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Fix PS1 search radius in NB 309_2 #132

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jeffcarlin merged 1 commit into from
Mar 26, 2026
Merged

Fix PS1 search radius in NB 309_2 #132

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22 changes: 15 additions & 7 deletions ...0_Science_Demos/309_Astronomical_analysis/309_2_convert_between_photometric_systems.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -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._"
]
},
{
Expand All @@ -145,7 +145,7 @@
"source": [
"ra_cen = 53.2\n",
"dec_cen = -28.1\n",
"radius = 0.25"
"radius = 0.24"
]
},
{
Expand Down Expand Up @@ -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."
]
},
{
Expand Down Expand Up @@ -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."
]
},
{
Expand Down Expand Up @@ -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",
Expand Down Expand Up @@ -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": {
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