sloancone.cone_search module ∞

Perform a conesearch of SDSS at a given location with a specified search radius

Author: David Young

class cone_search(log, ra, dec, searchRadius, nearest, outputFormat='table', galaxyType=False)[source] ∞

Bases: object

The worker class for the cone_search module

Key Arguments

log – logger
ra – ra in sexigesimal or decimal degrees
dec – dec in sexigesimal or decimal degrees
searchRadius – search radius in arcsecs
nearest – show closest match only
outputFormat – output format (table or csv)

Usage

from sloancone.cone_search import cone_search
csResults = cone_search(
    log=log,
    ra="12:45:23.2323",
    dec="30.343122",
    searchRadius=60.,
    nearest=False,
    outputFormat="table",
    galaxyType="all"
).get()

print(csResults )

This code outputs the following:

+---------------------------+---------+-----------+----------+--------+------------+---------+-------------+--------------------+--------------------------+-------------------------+
| sdss_name                 | type    | ra        | dec      | specz  | specz_err  | photoz  | photoz_err  | separation_arcsec  | separation_north_arcsec  | separation_east_arcsec  |
+---------------------------+---------+-----------+----------+--------+------------+---------+-------------+--------------------+--------------------------+-------------------------+
| SDSS J124521.85+302046.0  | galaxy  | 191.3410  | 30.3461  | None   | None       | 0.3443  | 0.1007      | 20.8856            | 10.8005                  | -17.8762                |
| SDSS J124522.39+302100.4  | galaxy  | 191.3433  | 30.3501  | None   | None       | 0.3172  | 0.0901      | 27.4400            | 25.2212                  | -10.8094                |
| SDSS J124522.08+302007.4  | galaxy  | 191.3420  | 30.3354  | None   | None       | 0.3672  | 0.1133      | 31.4720            | -27.7701                 | -14.8090                |
| SDSS J124524.95+302105.7  | galaxy  | 191.3540  | 30.3516  | None   | None       | 0.2721  | 0.0311      | 37.8154            | 30.5314                  | 22.3124                 |
| SDSS J124524.57+302000.2  | galaxy  | 191.3524  | 30.3334  | None   | None       | 0.4181  | 0.0965      | 39.1194            | -35.0377                 | 17.3979                 |
| SDSS J124519.23+302042.5  | galaxy  | 191.3302  | 30.3452  | None   | None       | 0.2347  | 0.0749      | 52.2402            | 7.3538                   | -51.7200                |
| SDSS J124521.36+301943.9  | galaxy  | 191.3390  | 30.3289  | None   | None       | 0.1978  | 0.0699      | 56.7372            | -51.3133                 | -24.2086                |
| SDSS J124519.89+302115.9  | galaxy  | 191.3329  | 30.3544  | None   | None       | 0.9105  | 0.0821      | 59.3096            | 40.6688                  | -43.1703                |
+---------------------------+---------+-----------+----------+--------+------------+---------+-------------+--------------------+--------------------------+-------------------------+

To return results in a traditional CSV format:

from sloancone.cone_search import cone_search
csResults = cone_search(
    log=log,
    ra="112.233432",
    dec="15:34:31.22",
    searchRadius=60.,
    nearest=True,
    outputFormat="csv",
    galaxyType="all"
).get()

print(csResults)

This code outputs the following:

sdss_name,type,ra,dec,specz,specz_err,photoz,photoz_err,separation_arcsec,separation_north_arcsec,separation_east_arcsec
SDSS J072855.31+153454.6,galaxy,112.2305,15.5818,,,0.7211,0.0719,25.5528,23.4273,-10.2034

To filter the result be a redshift type (specz or photoz)

from sloancone.cone_search import cone_search
csResults = cone_search(


        log=log,
        ra="12:45:23.2323",
        dec="30.343122",
        searchRadius=600.,
        nearest=False,
        outputFormat="table",
        galaxyType="specz"
    ).get()

    print(csResults )

