DM-47700: Add first draft of crowded field section

SITCOMTN-149.tex

@@ -2,8 +2,12 @@
 \input{meta}
 
 % Package imports go here.
+\usepackage{xspace}
 
 % Local commands go here.
+\newcommand{\ComCam}{ComCam\xspace}
+\setlength{\headheight}{62pt}           % heed warnings that these values need adjusting
+\addtolength{\topmargin}{-7pt}
 
 %If you want glossaries
 %\input{aglossary.tex}

acronyms.tex

@@ -3,15 +3,20 @@
 \textbf{Acronym} & \textbf{Description}  \\\hline
 
 2D & Two-dimensional \\\hline
+3D & Three-dimensional \\\hline
 ADU & Analogue-to-Digital Unit \\\hline
+AI & Artificial Intelligence \\\hline
 AOS & Active Optics System \\\hline
 CBP & Collimated Beam Projector \\\hline
+CCD & Charge-Coupled Device \\\hline
 CNN & Convolutional Neural Network \\\hline
 COSMOS & Cosmic Evolution Survey \\\hline
 DC2 & Data Challenge 2 (DESC) \\\hline
+DE & dark energy \\\hline
 DECaLS & The Dark Energy Camera Legacy Survey \\\hline
 DECam & Dark Energy Camera \\\hline
 DES & Dark Energy Survey \\\hline
+DESC & Dark Energy Science Collaboration \\\hline
 DIA & Difference Image Analysis \\\hline
 DIMM & Differential Image Motion Monitor \\\hline
 DM & Data Management \\\hline
@@ -20,8 +25,11 @@
 DRP & Data Release Production \\\hline
 EDFS & Euclid Deep Field South \\\hline
 FGCM & Forward Global Calibration Model \\\hline
+FOV & field of view \\\hline
+FRACAS & Failure Reporting Analysis and Corrective Action System \\\hline
 FWHM & Full Width at Half-Maximum \\\hline
 GBDES & Gary Bernstein Dark Energy Survey \\\hline
+HIPS & Hierarchical Progressive Survey (IVOA standard) \\\hline
 HSC & Hyper Suprime-Cam \\\hline
 HST & Hubble Space Telescope \\\hline
 ISR & Instrument Signal Removal \\\hline
@@ -31,6 +39,8 @@
 LSB & Low Surface Brightness \\\hline
 LSST & Legacy Survey of Space and Time (formerly Large Synoptic Survey Telescope) \\\hline
 LUT & Look-Up Table \\\hline
+LVV & LSST Verification and Validation \\\hline
+M1M3 & Primary Mirror Tertiary Mirror \\\hline
 M2 & Secondary Mirror \\\hline
 ML & Machine Learning \\\hline
 MODTRAN & MODerate resolution TRANsmission model \\\hline
@@ -44,10 +54,13 @@
 SDSS & Sloan Digital Sky Survey \\\hline
 SE & System Engineering \\\hline
 SED & Spectral Energy Distribution \\\hline
+SITCOM & System Integration, Test and Commissioning \\\hline
+SLAC & SLAC National Accelerator Laboratory \\\hline
 SOAR & Southern Astrophysical Research Telescope \\\hline
 SSI & Synthetic Source Injection \\\hline
 SSP & Solar System Processing \\\hline
 TBC & To Be Confirmed \\\hline
 TMA & Telescope Mount Assembly \\\hline
+UA & University of Arizona \\\hline
 ZTF & Zwicky Transient Facility \\\hline
 \end{longtable}

crowded_stellar_fields.tex

@@ -1,2 +1,36 @@
 \section{Crowded Stellar Fields}
-\label{sec:crowded_stellar_fields}
+\label{sec:crowded_stellar_fields}
+
+\subsection{Observations taken to date}
+Five visits of the globular cluster 47 Tuc were taken during AOS testing:
+\begin{itemize}
+    \item \href{https://usdf-rsp.slac.stanford.edu/rubintv/summit-usdf/comcam/event?key=comcam/2024-11-16/focal_plane_mosaic/000136/comcam_focal_plane_mosaic_2024-11-16_000136.jpg}{2024111600136}
+    \item \href{https://usdf-rsp.slac.stanford.edu/rubintv/summit-usdf/comcam/event?key=comcam/2024-11-16/focal_plane_mosaic/000139/comcam_focal_plane_mosaic_2024-11-16_000139.jpg}{2024111600139}
+    \item \href{https://usdf-rsp.slac.stanford.edu/rubintv/summit-usdf/comcam/event?key=comcam/2024-11-16/focal_plane_mosaic/000142/comcam_focal_plane_mosaic_2024-11-16_000142.jpg}{2024111600142}
+    \item \href{https://usdf-rsp.slac.stanford.edu/rubintv/summit-usdf/comcam/event?key=comcam/2024-11-16/focal_plane_mosaic/000145/comcam_focal_plane_mosaic_2024-11-16_000145.jpg}{2024111600145}
+    \item \href{https://usdf-rsp.slac.stanford.edu/rubintv/summit-usdf/comcam/event?key=comcam/2024-11-16/focal_plane_mosaic/000148/comcam_focal_plane_mosaic_2024-11-16_000148.jpg}{2024111600148}
+\end{itemize}
+Links are to focal plane images of each visit.
+
+This field is a good target for testing the crowded field pipeline, though these observations do not have a sufficiently good PSF for analysis. Zoomed in, the PSF of the stars in the cluster are a variety of \href 
+{https://files.slack.com/files-pri/T02SVMGU4-F082HCQ499P/image.png}{out-of-focus donuts}.
+
+Deblending failed on these images, and we are waiting on new data under better conditions to test deblending and image differencing.
+
+Other fields observed so far have not exceeded \( 25\,000 \) sources per square degree, which is insufficient for testing the crowded field pipelines.
+
+\subsection{Commissioning data needed}
+The ideal test data would be observations with densities in the \( 75\,000 - 100\,000 \) sources per square degree range. Several fields have been proposed:
+\begin{enumerate}
+\item \textbf{Extragalactic Deep Field:} Extended Chandra Deep Field-South @ (ra, dec) = (53.125, -28.1)
+\item \textbf{Extragalactic Deep Field:} Euclid Deep Field South @ (ra, dec) = (59.1004, -48.73)
+\item \textbf{Ecliptic Field:} Rubin\_SV\_38\_7 @ (ra, dec) = (37.9, 7.0)
+\item \textbf{High Stellar Density:} Fornax Dwarf Spheroidal Galaxy @ (ra, dec) = (40.00, -34.45)
+\item \textbf{High Stellar Density:} Rubin\_SV\_095\_-25 @ (ra, dec) = (95.0, -25.0)
+\end{enumerate}
+
+\subsection{Development work needed}
+While difference images can usually rely on having isolated diaSources, we expect to have many blended footprints in sufficiently crowded fields. 
+
+We have implemented deblending of blends of purely positive or purely negative peaks (\href{https://rubinobs.atlassian.net/browse/DM-44319}{DM-44319}), but blends of mixed peaks require new development.
+This work is ticketed on \href{https://rubinobs.atlassian.net/browse/DM-44416}{DM-44416}, but not yet started or planned.