Update 103_7 notebook

Author: plazas

DP1/100_How_to_Use_RSP_Tools/103_Image_access_and_display/103_7_Big_deep_coadd_cutout.ipynb

@@ -22,7 +22,7 @@
     "Data Release: <a href=\"https://dp1.lsst.io\">Data Preview 1</a> <br>\n",
     "Container Size: large <br>\n",
     "LSST Science Pipelines version: r29.2.0 <br>\n",
-    "Last verified to run: 2025-09-22 <br>\n",
+    "Last verified to run: 2025-10-15 <br>\n",
     "Repository: <a href=\"https://github.com/lsst/tutorial-notebooks\">github.com/lsst/tutorial-notebooks</a> <br>"
    ]
   },
@@ -344,8 +344,24 @@
    "metadata": {},
    "source": [
     "Use the BCG location to obtain the pixel scale there.\n",
-    "First, get the WCS of the patch and tract where the BCG is located.\n",
-    "From the 300 DP1 tutorials, the patch and tract numbers are 10463 and 62 respectively."
+    "First, get the WCS of the patch and tract where the BCG is located."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ae116f76-2aca-447f-833f-75bc36a7ebab",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "bcg_point = SpherePoint(ra_bcg * degrees,\n",
+    "                        dec_bcg * degrees)\n",
+    "bcg_tract = skymap.findTract(bcg_point)\n",
+    "bcg_patch = bcg_tract.findPatch(bcg_point)\n",
+    "\n",
+    "bcg_tract_number = bcg_tract.tract_id\n",
+    "bcg_patch_number = bcg_patch.getSequentialIndex()\n",
+    "print(bcg_tract_number, bcg_patch_number)"
    ]
   },
   {
@@ -357,7 +373,7 @@
    "source": [
     "bcg_data_ref = next(\n",
     "    ref for ref in tract_container\n",
-    "    if ref.dataId[\"tract\"] == 10463 and ref.dataId[\"patch\"] == 62\n",
+    "    if ref.dataId[\"tract\"] == bcg_tract_number and ref.dataId[\"patch\"] == bcg_patch_number\n",
     ")"
    ]
   },