Python coding for astronomy (Lengthy, but need help)

Somewhat quick explanation on the project. I have so far correctly matched spectra of stars between two libraries of different quantites.

All the unmatched stars are supposed to be returned listing their coordinates (RA and DEC), where then I would use what is returned to download their png files

and create a webpage of all the unnmatched spectra. Example so far:

(Matching code)

(Returns)

python sdssDR13spectroquery.py 127.803594774 48.3011272115 python sdssDR13spectroquery.py 127.803594774 48.3011272115 python sdssDR13spectroquery.py 127.803594774 48.3011272115 python sdssDR13spectroquery.py 127.803594774 48.3011272115 python sdssDR13spectroquery.py 127.991699025 48.261116025 python sdssDR13spectroquery.py 127.803594774 48.3011272115 python sdssDR13spectroquery.py 127.991699025 48.261116025 * python sdssDR13spectroquery.py 127.991699025 48.261116025 * python sdssDR13spectroquery.py 127.991699025 48.261116025 * python sdssDR13spectroquery.py 127.840274257 48.2399531789

(Problem)

It is returning duplicates * , and I cannot find why. Also, the list above is in the thousands, so I just put a small example of what is happening.

Please help with this if possible. Panicked.

from astropy.coordinates import SkyCoord from astropy import units as u import fitsio import numpy as np from astropy.io import fits hdulist = fits.open('/d/userst rimble/Desktop/Cats/DR120.fits') ral-hdulist [1] . data [ ' RA' ] decl=hdulist [1] .data [ ' DEC' ] DR12Q=SkyCoord (ra-ra1*u.degree, dec=aec1*u.degree) objs=fitsio. read(' /d/userstrimble/Desktop/Cats/sequels. fits ' ) w= np . where ( ((objs["EBOSS TARGETO"] & 2**16) !=0 ( (objs["EBOSS TARGETO"] & 2*+17) != 0) objs=objs [w] ra2-objs['RA'] dec2=objs [ ' DEC ' ] sequels = SkyCoord (ra-ra2*u.degree, dec=dec2*u.degree) 1*u.arcsec) idxseq, idxDR, d2d, d3d= DR12Q.search-around-sky ( sequels, #sets array at 0 index matched = np. zeros (len(sequels)) #every match is a 1 matched [idxseq]-1 #unmatched are 0? a = np . where (matched=0) for a in ra2: print ("python sdssDR13spectroquery.py" + str (ra2 [a])+""+ str (dec2 [a]) )