This code outputs the following:

```plain
+---------------------------+---------+-----------+----------+---------+------------+--------------------+--------------------------+-------------------------+
```

   | sdss_name                 | type    | ra        | dec      | specz   | specz_err  | separation_arcsec  | separation_north_arcsec  | separation_east_arcsec  |
   +---------------------------+---------+-----------+----------+---------+------------+--------------------+--------------------------+-------------------------+
   | SDSS J124540.06+301923.0  | galaxy  | 191.4169  | 30.3231  | 0.3629  | 0.0002     | 229.5373           | -72.2170                 | 217.8809                |
   | SDSS J124534.33+301624.6  | galaxy  | 191.3931  | 30.2735  | 0.2609  | 0.0000     | 288.8809           | -250.5509                | 143.7929                |
   | SDSS J124512.46+301502.3  | galaxy  | 191.3019  | 30.2506  | 0.5810  | 0.0002     | 360.9520           | -332.9018                | -139.5091               |
   | SDSS J124512.46+301502.3  | galaxy  | 191.3019  | 30.2506  | 0.5809  | 0.0002     | 360.9520           | -332.9018                | -139.5091               |
   | SDSS J124544.87+302435.6  | galaxy  | 191.4370  | 30.4099  | 0.2254  | 0.0000     | 369.1276           | 240.3704                 | 280.1380                |
   | SDSS J124547.42+302532.8  | galaxy  | 191.4476  | 30.4258  | 0.4473  | 0.0001     | 431.9371           | 297.5669                 | 313.0872                |
   | SDSS J124454.28+301700.6  | galaxy  | 191.2262  | 30.2835  | 0.2599  | 0.0000     | 431.9447           | -214.5446                | -374.8959               |
   | SDSS J124558.38+301904.7  | galaxy  | 191.4933  | 30.3180  | 0.1767  | 0.0000     | 463.9608           | -90.4407                 | 455.0606                |
   | SDSS J124544.31+301417.7  | galaxy  | 191.4347  | 30.2383  | 0.3632  | 0.0000     | 465.9112           | -377.4610                | 273.1236                |
   | SDSS J124543.24+301319.2  | galaxy  | 191.4302  | 30.2220  | 0.0669  | 0.0000     | 507.2387           | -436.0132                | 259.1979                |
   | SDSS J124557.99+302437.8  | galaxy  | 191.4916  | 30.4105  | 0.4469  | 0.0002     | 511.0694           | 242.6379                 | 449.7987                |
   | SDSS J124602.33+302241.3  | galaxy  | 191.5097  | 30.3782  | 0.4365  | 0.0001     | 521.5570           | 126.1410                 | 506.0733                |
   | SDSS J124602.33+302241.3  | galaxy  | 191.5097  | 30.3782  | 0.4365  | 0.0001     | 521.5570           | 126.1410                 | 506.0733                |
   | SDSS J124605.96+301913.6  | galaxy  | 191.5248  | 30.3205  | 0.1761  | 0.0000     | 559.2108           | -81.5693                 | 553.2298                |
   | SDSS J124439.37+301949.6  | galaxy  | 191.1640  | 30.3305  | 0.2219  | 0.0000     | 569.6536           | -45.5571                 | -567.8291               |
   | SDSS J124439.37+301949.6  | galaxy  | 191.1640  | 30.3305  | 0.2220  | 0.0000     | 569.6536           | -45.5571                 | -567.8291               |
   | SDSS J124538.93+302945.0  | galaxy  | 191.4122  | 30.4958  | 0.2252  | 0.0000     | 586.1380           | 549.8198                 | 203.1158                |
   | SDSS J124450.57+301333.8  | galaxy  | 191.2107  | 30.2261  | 0.4373  | 0.0001     | 597.1297           | -421.4088                | -423.0586               |
   | SDSS J124450.57+301333.8  | galaxy  | 191.2107  | 30.2261  | 0.4377  | 0.0001     | 597.1297           | -421.4088                | -423.0586               |
   +---------------------------+---------+-----------+----------+---------+------------+--------------------+--------------------------+-------------------------+

