Pre-release
This release is a pre-release and may not be stable for production use.
A uniform interface for a number of 2D and 3D maps of interstellar dust reddening/extinction.
Supported Dust Maps
Schlegel, Finkbeiner & Davis (1998; SFD’98)
Burstein & Heiles (1982; BH’82)
Getting the Data
The data for some dust maps must be downloaded separately.
Map | Data included |
—— | :———–: |
SFD’98 | no |
BH’82 | yes |
Querying the Maps
Maps are queried using astropy.Coordinate coordinates. This means that any coordinate system can be used as input. For example, we can query SFD’98 as follows:
>>> from dustmaps.sfd import SFDQuery
>>> from astropy.coordinates import SkyCoord
>>>
>>> sfd = SFDQuery()
>>>
>>> c = SkyCoord(
'05h00m00.00000s',
'+30d00m00.0000s',
frame='icrs'
)
>>> print sfd(c)
0.483961
Above, we’ve used the ICRS coordinate system (the inputs are RA and Dec). We can use other coordinate systems, such as Galactic coordinates, and we can provide coordinate arrays. The following example uses both features:
>>> c = SkyCoord(
[75.00000000, 130.00000000],
[-89.00000000, 10.00000000],
frame='galactic',
unit='deg'
)
>>> print sfd(c)
[ 0.0146584 0.97695869]
