ASTROSAT CZTI

Data Quality Report

Orbit 20200917_A09_038T17_9000003884_level2

Creation date: 2021-01-08T06:54:21.453431
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A09_038T17_9000003884cztM0_level2_bc.evt modeM0/AS1A09_038T17_9000003884cztM0_level2_quad_clean.evt
Size (bytes)1,568,511,360625,201,920
Size1.5 GB 596.2 MB
Events in quadrant A10,205,9924,203,712
Events in quadrant B10,412,5254,233,693
Events in quadrant C7,715,9984,267,529
Events in quadrant D16,814,8313,862,281

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08180
B08180
C08180
D08180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0793410
B0836050
C0722240
D01115120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A340935371.575103%
B3409217845.232899%
C340906421.883250%
D34091456013.375964%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 41696 34087 14 14 0.03% 0.04%
B 41696 34085 39 39 0.09% 0.11%
C 41696 34088 1 1 0.00% 0.00%
D 41696 34092 714 714 1.71% 2.09%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 2245661 5414.82 1968 1949 414.4
A 6 16 222307 531.8 1968 1949 414.4
A 5 168 148505 353.69 1968 1949 414.4
B 3 64 1590914 4330.33 1979 1943 366.9
B 10 245 618368 1679.91 1979 1943 366.9
B 0 190 422244 1145.42 1979 1943 366.9
C 15 208 75398 156.94 1985 1989 467.7
C 14 176 18160 34.57 1985 1989 467.7
C 13 61 11177 19.64 1985 1989 467.7
D 1 52 6396929 15303.79 1857 1820 417.9
D 7 80 2159146 5162.58 1857 1820 417.9
D 11 176 619406 1477.91 1857 1820 417.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter