Added more to the statement of need.

Signed-off-by: David Turner <turne540@msu.edu>

paper/paper.bib

@@ -1,126 +1,3 @@
-@ARTICLE{xcsmethod,
-       author = {{Lloyd-Davies}, E.~J. and {Romer}, A. Kathy and {Mehrtens}, Nicola and
-         {Hosmer}, Mark and {Davidson}, Michael and {Sabirli}, Kivanc and
-         {Mann}, Robert G. and {Hilton}, Matt and {Liddle}, Andrew R. and
-         {Viana}, Pedro T.~P. and {Campbell}, Heather C. and
-         {Collins}, Chris A. and {Dubois}, E. Naomi and {Freeman}, Peter and
-         {Harrison}, Craig D. and {Hoyle}, Ben and {Kay}, Scott T. and
-         {Kuwertz}, Emma and {Miller}, Christopher J. and {Nichol}, Robert C. and
-         {Sahl{\'e}n}, Martin and {Stanford}, S.~A. and {Stott}, John P.},
-        title = "{The XMM Cluster Survey: X-ray analysis methodology}",
-      journal = {\mnras},
-     keywords = {surveys, galaxies: clusters: intracluster medium, cosmology: observations, X-rays: galaxies: clusters, Astrophysics - Cosmology and Nongalactic Astrophysics},
-         year = 2011,
-        month = nov,
-       volume = {418},
-       number = {1},
-        pages = {14-53},
-          doi = {10.1111/j.1365-2966.2011.19117.x},
-archivePrefix = {arXiv},
-       eprint = {1010.0677},
- primaryClass = {astro-ph.CO},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2011MNRAS.418...14L},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
-@ARTICLE{xcsfoundation,
-       author = {{Romer}, A. Kathy and {Viana}, Pedro T.~P. and {Liddle}, Andrew R. and {Mann}, Robert G.},
-        title = "{A Serendipitous Galaxy Cluster Survey with XMM: Expected Catalog Properties and Scientific Applications}",
-      journal = {\apj},
-     keywords = {Cosmology: Miscellaneous, Galaxies: Clusters: General, X-Rays: Galaxies},
-         year = 2001,
-        month = feb,
-       volume = {547},
-       number = {2},
-        pages = {594-608},
-          doi = {10.1086/318382},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2001ApJ...547..594R},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
-@ARTICLE{matcha,
-       author = {{Hollowood}, Devon L. and {Jeltema}, Tesla and {Chen}, Xinyi and {Farahi}, Arya and {Evrard}, August and {Everett}, Spencer and {Rozo}, Eduardo and {Rykoff}, Eli and {Bernstein}, Rebecca and {Bermeo-Hernandez}, Alberto and {Eiger}, Lena and {Giles}, Paul and {Israel}, Holger and {Michel}, Renee and {Noorali}, Raziq and {Romer}, A. Kathy and {Rooney}, Philip and {Splettstoesser}, Megan},
-        title = "{Chandra Follow-up of the SDSS DR8 Redmapper Catalog Using the MATCha Pipeline}",
-      journal = {\apjs},
-     keywords = {cosmology: observations, dark energy, galaxies: clusters: general, X-rays: galaxies: clusters, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena},
-         year = 2019,
-        month = oct,
-       volume = {244},
-       number = {2},
-          eid = {22},
-        pages = {22},
-          doi = {10.3847/1538-4365/ab3d27},
-archivePrefix = {arXiv},
-       eprint = {1808.06637},
- primaryClass = {astro-ph.CO},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2019ApJS..244...22H},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
-@ARTICLE{xrism,
-       author = {{XRISM Science Team}},
-        title = "{Science with the X-ray Imaging and Spectroscopy Mission (XRISM)}",
-      journal = {arXiv e-prints},
-     keywords = {Astrophysics - High Energy Astrophysical Phenomena},
-         year = 2020,
-        month = mar,
-          eid = {arXiv:2003.04962},
-        pages = {arXiv:2003.04962},
-archivePrefix = {arXiv},
-       eprint = {2003.04962},
- primaryClass = {astro-ph.HE},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2020arXiv200304962X},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
-@ARTICLE{athena,
-       author = {{Nandra}, Kirpal and {Barret}, Didier and {Barcons}, Xavier and {Fabian}, Andy and {den Herder}, Jan-Willem and {Piro}, Luigi and {Watson}, Mike and {Adami}, Christophe and {Aird}, James and {Afonso}, Jose Manuel and {Alexander}, Dave and {Argiroffi}, Costanza and {Amati}, Lorenzo and {Arnaud}, Monique and {Atteia}, Jean-Luc and {Audard}, Marc and {Badenes}, Carles and {Ballet}, Jean and {Ballo}, Lucia and {Bamba}, Aya and {Bhardwaj}, Anil and {Stefano Battistelli}, Elia and {Becker}, Werner and {De Becker}, Micha{\"e}l and {Behar}, Ehud and {Bianchi}, Stefano and {Biffi}, Veronica and {B{\^\i}rzan}, Laura and {Bocchino}, Fabrizio and {Bogdanov}, Slavko and {Boirin}, Laurence and {Boller}, Thomas