Merge pull request #132 from lsst/u/jcarlin/309_2_fixup

Fix PS1 search radius in NB 309_2

Author: jeffcarlin

DP1/300_Science_Demos/309_Astronomical_analysis/309_2_convert_between_photometric_systems.ipynb

@@ -131,9 +131,9 @@
    "id": "b75d077d-75eb-4634-8c16-e98c4645c8b8",
    "metadata": {},
    "source": [
-    "Define the approximate central coordinates of the ECDFS field and a radius of 0.25 degrees about this center.\n",
+    "Define the approximate central coordinates of the ECDFS field and a radius of 0.24 degrees about this center.\n",
     "\n",
-    "_Note: The radius is restricted to 0.25 degrees here, since the public PanSTARRS1 DR2 TAP service -- which is used later in this notebook -- is currently restricted to cone searches of no larger than 0.25 degrees._"
+    "_Note: The radius is restricted to 0.24 degrees here, since the public PanSTARRS1 DR2 TAP service -- which is used later in this notebook -- is currently restricted to cone searches less than 0.25 degrees._"
    ]
   },
   {
@@ -145,7 +145,7 @@
    "source": [
     "ra_cen = 53.2\n",
     "dec_cen = -28.1\n",
-    "radius = 0.25"
+    "radius = 0.24"
    ]
   },
   {
@@ -382,7 +382,7 @@
    "id": "a965e6e7-c8d4-4ba3-a8b0-e0f1150431a3",
    "metadata": {},
    "source": [
-    "> **Figure 1:** ($r$-$i$) vs. ($g$-$r$) color-color diagram for point sources in a 0.25-degree radius of the ECDFS field in DP1 data. Points are calculated from `Object` table PSF magnitudes, and are color-coded by their $r$-band PSF magnitude error, ranging from 0 to 0.02 magnitudes. The figure shows the typical stellar locus as a narrow sequence with a sharp upturn at red colors."
+    "> **Figure 1:** ($r$-$i$) vs. ($g$-$r$) color-color diagram for point sources in a 0.24-degree radius of the ECDFS field in DP1 data. Points are calculated from `Object` table PSF magnitudes, and are color-coded by their $r$-band PSF magnitude error, ranging from 0 to 0.02 magnitudes. The figure shows the typical stellar locus as a narrow sequence with a sharp upturn at red colors."
    ]
   },
   {
@@ -492,7 +492,7 @@
    "source": [
     "#### 3.3.1  Grab ECDFS data from PanSTARRS1 DR2\n",
     "\n",
-    "Use `pyvo` to query the PanSTARRS1 DR2 TAP service, using suitable constraints for point sources. Since the PanSTARRS1 DR2 TAP service has a cone search maximum search radius of 0.25 deg, keep the search to that fixed radius."
+    "Use `pyvo` to query the PanSTARRS1 DR2 TAP service, using suitable constraints for point sources. Since the PanSTARRS1 DR2 TAP service has a cone search maximum search radius of 0.25 deg, keep the search to less than that fixed radius."
    ]
   },
   {
@@ -525,12 +525,12 @@
     "            soa.primaryDetection, soa.bestDetection\n",
     "        FROM dbo.MeanObjectView o\n",
     "        LEFT JOIN StackObjectAttributes AS soa ON soa.objID = o.objID\n",
-    "        WHERE CONTAINS(POINT('ICRS', RAMean, DecMean),CIRCLE('ICRS',%f,%f,0.25))=1\n",
+    "        WHERE CONTAINS(POINT('ICRS', RAMean, DecMean),CIRCLE('ICRS',%f,%f,%f))=1\n",
     "            AND o.nDetections > 5\n",
     "            AND soa.primaryDetection>0\n",
     "            AND o.gQfPerfect>0.85 and o.rQfPerfect>0.85 and o.iQfPerfect>0.85 and o.zQfPerfect>0.85\n",
     "            AND (o.rmeanpsfmag - o.rmeankronmag < 0.05)\n",
-    "        \"\"\" % (ra_cen, dec_cen)\n",
+    "        \"\"\" % (ra_cen, dec_cen, radius)\n",
     "\n",
     "result = ps1dr2_tap.run_sync(query)\n",
     "df_ps1 = result.to_table().to_pandas()\n",
@@ -1609,6 +1609,14 @@
    "source": [
     "> **Figure 13:** Magnitude differences between LSSTComCam $g$-band and Gaia DR3 $BP$-band photometry for matched stars plotted as a function of $(g-i)$ color. Orange points show the difference between DP1 $g$ magnitudes and Gaia $BP$ magnitudes before applying the transformation, demonstrating a large offset in $\\Delta$mag that increases toward redder $(g-i)$ colors. Blue stars are the results after applying the polynomial transformation. Pink open squares show the residuals after transforming using the lookup table, demonstrating smaller residuals than the polynomial results."
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0db669c8-3460-43b6-a172-09723eee01a3",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {