Sigma upper limits to the hard X-ray/soft gamma-ray emission from the millisecond pulsars of the nearby globular cluster 47 Tucunae

1993 ◽  
Vol 405 ◽  
pp. L59 ◽  
Author(s):  
D. Barret ◽  
P. Mandrou ◽  
M. Denis ◽  
J. F. Olive ◽  
P. Laurent ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Gamma Ray ◽  
Millisecond Pulsars ◽  
X Ray ◽  
Upper Limits ◽  
Gamma Ray Emission

scholarly journals X-ray and gamma-ray emission from millisecond pulsars

2003 ◽  
Vol 398 (2) ◽  
pp. 639-646 ◽  
Author(s):  
L. Zhang ◽  
K. S. Cheng
Keyword(s):  
Gamma Ray ◽  
Millisecond Pulsars ◽  
X Ray ◽  
Gamma Ray Emission

EGRET upper limits to the high-energy gamma-ray emission from the millisecond pulsars in nearby globular clusters

1994 ◽  
Vol 435 ◽  
pp. 218 ◽  
Author(s):  
P. F. Michelson ◽  
D. L. Bertsch ◽  
K. Brazier ◽  
J. Chiang ◽  
B. L. Dingus ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Gamma Ray ◽  
High Energy ◽  
Millisecond Pulsars ◽  
High Energy Gamma ◽  
Upper Limits ◽  
Energy Gamma ◽  
Gamma Ray Emission

Upper limits of hard gamma-ray emission from six X-ray sources

1975 ◽  
Vol 196 ◽  
pp. 593
Author(s):  
M. Campbell ◽  
J. Alexander ◽  
S. E., Jr. Ball ◽  
K. Greisen ◽  
D. Koch ◽  
...  
Keyword(s):  
Gamma Ray ◽  
X Ray ◽  
Upper Limits ◽  
Gamma Ray Emission

A Combined Model for the X‐Ray to Gamma‐Ray Emission of Cygnus X‐1

1998 ◽  
Vol 502 (1) ◽  
pp. 428-436 ◽  
Author(s):  
Igor V. Moskalenko ◽  
Werner Collmar ◽  
Volker Schonfelder
Keyword(s):  
Gamma Ray ◽  
Combined Model ◽  
X Ray ◽  
Gamma Ray Emission

scholarly journals CALET UPPER LIMITS ON X-RAY AND GAMMA-RAY COUNTERPARTS OF GW151226

2016 ◽  
Vol 829 (1) ◽  
pp. L20 ◽  
Author(s):  
O. Adriani ◽  
Y. Akaike ◽  
K. Asano ◽  
Y. Asaoka ◽  
M. G. Bagliesi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
X Ray ◽  
Upper Limits

scholarly journals A Chandra look at the X-ray faint millisecond pulsars in the globular cluster NGC 6752

2014 ◽  
Vol 441 (1) ◽  
pp. 757-768 ◽  
Author(s):  
L. M. Forestell ◽  
C. O. Heinke ◽  
H. N. Cohn ◽  
P. M. Lugger ◽  
G. R. Sivakoff ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Millisecond Pulsars ◽  
X Ray

scholarly journals Systematic search for very-high-energy gamma-ray emission from bow shocks of runaway stars

2018 ◽  
Vol 612 ◽  
pp. A12 ◽  
Author(s):  
◽  
H. Abdalla ◽  
A. Abramowski ◽  
F. Aharonian ◽  
F. Ait Benkhali ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Bow Shock ◽  
Systematic Search ◽  
Upper Limits ◽  
Very High Energy ◽  
Bow Shocks ◽  
Gamma Ray Emission ◽  
Runaway Stars ◽  
Very High

Context. Runaway stars form bow shocks by ploughing through the interstellar medium at supersonic speeds and are promising sources of non-thermal emission of photons. One of these objects has been found to emit non-thermal radiation in the radio band. This triggered the development of theoretical models predicting non-thermal photons from radio up to very-high-energy (VHE, E ≥ 0.1 TeV) gamma rays. Subsequently, one bow shock was also detected in X-ray observations. However, the data did not allow discrimination between a hot thermal and a non-thermal origin. Further observations of different candidates at X-ray energies showed no evidence for emission at the position of the bow shocks either. A systematic search in the Fermi-LAT energy regime resulted in flux upper limits for 27 candidates listed in the E-BOSS catalogue.Aim. Here we perform the first systematic search for VHE gamma-ray emission from bow shocks of runaway stars.Methods. Using all available archival H.E.S.S. data we search for very-high-energy gamma-ray emission at the positions of bow shock candidates listed in the second E-BOSS catalogue release. Out of the 73 bow shock candidates in this catalogue, 32 have been observed with H.E.S.S.Results. None of the observed 32 bow shock candidates in this population study show significant emission in the H.E.S.S. energy range. Therefore, flux upper limits are calculated in five energy bins and the fraction of the kinetic wind power that is converted into VHE gamma rays is constrained.Conclusions. Emission from stellar bow shocks is not detected in the energy range between 0.14 and 18 TeV.The resulting upper limits constrain the level of VHE gamma-ray emission from these objects down to 0.1–1% of the kinetic wind energy.

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