and {Borgani}, Stefano and {Borm}, Katharina and {Bouch{\'e}}, Nicolas and {Bourdin}, Herv{\'e} and {Bower}, Richard and {Braito}, Valentina and {Branchini}, Enzo and {Branduardi-Raymont}, Graziella and {Bregman}, Joel and {Brenneman}, Laura and {Brightman}, Murray and {Br{\"u}ggen}, Marcus and {Buchner}, Johannes and {Bulbul}, Esra and {Brusa}, Marcella and {Bursa}, Michal and {Caccianiga}, Alessandro and {Cackett}, Ed and {Campana}, Sergio and {Cappelluti}, Nico and {Cappi}, Massimo and {Carrera}, Francisco and {Ceballos}, Maite and {Christensen}, Finn and {Chu}, You-Hua and {Churazov}, Eugene and {Clerc}, Nicolas and {Corbel}, Stephane and {Corral}, Amalia and {Comastri}, Andrea and {Costantini}, Elisa and {Croston}, Judith and {Dadina}, Mauro and {D'Ai}, Antonino and {Decourchelle}, Anne and {Della Ceca}, Roberto and {Dennerl}, Konrad and {Dolag}, Klaus and {Done}, Chris and {Dovciak}, Michal and {Drake}, Jeremy and {Eckert}, Dominique and {Edge}, Alastair and {Ettori}, Stefano and {Ezoe}, Yuichiro and {Feigelson}, Eric and {Fender}, Rob and {Feruglio}, Chiara and {Finoguenov}, Alexis and {Fiore}, Fabrizio and {Galeazzi}, Massimiliano and {Gallagher}, Sarah and {Gandhi}, Poshak and {Gaspari}, Massimo and {Gastaldello}, Fabio and {Georgakakis}, Antonis and {Georgantopoulos}, Ioannis and {Gilfanov}, Marat and {Gitti}, Myriam and {Gladstone}, Randy and {Goosmann}, Rene and {Gosset}, Eric and {Grosso}, Nicolas and {Guedel}, Manuel and {Guerrero}, Martin and {Haberl}, Frank and {Hardcastle}, Martin and {Heinz}, Sebastian and {Alonso Herrero}, Almudena and {Herv{\'e}}, Anthony and {Holmstrom}, Mats and {Iwasawa}, Kazushi and {Jonker}, Peter and {Kaastra}, Jelle and {Kara}, Erin and {Karas}, Vladimir and {Kastner}, Joel and {King}, Andrew and {Kosenko}, Daria and {Koutroumpa}, Dimita and {Kraft}, Ralph and {Kreykenbohm}, Ingo and {Lallement}, Rosine and {Lanzuisi}, Giorgio and {Lee}, J. and {Lemoine-Goumard}, Marianne and {Lobban}, Andrew and {Lodato}, Giuseppe and {Lovisari}, Lorenzo and {Lotti}, Simone and {McCharthy}, Ian and {McNamara}, Brian and {Maggio}, Antonio and {Maiolino}, Roberto and {De Marco}, Barbara and {de Martino}, Domitilla and {Mateos}, Silvia and {Matt}, Giorgio and {Maughan}, Ben and {Mazzotta}, Pasquale and {Mendez}, Mariano and {Merloni}, Andrea and {Micela}, Giuseppina and {Miceli}, Marco and {Mignani}, Robert and {Miller}, Jon and {Miniutti}, Giovanni and {Molendi}, Silvano and {Montez}, Rodolfo and {Moretti}, Alberto and {Motch}, Christian and {Naz{\'e}}, Ya{\"e}l and {Nevalainen}, Jukka and {Nicastro}, Fabrizio and {Nulsen}, Paul and {Ohashi}, Takaya and {O'Brien}, Paul and {Osborne}, Julian and {Oskinova}, Lida and {Pacaud}, Florian and {Paerels}, Frederik and {Page}, Mat and {Papadakis}, Iossif and {Pareschi}, Giovanni and {Petre}, Robert and {Petrucci}, Pierre-Olivier and {Piconcelli}, Enrico and {Pillitteri}, Ignazio and {Pinto}, C. and {de Plaa}, Jelle and {Pointecouteau}, Etienne and {Ponman}, Trevor and {Ponti}, Gabriele and {Porquet}, Delphine and {Pounds}, Ken and {Pratt}, Gabriel and {Predehl}, Peter and {Proga}, Daniel and {Psaltis}, Dimitrios and {Rafferty}, David and {Ramos-Ceja}, Miriam and {Ranalli}, Piero and {Rasia}, Elena and {Rau}, Arne and {Rauw}, Gregor and {Rea}, Nanda and {Read}, Andy and {Reeves}, James and {Reiprich}, Thomas and {Renaud}, Matthieu and {Reynolds}, Chris and {Risaliti}, Guido and {Rodriguez}, Jerome and {Rodriguez Hidalgo}, Paola and {Roncarelli}, Mauro and {Rosario}, David and {Rossetti}, Mariachiara and {Rozanska}, Agata and {Rovilos}, Emmanouil and {Salvaterra}, Ruben and {Salvato}, Mara and {Di Salvo}, Tiziana and {Sanders}, Jeremy and {Sanz-Forcada}, Jorge and {Schawinski}, Kevin and {Schaye}, Joop and {Schwope}, Axel and {Sciortino}, Salvatore and {Severgnini}, Paola and {Shankar}, Francesco and {Sijacki}, Debora and {Sim}, Stuart and {Schmid}, Christian and {Smith}, Randall and {Steiner}, Andrew and {Stelzer}, Beate and {Stewart}, Gordon and {Strohmayer}, Tod and {Str{\"u}der}, Lothar and {Sun}, Ming and {Takei}, Yoh and {Tatischeff}, V. and {Tiengo}, Andreas and {Tombesi}, Francesco and {Trinchieri}, Ginevra and {Tsuru}, T.~G. and {Ud-Doula}, Asif and {Ursino}, Eugenio and {Valencic}, Lynne and {Vanzella}, Eros and {Vaughan}, Simon and {Vignali}, Cristian and {Vink}, Jacco and {Vito}, Fabio and {Volonteri}, Marta and {Wang}, Daniel and {Webb}, Natalie and {Willingale}, Richard and {Wilms}, Joern and {Wise}, Michael and {Worrall}, Diana and {Young}, Andrew and {Zampieri}, Luca and {In't Zand}, Jean and {Zane}, Silvia and {Zezas}, Andreas and {Zhang}, Yuying and {Zhuravleva}, Irina},
