Fermi GBM Detector Definitions (gdt.missions.fermi.gbm.detectors)

The GbmDetectors class contains the naming and orientation definitions of the GBM detectors.

The GBM detectors have three different naming/indexing conventions, although the one that is used most is the 'n0', 'n1',...,'b0', 'b1' naming convention.

We can easily retrieve a detector definition by using standard “dot” notation:

>>> from gdt.missions.fermi.gbm.detectors import GbmDetectors
>>> GbmDetectors.n0
<GbmDetectors: n0>

We can retrive the full name of the detector, which is what is mostly used in the FITS headers of the GBM data files:

>>> GbmDetectors.nb.full_name
'NAI_11'

There is also a standard detector indexing scheme that is used for all GBM detectors:

>>> GbmDetectors.b0.number
12

Since the GbmDetectors class inherits from the Detectors base class, we can also retrieve the pointing information of a GBM detector:

>>> # detector azimuth, zenith
>>> GbmDetectors.from_str('n2').pointing()
(<Quantity 58.44 deg>, <Quantity 90.21 deg>)

>>> # detector elevation
GbmDetectors.from_full_name('NAI_02').elevation
<Quantity -0.21 deg>

We can also iterate over all GBM detectors:

>>> # the list of detector names
>>> print([det.name for det in GbmDetectors])
['n0', 'n1', 'n2', 'n3', 'n4', 'n5', 'n6', 'n7', 'n8', 'n9', 'na', 'nb',
'b0', 'b1']

We can also get the list of BGO (or NaI) detectors:

>>> GbmDetectors.bgo()
[<GbmDetectors: b0>, <GbmDetectors: b1>]

And we can test if a particular detector is an NaI or BGO detector:

>>> print([det.is_nai() for det in GbmDetectors])
[True, True, True, True, True, True, True, True, True, True, True, True,
False, False]

Reference/API

gdt.missions.fermi.gbm.detectors Module

Classes

GbmDetectors(value[, names, module, ...])

The GBM Detector name and orientation definitions.

Class Inheritance Diagram