+1 vote
39 views

I am following your notebook on 

How to use the Simple Image Access (SIA) Service to make image cutouts

However, there are some empty regions in the cutout when using the following coordinates:

15.674, -21.882

Why is this occurring? I know that the region is well covered as I have download photometric and photoz information from the same exact region. More important, is there a way to solve this issue?

Related to this, Howe can I download gri-bands fits images of a large list of coordinates?

thanks
by humehe (150 points)
edited by 0 | 39 views

1 Answer

0 votes

Apologies for the late reply (it was travel season for the team..)
Please note that currently we do not offer a DR10 SIA service. If you are setting up a SIA service URL like this

DEF_ACCESS_URL = "https://datalab.noirlab.edu/sia/ls_dr10"
svc = sia.SIAService(DEF_ACCESS_URL)

ra = 15.674 # in degrees
dec = -21.882 # in degrees
fov = 0.1 # in degrees
imgTable = svc.search((ra,dec), (fov/np.cos(dec*np.pi/180), fov), verbosity=2).to_table()

You will get a 404 error.

For an existing SIA service, e.g., ls_dr9, you will get results:

DEF_ACCESS_URL = "https://datalab.noirlab.edu/sia/ls_dr9"
svc = sia.SIAService(DEF_ACCESS_URL)

ra = 15.674 # in degrees
dec = -21.882 # in degrees
fov = 0.1 # in degrees
imgTable = svc.search((ra,dec), (fov/np.cos(dec*np.pi/180), fov), verbosity=2).to_table()
len(imgTable)

--> 39

Best,
Robert

by robertdemo (8.1k points)

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