Public Data Access Overview / Discussion Forum

Dear Dylan,

I am to save full cutouts from the few subhalos in a given mass range from the TNG50-2 subhalos. I am following the API cookbook to save the cutouts, however, I am getting errors like this : HTTPError: 404 Client Error: Not Found for url: https://data-eu.tng-project.org/cutout/subhalo/L35n1080TNG/99/0/67108863.255.0.7.262143.16777215/?token=60d32c7227a3bfe83127.

Here is what I am doing.

## Mass search ##
mass_min = 10**13.5/1e10*0.6774
mass_max = 10**14.5/1e10*0.6774
search_query = "?mass__gt=" + str(mass_min) + "&mass__lt=" + str(mass_max)  ## Making the mass search option ###

### printing the subhalos id ###
ids_tgn50 = [ subhalos['results'][i]['id'] for i in range(subhalos['count'])]
print (ids_tgn50)
[0, 10482, 16110, 19546, 24112, 31028, 33290]

### get function from AIP page ###

def get(path, params=None):
# make HTTP GET request to path
    headers = {"api-key":"my_key here"}
    r = requests.get(path, params=params, headers=headers)
    # raise exception if response code is not HTTP SUCCESS (200)
    r.raise_for_status()

    if r.headers['content-type'] == 'application/json':
        return r.json() # parse json responses automatically

    if 'content-disposition' in r.headers:
        filename = r.headers['content-disposition'].split("filename=")[1]
        with open(filename, 'wb') as f:
            f.write(r.content)
        return filename # return the filename string

    return r

for id in ids_tgn50:
    url = "http://www.tng-project.org/api/TNG50-2/snapshots/99/subhalos/"+str(id)+"/cutout.hdf5"
    print (url)
    saved_filename = get(url)

Here it is not working. Could you please check it once? Thank you.

Regards
Avinash

Potentially this is an issue that the cutouts you are requesting are simply extremely large.

Can you try to add a specific particle type/field you want (this is called a cutout_query in the API documentation).

e.g. if you add ?gas=Density to the end of your URL, to only request the gas cell densities, then this works for me.

Dear Dylan,

Thanks for the response. Yes, it's working for me as well. :)
Thank you.

Regards
Avinash