Copy edit notebook 04.

Author: jeffcarlin

04_Intro_to_Butler.ipynb

@@ -22,8 +22,8 @@
     "The goals of this notebook are to:<br>\n",
     "1. create an instance of the Butler<br>\n",
     "2. explore the DP0.1 data repository<br>\n",
-    "3. retrive and display some image and catalog data<br>\n",
-    "4. create in image cutout at a user-specified coordinate<br>\n",
+    "3. retrieve and display some image and catalog data<br>\n",
+    "4. create an image cutout at a user-specified coordinate<br>\n",
     "5. retrieve and plot catalog data \n",
     "\n",
     "\n",
@@ -151,7 +151,7 @@
     "* `refcats` - refers to the reference catalogs used for astrometric and photometric calibration\n",
     "* `skymaps` - are the geometric representations of the sky coverage\n",
     "\n",
-    "Collections can be nested, so we can access to everything for DC2 Run 2.2i (the primary DP0.1 data set) by selecting the collection `2.2i/runs/DP0.1`. This is a pointer to other collections that expand out recursively... More on collections can be found here: https://pipelines.lsst.io/v/weekly/modules/lsst.daf.butler/organizing.html#collections"
+    "Collections can be nested, so we can access everything for DC2 Run 2.2i (the primary DP0.1 data set) by selecting the collection `2.2i/runs/DP0.1`. This is a pointer to other collections that expand out recursively... More on collections can be found here: https://pipelines.lsst.io/v/weekly/modules/lsst.daf.butler/organizing.html#collections"
    ]
   },
   {
@@ -208,9 +208,9 @@
    "source": [
     "Again, this list may seem a bit overwhelming, but we can extract some information from the names of the dataset types:\n",
     "\n",
-    "- `calexp` - Refers to individual calibrated exposure\n",
-    "- `deepCoadd` - Refers to products produced on the coadd images (both images and and source catalogs)\n",
-    "- `src` - refers the the catalog of sources\n",
+    "- `calexp` - refers to individual calibrated exposure\n",
+    "- `deepCoadd` - refers to products produced on the coadd images (both images and and source catalogs)\n",
+    "- `src` - refers to the catalog of sources\n",
     "- `skyMap` - refers to geometric representations of the sky coverage\n",
     "\n",
     "<b> Which data sets are most appropriate for DP0.1? </b><br>\n",
@@ -226,7 +226,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We access specific data sets through a set of specifications known as a data identifier (`dataId`). Each `DatasetType` can be identified with a different set of properties, so it is important to be able to determine what properties need to be specified to access data of a specific type. It is possible to get all `DatasetRef` (which include the `dataId`) for a specific `datasetType` in a specific collection with a query like this. Note that this doesn't necessarily guarentee that the specific data set exists, so we include a check that the data set has a valid Uniform Resource Identifier (URI)."
+    "We access specific data sets through a set of specifications known as a data identifier (`dataId`). Each `DatasetType` can be identified with a different set of properties, so it is important to be able to determine what properties need to be specified to access data of a specific type. It is possible to get all `DatasetRef` (which include the `dataId`) for a specific `datasetType` in a specific collection with a query like this. Note that this doesn't necessarily guarantee that the specific data set exists, so we include a check that the data set has a valid Uniform Resource Identifier (URI)."
    ]
   },
   {
@@ -344,7 +344,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The `calexp` is a calibrated CCD from a single exposure. We'll use the afwDisplay interface to show the pixel values and mask plane (more on afwDisplay can be found in other notebooks)."
+    "The `calexp` is a calibrated CCD image from a single exposure. We'll use the afwDisplay interface to show the pixel values and mask plane (more on afwDisplay can be found in other notebooks)."
    ]
   },
   {
@@ -364,7 +364,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now that we have a calibrated image, we may want to get the catlog of sources that were extracted from it. The `src` catalog associated with this `calexp` we pass the `dataId` to the butler with the `src` datasetType. Note that this performs another query to the registry database to find the `src` catalog that matches our dataId requirements."
+    "Now that we have a calibrated image, we may want to get the catalog of sources that were extracted from it. To get the `src` catalog associated with this `calexp` we pass the `dataId` to the butler with the `src` datasetType. Note that this performs another query to the registry database to find the `src` catalog that matches our dataId requirements."
    ]
   },
   {
@@ -658,9 +658,9 @@
    "metadata": {},
    "source": [
     "<br>\n",
-    "The catalogs are very large and it is not feasible to try and retrieve it in its entirety.\n",
+    "The catalogs are very large and it is not feasible to try and retrieve them in their entirety.\n",
     "Instead, in this example we identify the tract and patch of interest and retrieve only catalog data for a small region of sky.\n",
-    "Use the same ra and dec coordinates as above to find the patch and tract."
+    "We use the same ra and dec coordinates as above to find the patch and tract."
    ]
   },
   {
@@ -763,6 +763,13 @@
     "plt.ylabel('Dec')\n",
     "plt.title('Butler coadd_forced_src objects in tract 4638 patch 43')"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {