Changes between Version 7 and Version 8 of QUB_SV_21012010_templates

Timestamp:

Jan 21, 2010, 10:10:09 AM (16 years ago)

Author:

kpat.uk

Comment:

--

QUB_SV_21012010_templates

@@ -4 +4 @@
 '''STEP 1'''[[BR]]
 
-
 '''Stack for testing on skycell with good target already selected ''' [[BR]]
+Before produce all the difference stack-stack it would be probably useful to test the ppsub on a small number of stacks.
+On MD03 skycel 043 the Harvard/JHU PS1 Group found some SN candidates. Using good images for this skycel, we could test 
+ppsub and the photometry of psphot. 
 
 '''MD03''' [[BR]]
@@ -13 +15 @@
 '''r skycell.043 stack.39693'''[[BR]]
 
-'''i skycell.043 stack.'''[[BR]]
+'''i skycell.043 stack.36944'''[[BR]]
 
-
+'''z skycell.043 stack.'''[[BR]]
 
 '''STEP 2'''[[BR]]
 
 I'm selecting good stacks looking the following 4 parameters in the unconvolved stacks:
-average fhwm Minimum;   average fhwm Major;   average moment along xx;  average momentum along yy
+average fhwm Minimum;   average fhwm Major;   average moment along xx;  average momentum along yy.[[BR]]
+
 Once a good night is selected in each filter, I checked 3-4 skycells by eyes and run ppSub using these images as template.
-The good stacks I suggest as teplate are reported below, followed by a summary of all the steps I did.[[BR]]
+(any suggestion how to improve the selection of the templates is welcomed). [[BR]]
+
+
+Here are all the steps I'm doing:  [[BR]]
+
+* Download all new stacks in the archive[[BR]]
+
+* Run psphot on unconvolved images [[BR]]
+
+* Compare the following parameters from cmf files: [[BR]]
+
+   PSF magnitudes vs aperture magntude [[BR]]
+
+   moment along x vs moment along y [[BR]]
+ 
+   minimum fwhm vs major fwhm [[BR]]
+
+[[Image(MD04.skycell.044.stk.41186.cmf_1.png, 400px)]][[BR]]
+[[Image(MD04.skycell.099.stk.38684.cmf_1.png, 400px)]][[BR]]
+
+ '''COMMENTS:'''
+the unconvolved images have more detections (but probably several of them are not real)
+the FWHM of the objects is degraded in the convolved image (probably too much in some skycells)
+To investigate the quality of stacks and select good templates, I used the fwhm and moments values of the unconvnolved images.[[BR]]
+
+The choice of the unconvolved images to investigate the fwhm and moment variation is because in the convolved images the fwhm and moments are all degraded at similar values. 
+ 
+ The average values for each skycell is computed rejecting at 3 sigma (5 iterations) [[BR]]
+
+* I'm comparing the values of these parameters in each filters and each field  [[BR]]
+
+* taking a look by eyes some of the skycells of the best epochs, I choose the best templates  [[BR]]
+
+ some epochs with small fwhm and moments (in principle good templates) seem to be masked too much  [[BR]]
+
+[[Image(MD02.skycell.066.stk.36184.unconv.jpg, 400px)]][[BR]]
+Good nights from which we can probably take the template stacks are reported below: [[BR]]
 
 '''MD02'''[[BR]]
@@ -73 +112 @@
 [[Image(MD04.png, 800px)]][[BR]]
 
-Here is all the step I'm doing what I'm doing:  [[BR]]
 
-* Download all new stacks in the archive[[BR]]
-
-* Run psphot on unconvolved images [[BR]]
-
-* Compare the following parameters from cmf files: [[BR]]
-
-   PSF magnitudes vs aperture magntude [[BR]]
-
-   moment along x vs moment along y [[BR]]
- 
-   minimum fwhm vs major fwhm [[BR]]
-
-[[Image(MD04.skycell.044.stk.41186.cmf_1.png, 400px)]][[BR]]
-[[Image(MD04.skycell.099.stk.38684.cmf_1.png, 400px)]][[BR]]
-
- '''COMMENTS:'''
-
-the unconvolved images have more detections (but probably several of them are not real)
-the FWHM of the objects is degradated in the convolved image (probably too much in some skycells)
-To investigate the quality of stacks and select good templates, I used the fwhm and moments values of the unconvnolved images.
-
-
-
- The average values for each skycell is computed rejecting at 3 sigma (5 iterations) [[BR]]
-
-* I'm comparing the values of these parameters in each filters and each field  [[BR]]
-
-* taking a look by eyes some of the skycells of the best epochs, I choose the best templates  [[BR]]
-
- some epochs with small fwhm and moments (in principle good templates) seem to be masked too much  [[BR]]
-
-[[Image(MD02.skycell.066.stk.36184.unconv.jpg, 400px)]][[BR]]
 
 * Finally, I'm testing ppSub with the templates selected [[BR]]