SDSS DR12 query returns wrong url: HTTP Error 404: Not Found

[banados]

This problem happens when I tried to get a spectrum with the DR12 Plate MJD FiberID parameters, it does not crash if I used the DR7 parameters.

This is easier to explain with an example:

from astroquery.sdss import SDSS
s = SDSS.get_spectra(plate=7167, mjd=56604, fiberID=182) 

returns HTTPError: HTTP Error 404: Not Found

This is because it is querying the wrong url:

s2 = SDSS.get_spectra_async(plate=7167, mjd=56604, fiberID=182)
[Downloaded object from URL http://data.sdss3.org/sas/dr12/boss/spectro/redux/b'v5_7_0'/spectra/7167/spec-7167-56604-0182.fits with ID 5558563336]

The problem is with the b'v5_7_0' part it should be just v5_7_0 without the ' '

And the correct URL that takes you to download the spectrum is

http://data.sdss3.org/sas/dr12/boss/spectro/redux/v5_7_0/spectra/7167/spec-7167-56604-0182.fits

I'm sure the problem is in this part, especifically in the {run2d} argument.

This should be easy to fix but I could not find the root of the problem in the code

[MSeifert04]

Thank you for the report and the analysis. 👍

Your suspicion is correct about run2d. I'm working on a fix.

[banados]

Thanks @MSeifert04 That solves that particular problem. I updated my version with your updates while waiting for the PR to be merged.

Now I found another problem at least for one specific object but it might occur on more:

s = SDSS.get_spectra_async(plate=5177, mjd=56245, fiberID=114)

ValueError: Some errors were detected !
    Line #60 (got 4 columns instead of 1)
    Line #123 (got 2 columns instead of 1)
    Line #124 (got 2 columns instead of 1)
    Line #129 (got 4 columns instead of 1)
    Line #130 (got 2 columns instead of 1)
    Line #131 (got 2 columns instead of 1)
    Line #132 (got 2 columns instead of 1)
    Line #134 (got 4 columns instead of 1)
    Line #135 (got 2 columns instead of 1)
    Line #137 (got 2 columns instead of 1)

The problem is this time in here

The io.BytesIO(response.content) returns a web page with an error that cannot be read by np.genfromtxt nor taken care by the if above it.

However, I don't think there should be any error raised for this particular object, as its spectrum does exist:

http://skyserver.sdss.org/dr12/en/tools/explore/summary.aspx?plate=5177&mjd=56245&fiber=114

Let me know if I should open a new issue for this problem/object

[MSeifert04]

@banados I think you should open another issue, because I can't reproduce it right now. Could you include your astropy/astroquery/numpy/python version and the exact code which produces the error?

[banados]

Done #743