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Exploiting Orbital Constraints from Optical Data to Detect Binary Gamma-Ray Pulsars.
- Source :
-
Astrophysical Journal . 10/2/2020, Vol. 901 Issue 2, p1-28. 28p. - Publication Year :
- 2020
-
Abstract
- It is difficult to discover pulsars via their gamma-ray emission because current instruments typically detect fewer than one photon per million rotations. This creates a significant computing challenge for isolated pulsars, where the typical parameter search space spans wide ranges in four dimensions. It is even more demanding when the pulsar is in a binary system, where the orbital motion introduces several additional unknown parameters. Building on earlier work by Pletsch & Clark, we present optimal methods for such searches. These can also incorporate external constraints on the parameter space to be searched, for example, from optical observations of a presumed binary companion. The solution has two parts. The first is the construction of optimal search grids in parameter space via a parameter space metric, for initial semicoherent searches and subsequent fully coherent follow-ups. The second is a method to demodulate and detect the periodic pulsations. These methods have different sensitivity properties than traditional radio searches for binary pulsars and might unveil new populations of pulsars. [ABSTRACT FROM AUTHOR]
- Subjects :
- *BINARY pulsars
*METRIC spaces
*PULSARS
*GAMMA rays
*VECTOR beams
PULSAR detection
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 901
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Astrophysical Journal
- Publication Type :
- Academic Journal
- Accession number :
- 146296588
- Full Text :
- https://doi.org/10.3847/1538-4357/abaf53