ASTROSAT CZTI

Data Quality Report

Orbit 20451

Creation date: 2024-06-27T18:15:32.417669
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A05_160T02_9000003022_20451cztM0_level2.evt modeM0/AS1A05_160T02_9000003022_20451cztM0_level2_quad_clean.evt
Size (bytes)1,176,615,360203,477,760
Size1.1 GB 194.1 MB
Events in quadrant A7,795,3741,305,024
Events in quadrant B8,380,5941,335,220
Events in quadrant C8,101,8451,253,620
Events in quadrant D10,299,0281,188,895

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03180
B03180
C03180
D03180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0334412
B0348872
C0340142
D0413032

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A156541380.881564%
B156541571.002939%
C156541851.181807%
D156555523.526030%

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 19275 15655 24 24 0.12% 0.15%
B 19275 15655 14 14 0.07% 0.09%
C 19275 15655 10 10 0.05% 0.06%
D 19276 15656 449 449 2.33% 2.87%

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 15 222 123622 311.82 1943 1903 390.4
A 5 16 98804 248.24 1943 1903 390.4
A 12 16 56575 140.06 1943 1903 390.4
B 0 189 295891 806.29 1958 1914 364.6
B 7 220 71192 190.01 1958 1914 364.6
B 0 198 62397 165.89 1958 1914 364.6
C 14 238 293575 672.32 1870 1885 433.9
C 9 221 261714 598.89 1870 1885 433.9
C 3 233 239264 547.14 1870 1885 433.9
D 12 218 963517 2139.94 1857 1806 449.4
D 15 0 621371 1378.62 1857 1806 449.4
D 1 52 574824 1275.05 1857 1806 449.4

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