scholarly journals MULTI-WAVELENGTH STUDY OF FLARING ACTIVITY IN BL Lac OBJECT S5 0716+714 DURING THE 2015 OUTBURST

2015 ◽  
Vol 809 (2) ◽  
pp. 130 ◽  
Author(s):  
Sunil Chandra ◽  
Haocheng Zhang ◽  
Pankaj Kushwaha ◽  
K. P. Singh ◽  
M. Bottcher ◽  
...  
Keyword(s):  
Bl Lac ◽  
Multi Wavelength

Multi-wavelength search for quasi-periodic oscillations in BL Lac 4FGL J0112.1+2245

2022 ◽  
Vol 367 (1) ◽  
Author(s):  
Y. L. Gong ◽  
T. F. Yi ◽  
X. Yang ◽  
H. Z. Li ◽  
X. Chang ◽  
...  
Keyword(s):  
Periodic Oscillations ◽  
Bl Lac ◽  
Multi Wavelength

scholarly journals Multi-wavelength observations of the BL Lac object Fermi J1544-0649: One year after its awakening

2020 ◽  
Vol 26 ◽  
pp. 45-57
Author(s):  
P.H.T. Tam ◽  
P.S. Pal ◽  
Y.D. Cui ◽  
N. Jiang ◽  
Y. Sotnikova ◽  
...  
Keyword(s):  
Bl Lac ◽  
Multi Wavelength ◽  
One Year

scholarly journals VHE BL Lacs through the MAGIC glasses

2014 ◽  
Vol 10 (S313) ◽  
pp. 64-69
Author(s):  
Josefa Becerra González ◽  
Keyword(s):  
Optical Emission ◽  
Theoretical Models ◽  
High Energy ◽  
Bl Lac Objects ◽  
Individual Object ◽  
Bl Lac ◽  
Multi Wavelength ◽  
Very High Energy ◽  
First Time

AbstractIn this contribution an overview of the latest results on the study of BL Lac objects with the MAGIC telescopes at the very high energy (VHE, E>100 GeV) gamma-rays is presented. Three new VHE sources were detected during 2014, two BL Lac objects and the gravitational lensed blazar S3 0218+357. MAGIC detected very fast intra-night variability from IC 310. This detection points to smaller emitting regions than the event horizon, this is hard to be explained in the framework of the current theoretical models. The long term multi wavelength (MWL) study of the BL Lac PKS 1424+240 shows correlation between the radio and optical emission, pointing to a common origin. The MWL SED is not well fitted by a one-zone synchrotron-self Compton (SSC) model, but a two-zone SSC model can explain both, the MWL light curve and the SED. Spectral curvature has been found in the observed VHE spectrum from PG 1553+113. This is the first time that spectral curvature compatible with the EBL absorption is found in an individual object.

scholarly journals A multi-wavelength test of the FR I–BL Lac unifying model

2003 ◽  
Vol 403 (3) ◽  
pp. 889-899 ◽  
Author(s):  
E. Trussoni ◽  
A. Capetti ◽  
A. Celotti ◽  
M. Chiaberge ◽  
L. Feretti
Keyword(s):  
Bl Lac ◽  
Multi Wavelength

Observations for the Role of Flux rope Eruption in a Geoeffective Solar Flare

2014 ◽  
Vol 4 (2) ◽  
pp. 555-564
Author(s):  
A.M Aslam
Keyword(s):  
Solar Flare ◽  
Flux Rope ◽  
Magnetic Configuration ◽  
Solar Dynamics Observatory ◽  
Multi Wavelength ◽  
Solar Dynamics ◽  
Halo Coronal Mass Ejection ◽  
Mass Ejection ◽  
The Waves

On September 24, 2011 a solar flare of M 7.1 class was released from the Sun. The flare was observed by most of the space and ground based observatories in various wavebands. We have carried out a study of this flare to understand its causes on Sun and impact on earth. The flare was released from NOAA active region AR 11302 at 12:33 UT. Although the region had already produced many M class flares and one X- class flare before this flare, the magnetic configuration was not relaxed and still continued to evolve as seen from HMI observations. From the Solar Dynamics Observatory (SDO) multi-wavelength (131 Ã…, 171 Ã…, 304 Ã… and 1600Ã…) observations we identified that a rapidly rising flux rope triggered the flare although HMI observations revealed that magnetic configuration did not undergo a much pronounced change. The flare was associated with a halo Coronal Mass Ejection (CME) as recorded by LASCO/SOHO Observations. The flare associated CME was effective in causing an intense geomagnetic storm with minimum Dst index -103 nT. A radio burst of type II was also recorded by the WAVES/WIND. In the present study attempt is made to study the nature of coupling between solar transients and geospace.

Multi-wavelength imaging and its application as a plasma torch health monitor

1997 ◽  
Author(s):  
C. Winstead ◽  
W. Wang ◽  
R. Cook ◽  
G. Miller ◽  
C. Winstead ◽  
...  
Keyword(s):  
Plasma Torch ◽  
Multi Wavelength ◽  
Health Monitor

Choice of Optimum Operational Regime for Total Stations upon Making Geodetic Surveys under Heavy Aerosol Atmosphere Pollution

2018 ◽  
Vol 938 (8) ◽  
pp. 12-19
Author(s):  
S. B. Verdiyev
Keyword(s):  
Rational Choice ◽  
Theoretical Modelling ◽  
Total Station ◽  
Visible Band ◽  
Multi Wavelength ◽  
Atmosphere Pollution ◽  
Experimental Researches ◽  
Practical Recommendations

The possibility to use multi-wavelength regime of total stations operation for making surveys under heavy aerosol atmosphere pollution is researched. The actuality of single- and multi-wavelength regimes rational choice under heavy aerosol atmosphere pollution is grounded. The task on researching the matter of operational regime choice for total stations is formulated. The method for solution of the formulated task is suggested. The theoretical modelling and experimental researches are held to formulate the criterion for choice of single- or multi-wavelength regimes. The practical recommendations for such a choice are formulated. The practical recommendations are formulated for choice of measurements regime. According to formulated recommendations if a single-wavelength total station operates in the field of longer wavelengths (R) of visible band and a three-wavelengths one operates with bias to shorter (B, G, R) wavelengths, the single-wavelength total station should be preferred. But if the single-wavelength total station operates in the field of shorter wavelengths (B) and the three-wavelengths one operates with bias to longer wavelengths (B, G, R) then the multi-wavelengths total station should be preferred. The recommendation described in this article are relevant for both the regimes of measurements with- and without reflector and can be useful for users of total stations.

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