Finally, we can also search for stars and galaxies by selecting ``galaxyType=False``:

```python
from sloancone.cone_search import cone_search
csResults = cone_search(
    log=log,
    ra="12:45:23.2323",
    dec="30.343122",
    searchRadius=60.,
    nearest=False,
    outputFormat="table",
    galaxyType=False
).get()

print(csResults)
```

```plain
+---------------------------+---------+-----------+----------+----------+------------+---------+-------------+--------------------+--------------------------+-------------------------+
| sdss_name                 | type    | ra        | dec      | specz    | specz_err  | photoz  | photoz_err  | separation_arcsec  | separation_north_arcsec  | separation_east_arcsec  |
+---------------------------+---------+-----------+----------+----------+------------+---------+-------------+--------------------+--------------------------+-------------------------+
| SDSS J124521.85+302046.0  | galaxy  | 191.3410  | 30.3461  | None     | None       | 0.3443  | 0.1007      | 20.8856            | 10.8005                  | -17.8762                |
| SDSS J124524.92+302042.7  | star    | 191.3539  | 30.3452  | None     | None       | None    | None        | 23.2234            | 7.5490                   | 21.9622                 |
| SDSS J124521.68+302016.9  | star    | 191.3403  | 30.3380  | -0.0001  | 0.0000     | None    | None        | 27.1558            | -18.2960                 | -20.0672                |
| SDSS J124522.39+302100.4  | galaxy  | 191.3433  | 30.3501  | None     | None       | 0.3172  | 0.0901      | 27.4400            | 25.2212                  | -10.8094                |
| SDSS J124522.08+302007.4  | galaxy  | 191.3420  | 30.3354  | None     | None       | 0.3672  | 0.1133      | 31.4720            | -27.7701                 | -14.8090                |
| SDSS J124524.95+302105.7  | galaxy  | 191.3540  | 30.3516  | None     | None       | 0.2721  | 0.0311      | 37.8154            | 30.5314                  | 22.3124                 |
| SDSS J124524.57+302000.2  | galaxy  | 191.3524  | 30.3334  | None     | None       | 0.4181  | 0.0965      | 39.1194            | -35.0377                 | 17.3979                 |
| SDSS J124521.67+301955.1  | star    | 191.3403  | 30.3320  | None     | None       | None    | None        | 44.8763            | -40.0699                 | -20.2060                |
| SDSS J124526.25+302103.7  | star    | 191.3594  | 30.3511  | None     | None       | None    | None        | 48.4191            | 28.5417                  | 39.1124                 |
| SDSS J124519.23+302042.5  | galaxy  | 191.3302  | 30.3452  | None     | None       | 0.2347  | 0.0749      | 52.2402            | 7.3538                   | -51.7200                |
| SDSS J124521.36+301943.9  | galaxy  | 191.3390  | 30.3289  | None     | None       | 0.1978  | 0.0699      | 56.7372            | -51.3133                 | -24.2086                |
| SDSS J124522.15+301937.9  | star    | 191.3423  | 30.3272  | None     | None       | None    | None        | 58.9703            | -57.2852                 | -13.9962                |
| SDSS J124519.89+302115.9  | galaxy  | 191.3329  | 30.3544  | None     | None       | 0.9105  | 0.0821      | 59.3096            | 40.6688                  | -43.1703                |
| SDSS J124526.04+301947.9  | star    | 191.3585  | 30.3300  | None     | None       | None    | None        | 59.6986            | -47.3115                 | 36.4080                 |
| SDSS J124524.95+302130.6  | star    | 191.3540  | 30.3585  | None     | None       | None    | None        | 59.7431            | 55.4049                  | 22.3502                 |
+---------------------------+---------+-----------+----------+----------+------------+---------+-------------+--------------------+--------------------------+-------------------------+
```

get()[source] ∞

get the cone_search object

Return

results – the results of the conesearch