ASTROSAT CZTI

Data Quality Report

Orbit 18657

Creation date: 2024-06-27T17:53:02.021777
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/AS1A06_003T01_9000002786_18657cztM0_level2.evt modeM0/AS1A06_003T01_9000002786_18657cztM0_level2_quad_clean.evt
Size (bytes)684,950,40090,846,720
Size653.2 MB 86.6 MB
Events in quadrant A3,452,389628,847
Events in quadrant B3,402,985638,559
Events in quadrant C3,747,497618,836
Events in quadrant D9,728,462438,126

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143452
B0141742
C0151682
D0332392

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6106941.539469%
B61061081.768752%
C61061732.833279%
D6106255541.844088%

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 7441 6106 1 1 0.01% 0.02%
B 7441 6106 2 2 0.03% 0.03%
C 7441 6106 2 2 0.03% 0.03%
D 7441 6106 2338 2338 31.42% 38.29%

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 84249 489.68 854 838 170.3
A 6 16 63016 365.03 854 838 170.3
A 15 192 16158 89.94 854 838 170.3
B 4 216 61854 387.8 846 828 157.4
B 3 64 22116 135.28 846 828 157.4
B 12 111 18136 109.99 846 828 157.4
C 3 233 285863 1489.87 829 837 191.3
C 14 238 128342 666.49 829 837 191.3
C 9 221 101164 524.42 829 837 191.3
D 7 238 6455722 38655.17 693 674 167.0
D 13 168 481036 2876.58 693 674 167.0
D 1 52 145230 865.65 693 674 167.0

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