holometer: An Instrument to Probe Planckian Quantum Geometry

This paper describes the Fermilab Holometer, an instrument for measuring correlations of position variations over a four-dimensional volume of space-time. The apparatus consists of two co-located, but independent and isolated, 40m…

Instrumentation and Detectors · Physics 2017-03-27 Aaron Chou , Henry Glass , H. Richard Gustafson , Craig Hogan , Brittany L. Kamai , Ohkyung Kwon , Robert Lanza , Lee McCuller , Stephan S. Meyer , Jonathan Richardson , Chris Stoughton , Ray Tomlin , Rainer Weiss

Predictions for BAO distance estimates from the cross-correlation of the Lyman-alpha forest and redshifted 21-cm emission

We investigate the possibility of using the cross-correlation of the Lyman-alpha forest and redshifted 21-cm emission to detect the baryon acoustic oscillation (BAO). The standard Fisher matrix formalism is used to determine the accuracy…

Cosmology and Nongalactic Astrophysics · Physics 2013-08-13 Tapomoy Guha Sarkar , Somnath Bharadwaj

Chandrayaan-2 Dual-Frequency SAR (DFSAR): Performance Characterization and Initial Results

The Dual-Frequency synthetic aperture radar (DFSAR) system manifested on the Chandrayaan-2 spacecraft represents a significant step forward in radar exploration of solid solar system objects. It combines SAR at two wavelengths (L- and…

Instrumentation and Methods for Astrophysics · Physics 2021-09-28 Sriram S. Bhiravarasu , Tathagata Chakraborty , Deepak Putrevu , Dharmendra K. Pandey , Anup K. Das , V. M. Ramanujam , Raghav Mehra , Parikshit Parasher , Krishna M. Agrawal , Shubham Gupta , Gaurav S. Seth , Amit Shukla , Nikhil Y. Pandya , Sanjay Trivedi , Arundhati Misra , Rajeev Jyoti , Raj Kumar

Observed Limits on Charge Exchange Contributions to the Diffuse X-ray Background

We present a high resolution spectrum of the diffuse X-ray background from 0.1 to 1 keV for a ~1 region of the sky centered at l=90, b=+60 using a 36-pixel array of microcalorimeters flown on a sounding rocket. With an energy resolution of…

High Energy Astrophysical Phenomena · Physics 2012-10-15 S. G. Crowder , K. A. Barger , D. E. Brandl , M. E. Eckart , M. Galeazzi , R. L. Kelley , C. A. Kilbourne , D. McCammon , C. G. Pfendner , F. S. Porter , L. Rocks , A. E. Szymkowiak , I. M. Teplin

Exploring Accretion and Disk-Jet Connections in the LLAGN M81*

We report on a year-long effort to monitor the central supermassive black hole in M81 in the X-ray and radio bands. Using Chandra and the VLA, we obtained quasi-simultaneous observations of M81* on seven occasions during 2006. The X-ray and…

High Energy Astrophysical Phenomena · Physics 2015-05-19 J. M. Miller , M. Nowak , S. Markoff , M. Rupen , D. Maitra

The soft X-ray properties of AGN from the CJF sample; A correlation analysis between soft X-ray and VLBI properties

Context: We present the soft X-ray properties obtained in the ROSAT All-Sky survey and from pointed PSPC observations for the AGN in the complete flux-density limited Caltech-Jodrell Bank flat spectrum sample (hereafter CJF). CJF is a VLBI…

Astrophysics · Physics 2009-11-13 S. Britzen , W. Brinkmann , R. M. Campbell , M. Gliozzi , A. C. S. Readhead , I. W. A. Browne , P. Wilkinson

Dark Photon Search at Yemilab, Korea

Dark photons are well motivated hypothetical dark sector particles that could account for observations that cannot be explained by the standard model of particle physics. A search for dark photons that are produced by an electron beam…

High Energy Physics - Phenomenology · Physics 2021-04-16 Seon-Hee Seo , Yeongduk Kim

An Update on the External Calibrator for Hydrogen Observatories (ECHO)

Precision measurements of the beam pattern response are needed to predict the response of a radio telescope. Mapping the beam of a low frequency radio array presents a unique challenge and science cases such as the observation of the 21\,cm…

Instrumentation and Methods for Astrophysics · Physics 2024-07-08 Yifan Zhao , Daniel C. Jacobs , Titu Samson , Mrudula Gopal Krishna , Michael Horn , Marc-Olivier R. Lalonde , Raven Braithwaite , Logan Skabelund

Dispersive Charge and Flux Qubit Readout as a Quantum Measurement Process

We analyze the dispersive readout of superconducting charge and flux qubits as a quantum measurement process. The measurement oscillator frequency is considered much lower than the qubit frequency. This regime is interesting because large…

Superconductivity · Physics 2015-06-25 L. Tornberg , G. Johansson