-        title = "{The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission}",
-      journal = {arXiv e-prints},
-     keywords = {Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Solar and Stellar Astrophysics},
-         year = 2013,
-        month = jun,
-          eid = {arXiv:1306.2307},
-        pages = {arXiv:1306.2307},
-archivePrefix = {arXiv},
-       eprint = {1306.2307},
- primaryClass = {astro-ph.HE},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2013arXiv1306.2307N},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
-@ARTICLE{lynx,
-       author = {{Gaskin}, Jessica A. and {Swartz}, Douglas A. and {Vikhlinin}, Alexey and {{\"O}zel}, Feryal and {Gelmis}, Karen E. and {Arenberg}, Jonathan W. and {Bandler}, Simon R. and {Bautz}, Mark W. and {Civitani}, Marta M. and {Dominguez}, Alexandra and {Eckart}, Megan E. and {Falcone}, Abraham D. and {Figueroa-Feliciano}, Enectali and {Freeman}, Mark D. and {G{\"u}nther}, Hans M. and {Havey}, Keith A. and {Heilmann}, Ralf K. and {Kilaru}, Kiranmayee and {Kraft}, Ralph P. and {McCarley}, Kevin S. and {McEntaffer}, Randall L. and {Pareschi}, Giovanni and {Purcell}, William and {Reid}, Paul B. and {Schattenburg}, Mark L. and {Schwartz}, Daniel A. and {Schwartz}, Eric D. and {Tananbaum}, Harvey D. and {Tremblay}, Grant R. and {Zhang}, William W. and {Zuhone}, John A.},
-        title = "{Lynx X-Ray Observatory: an overview}",
-      journal = {Journal of Astronomical Telescopes, Instruments, and Systems},
-         year = 2019,
-        month = apr,
-       volume = {5},
-          eid = {021001},
-        pages = {021001},
-          doi = {10.1117/1.JATIS.5.2.021001},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2019JATIS...5b1001G},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
-@ARTICLE{erosita,
-       author = {{Predehl}, P. and {Andritschke}, R. and {Arefiev}, V. and {Babyshkin}, V. and {Batanov}, O. and {Becker}, W. and {B{\"o}hringer}, H. and {Bogomolov}, A. and {Boller}, T. and {Borm}, K. and {Bornemann}, W. and {Br{\"a}uninger}, H. and {Br{\"u}ggen}, M. and {Brunner}, H. and {Brusa}, M. and {Bulbul}, E. and {Buntov}, M. and {Burwitz}, V. and {Burkert}, W. and {Clerc}, N. and {Churazov}, E. and {Coutinho}, D. and {Dauser}, T. and {Dennerl}, K. and {Doroshenko}, V. and {Eder}, J. and {Emberger}, V. and {Eraerds}, T. and {Finoguenov}, A. and {Freyberg}, M. and {Friedrich}, P. and {Friedrich}, S. and {F{\"u}rmetz}, M. and {Georgakakis}, A. and {Gilfanov}, M. and {Granato}, S. and {Grossberger}, C. and {Gueguen}, A. and {Gureev}, P. and {Haberl}, F. and {H{\"a}lker}, O. and {Hartner}, G. and {Hasinger}, G. and {Huber}, H. and {Ji}, L. and {Kienlin}, A. v. and {Kink}, W. and {Korotkov}, F. and {Kreykenbohm}, I. and {Lamer}, G. and {Lomakin}, I. and {Lapshov}, I. and {Liu}, T. and {Maitra}, C. and {Meidinger}, N. and {Menz}, B. and {Merloni}, A. and {Mernik}, T. and {Mican}, B. and {Mohr}, J. and {M{\"u}ller}, S. and {Nandra}, K. and {Nazarov}, V. and {Pacaud}, F. and {Pavlinsky}, M. and {Perinati}, E. and {Pfeffermann}, E. and {Pietschner}, D. and {Ramos-Ceja}, M.~E. and {Rau}, A. and {Reiffers}, J. and {Reiprich}, T.~H. and {Robrade}, J. and {Salvato}, M. and {Sanders}, J. and {Santangelo}, A. and {Sasaki}, M. and {Scheuerle}, H. and {Schmid}, C. and {Schmitt}, J. and {Schwope}, A. and {Shirshakov}, A. and {Steinmetz}, M. and {Stewart}, I. and {Str{\"u}der}, L. and {Sunyaev}, R. and {Tenzer}, C. and {Tiedemann}, L. and {Tr{\"u}mper}, J. and {Voron}, V. and {Weber}, P. and {Wilms}, J. and {Yaroshenko}, V.},
-        title = "{The eROSITA X-ray telescope on SRG}",
-      journal = {\aap},
-     keywords = {space vehicles: instruments, X-rays: general, surveys, dark energy, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics},
-         year = 2021,
-        month = mar,
-       volume = {647},
-          eid = {A1},
-        pages = {A1},
-          doi = {10.1051/0004-6361/202039313},
-archivePrefix = {arXiv},
-       eprint = {2010.03477},
- primaryClass = {astro-ph.HE},
-       adsurl = {https://ui.adsabs.harvard.edu/abs/2021A&A...647A...1P},
-      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
-}
-
 @ARTICLE{xga,
        author = {{Turner}, D.~J. and {Giles}, P.~A. and {Romer}, A.~K. and {Korbina}, V.},
         title = "{XGA: A module for the large-scale scientific exploitation of archival X-ray astronomy data}",

paper/paper.md

@@ -76,13 +76,19 @@ maximise. Our software is particularly powerful in this regard, as it provides a
 different backend software packages, allowing for the easy processing of X-ray data to a scientifically useful 
 state; this is in addition to the ability to download pre-processed data from many of the data archives.
 
-Almost every sub-field of astronomy, astrophysics, and cosmology has 
-benefited significantly from X-ray coverage over the last three decades. The current workhorse X-ray observatories 
-(_XMM_-Newton and _Chandra_; other telescopes are online but are not as generally useful) are ageing however, with 
-_Chandra_ in particular experiencing a decline in low-energy sensitivity that limits possible science cases; these 
-missions cannot last forever. 
+Almost every sub-field of astronomy, astrophysics, and cosmology has benefited significantly from X-ray coverage over 
+the last three decades. The current workhorse X-ray observatories (_XMM_-Newton and _Chandra_; other telescopes are 
+online but are not as generally useful) are ageing however, with _Chandra_ in particular experiencing a decline in 
+low-energy sensitivity that limits possible science cases; these missions cannot last forever. If we are to enter an 
+'X-ray desert', where the astrophysics community has only limited access to new X-ray observations from specialised 
+missions like Swift, NuSTAR, and XRISM, then archival data (and serendipitous studies) take on an even greater value
+than they already hold. [Daxa]{.smallcaps} is part of an ecosystem of open-source software designed around the concept 
+of enabling serendipitous studies of X-ray emitting objects, and can download and prepare X-ray observations for use
+with tools like 'X-ray: Generate and Analyse' ([Xga]{.smallcaps}) [@xga]. X-ray observations are perfectly suited
+for the kind of archival study facilitated by [Daxa]{.smallcaps} and [Xga]{.smallcaps}, as they generally record the
+time, position, and energy of each individual photon impacting the detector; this means that we can create images, 
+lightcurves, and spectra for any object within the field-of-view, even if it was not the target.
 
-Testing [@xga]
 
 [^*]: turne540@msu.edu