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Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：24/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Simultaneous optical g, r, i monitoring and IDV periodic analysis for quasar 3C 454.3 期刊论文 OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2019, 卷号: 19, 期号: 10
作者: Fan JunHui; Yuan YuHai; Wu Hong; Wang Feng; Tao Jun

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收藏 | 浏览/下载：19/0 | 提交时间：2021/12/06

SPECTRAL SLOPE VARIABILITY BL-LACERTAE OBJECTS INTRADAY VARIABILITY INFRARED OBSERVATIONS BLAZAR 3C-454.3 COMPLETE SAMPLE BLACK-HOLES X-RAY RADIO MICROVARIABILITY galaxies: quasars: individual (3C 454.3)

收藏 | 浏览/下载：32/0 | 提交时间：2016/04/08

methods: statistical cosmology: observations large-scale structure of Universe infrared: galaxies

COSMOLOGICAL CONSTRAINT AND ANALYSIS ON HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 2012, 卷号: 27, 期号: 22, 页码: 1250130
作者: Wu, YL

收藏 | 浏览/下载：24/0 | 提交时间：2014/04/25

KAROLYHAZY UNCERTAINTY RELATION PROBE WMAP OBSERVATIONS EQUATION-OF-STATE SPACE-TIME INFRARED CUTOFF CONSTANT UNIVERSE SUPERNOVAE TRANSITION INFLATION

FOUR IRAC SOURCES WITH AN EXTREMELY RED H - [3.6] COLOR: PASSIVE OR DUSTY GALAXIES AT z > 4.5? 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL LETTERS, 2011, 卷号: 742, 期号: 1, 页码: L13(5)
作者: Huang, J. -S.; Zheng, X. Z.

收藏 | 浏览/下载：56/0 | 提交时间：2012/08/07

cosmology: observations galaxies: evolution galaxies: formation galaxies: high-redshift infrared: galaxies

MULTIWAVELENGTH MONITORING OF THE ENIGMATIC NARROW-LINE SEYFERT 1 PMN J0948+0022 IN 2009 MARCH-JULY 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL, 2009, 卷号: 707, 期号: 1, 页码: 727-737
作者: Abdo, A. A.

收藏 | 浏览/下载：76/0 | 提交时间：2015/08/18

galaxies: active gamma rays: observations infrared: galaxies quasars: individual (PMN J0948+0022) radio continuum: galaxies ultraviolet: galaxies X-rays: galaxies

Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy 期刊论文 OAI收割
PHYSICAL REVIEW D, 2009, 卷号: 79, 期号: 10, 页码: -
作者: Zhang, Xin; Zhang, X , Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China

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收藏 | 浏览/下载：33/0 | 提交时间：2012/08/02

Equation-of-state Anisotropy-probe Observations Cosmological Constant Statefinder Diagnosis Accelerating Universe Coupled Quintessence Cosmic Coincidence Wmap Observations Infrared Cutoff Model

A Review of Current Methodologies for Regional Evapotranspiration Estimation from Remotely Sensed Data SCI/SSCI论文 OAI收割
2009
Li Z. L.; Tang R. L.; Wan Z. M.; Bi Y. Y.; Zhou C. H.; Tang B. H.; Yan G. J.; Zhang X. Y.

收藏 | 浏览/下载：35/0 | 提交时间：2012/06/08

remote sensing evapotranspiration methodology review temporal scaling surface-energy balance large-aperture scintillometer southern great-plains thermal infrared data latent-heat flux 4-dimensional variational assimilation radiometric temperature observations hydrologic data assimilation atmospheric boundary-layer ensemble kalman filter

Discovery of the radio and X-ray counterpart of TeV gamma-ray source HESS J1731-347 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL LETTERS, 2008, 卷号: 679, 期号: 2, 页码: L85-L88
作者: Tian, W. W.; Leahy, D. A.; Haverkorn, M.; Jiang, B.

收藏 | 浏览/下载：19/0 | 提交时间：2017/04/05

gamma rays : observations infrared : galaxies radio continuum : galaxies radio lines : galaxies supernova remnants X-rays : galaxies

Determining the dust extinction of gamma-ray burst host galaxies: A direct method based on optical and X-ray photometry 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL , 2008, 卷号: 678, 期号: 2, 页码: 1136-1141
Li Y.; Li Aigen; Wei D. M.

收藏 | 浏览/下载：20/0 | 提交时间：2011/12/30

COSMIC CHEMICAL EVOLUTION XMM-NEWTON OBSERVATIONS SMALL-MAGELLANIC-CLOUD INFRARED-EMISSION INTERSTELLAR DUST EARLY AFTERGLOW LIGHT CURVES MILKY-WAY SWIFT ABSORPTION