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--- projects:kids:atlas [2015/04/14 14:53]
emhelmich
+++ projects:kids:atlas [2016/06/17 14:37] (current)
gverdoes
@@ Line 7: / Line 7: @@
 == Status (last update 14 Apr 2015)
+See [[https://docs.google.com/presentation/d/1_LWxm17k6fAFb2w3nbjMmksYNXCNXp3Ed-yVlmD3cF8/edit?usp=sharing | ATLAS slides]]
 We are producing u,g,r,i (not z!) ATLAS coadds re-using/adapting the KiDS pipeline.
+== Gaps in coadded data
+Gaps between CCDs; in the release notes of ATLAS {{:projects:kids:atlas_dr1.pdf|}}: is written that in data observed before November 2011 the vertical gaps between the CCDs are not always filled in well because of the way the observations were executed. I suppose this is what you are seeing.
+== South-West secondary star diagnosis
+Matt Owers notes:
+- The issue I noted earlier with the small secondary star ~2" to the
+southwest of brighter stars only appears in one g-band image. It is odd
+that the secondary star is not the same brightness as the standard and I
+can't really think what might cause this.
+[[http://quality.astro-wise.org/QualityWISE?object_str=CoaddedRegriddedFrame&object_id=1360ba421d1f42f1e053c016a9c3851e&project=ATLAS | example case, g-band ATLAS data with  rawfitsdata with DATE-OBS=set([datetime.datetime(2011, 9, 25, 1, 9, 10), datetime.datetime(2011, 9, 25, 1, 7, 35)])
+]]:
+**Diagnosis**: poor image quality in raw science exposures. 3 Figures below show a zoom in on an area in the example case:
+{{:projects:kids:coaddatlas.png?800|Coadded calibrated image}}
+{{:projects:kids:rawfits1.png?800|RawFitsData exposure 1}}
+{{:projects:kids:rawfits2.png?800|RawFitsData, exposure 2}}
+The RawFitsData with the "secondary star" has DATE-OBS=2011-09-25T01:09:10.066.
+**DETECTION**: most direct on RawScience. Probably using PSF anisotropy (high ellipticity with fixed PA) information. In absence of PSF anisotropy information of RawScienceFrames on can look at it for a [[http://quality.astro-wise.org/QualityWISE?object_str=ReducedScienceFrame&object_id=12D50F3E66484BB3E053C016A9C3FF8A&project=ATLAS&progenitors=1#progenitors | ReducedScienceFrame with
+DATE-OBS=2011-09-25T01:09:10.066]].
+{{http://ds.astro.rug.astro-wise.org:8000/QC-JMCFARLAND-OMEGACAM-------OCAM_g_SDSS-ESO_CCD_%2396---PSF_Anisotropy-ReducedScienceFrame-57115.6735075-04b68968a6ed53483c0909d1c30538bcb0d3753e.png?800}}
+**ASTROMETRY NOTE**: this appears as one reason for bad astrometric residuals. See the correlated global astrometric parameters in the [[http://quality.astro-wise.org/QualityWISE?object_str=CoaddedRegriddedFrame&object_id=1360ba421d1f42f1e053c016a9c3851e&project=ATLAS | example case, g-band ATLAS data with  rawfitsdata with DATE-OBS=set([datetime.datetime(2011, 9, 25, 1, 9, 10), datetime.datetime(2011, 9, 25, 1, 7, 35)])]].
 == ATLAS tiles mapping onto Astro-WISE classes
+(work in progress by Gijs)
+Goal: define units of data for ATLAS in the same way as for KiDS. This ensures that whatever script/approach we develop that works on one will work for the other.
 First the ATLAS observing strategy:
@@ Line 20: / Line 57: @@
 * Observations before 2011-10-31: more a mess. We are considering to clean it by creating manually same mapping as >2011-10-31
+KiDS survey operations handle on units of data:
+   * survey tile: data from all bands with a tile as defined by the survey. Example is the handling of multi-band productions (mult-band catalogs) and analysis (stellar locus, QSO/galaxy selection in color-color space)
+   * ObservingBlock: all exposures that go into data from a single band. Example is the creation of coadded images and source extraction of those.
+   * Template?
+   * Exposure: a single exposure.
+For KiDS the mapping from survey tile to observing blocks to templates and exposures is straightforward:
+   * survey tile->observing blocks: the tilename can be inferred from the observingblock name
+   * observingblock->exposures: all exposures have as observingblock dependency the observing block. NB: there exist no additional exposures with that observingblock as dependency.
+For ATLAS>2011-10-31
+   * survey tile -> observing blocks: the tilename can be inferred from the observingblock name
+   * observingblock->exposures: all exposures have as observingblock dependency the observing block. NB: there exist no additional exposures with that observingblock as dependency.
 == Validation set: tile overlapping with SDSS
@@ Line 116: / Line 166: @@
 == Coadd QC
-Report 2015-04-14: QC of 225 ATLAS coadds in SAMI cluster regions
+Report 2015-04-16: QC of 207 ATLAS coadds in SAMI cluster regions
 ^  QC check  ^  Nr OK  ^  Nr NOK  ^
-| Cross-talk  |  225  |  0  |
+| Cross-talk  |  207  |  0  |
-| Bg subtr.  |  220  |  10  |
+| Bg subtr.  |  206  |  1  |
-| Calibrations  |  221  |  9  |
+| Calibrations  |  207  |  0  |
-| Astrom  |  181  |  49  |
+| Astrom  |  162  |  45  |
-| Photom  |  230  |  0  |
+| Photom  |  207  |  0  |
-| PSF difference  |  216  |  14  |
+| PSF difference  |  196  |  11  |
-^ Overal verdict  ^  151  ^  74  ^
+^ Overal verdict  ^  156  ^  51  ^
-pointings have multiple coadds:
-x 2 coadds
-x 3 coadds
-x 4 coadds
-x 6 coadds
 **Astrometry statistics**
@@ Line 138: / Line 182: @@
 Data points: blue = u; green = g; red = r; magenta = i
-Dashed lines: QC limits used for KiDS coadds
+Dashed lines: QC limits adopted in qcCoadd_ATLAS.py
 **PSF sizes and size variations**
@@ Line 150: / Line 194: @@
 [[http://dbview.astro-wise.org/DbView?project=ATLAS&set_cookie=&QSort=&QDesc=descending&2ndQSort=&2ndQDesc=descending&numrows=rownum&fcontext_project_only=on&show_expanded=no&Exportselect=NoDownload&class_str=CoaddedRegriddedFrame&mode=table_res&depth=1&python_dict=%2528dp0%250AS%2527query%2527%250Ap1%250A%2528dp2%250AsS%2527expanded%2527%250Ap3%250A%2528dp4%250AS%2527CoaddedRegriddedFrame%2527%250Ap5%250A%2528lp6%250AS%2527open%2527%250Ap7%250AaS%2527root%2527%250Ap8%250Aag5%250AasS%2527CoaddedRegriddedFrame.instrument%2527%250Ap9%250A%2528lp10%250AS%2527prefilled%2527%250Ap11%250AaS%2527link_property%2527%250Ap12%250AaS%2527Instrument%2527%250Ap13%250AasS%2527CoaddedRegriddedFrame.filter%2527%250Ap14%250A%2528lp15%250Ag11%250AaS%2527link_property%2527%250Ap16%250AaS%2527Filter%2527%250Ap17%250AassS%2527derived%2527%250Ap18%250A%2528dp19%250As.&expanded_leaf=&expanded_leaf_type=&expanded_leaf_class=&derived_leaf=&node_state=&CoaddedRegriddedFrame.expanded=open&CoaddedRegriddedFrame.instrument.expanded=prefilled&CoaddedRegriddedFrame.filter.expanded=prefilled&CoaddedRegriddedFrame.is_valid.op=%3E&CoaddedRegriddedFrame.is_valid=0&CoaddedRegriddedFrame.instrument.name=OMEGACAM&CoaddedRegriddedFrame.instrument.name.op=%3D&CoaddedRegriddedFrame.regridded_frames.base=RegriddedFrame | coadds]]
+{{:projects:kids:atlascoaddsinkids.png?200|}}
 == VST-ATLAS pipeline description

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