ASTROSAT CZTI

Data Quality Report

Orbit 35274

Creation date: 2022-04-07T11:16:30.380798
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/AS1A11_082T01_9000005056_35274cztM0_level2.evt modeM0/AS1A11_082T01_9000005056_35274cztM0_level2_quad_clean.evt
Size (bytes)517,515,84063,731,520
Size493.5 MB 60.8 MB
Events in quadrant A2,359,596411,836
Events in quadrant B6,622,704378,100
Events in quadrant C2,728,760413,800
Events in quadrant D3,632,495384,756

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A099562
B0230561
C0108551
D0139331

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A486140.082288%
B4861155531.989303%
C4861410.843448%
D48612575.286978%

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 6715 4862 0 0 0.00% 0.00%
B 6714 4861 1149 1149 17.11% 23.64%
C 6715 4862 25 25 0.37% 0.51%
D 6715 4862 213 213 3.17% 4.38%

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 10 83 65683 557.97 588 575 116.7
A 13 6 12659 103.56 588 575 116.7
A 13 254 8736 69.94 588 575 116.7
B 5 236 4001875 41477.13 509 496 96.5
B 5 172 580986 6017.19 509 496 96.5
B 4 232 18997 191.78 509 496 96.5
C 0 10 224815 1679.26 579 583 133.5
C 15 214 200935 1500.43 579 583 133.5
C 9 187 21653 157.79 579 583 133.5
D 7 80 659971 4676.79 574 557 141.0
D 2 249 305272 2161.14 574 557 141.0
D 8 195 158870 1122.81 574 557 141.0

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