ASTROSAT CZTI

Data Quality Report

Orbit 20201019_A09_038T11_9000003924_level2

Creation date: 2025-12-16T14:58:13.815503
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/AS1A09_038T11_9000003924cztM0_level2.fits modeM0/AS1A09_038T11_9000003924cztM0_level2_quad_clean.evt
Size (bytes)71,418,24042,563,520
Size68.1 MB 40.6 MB
Events in quadrant A477,142233,928
Events in quadrant B455,078234,049
Events in quadrant C361,516157,265
Events in quadrant D385,312179,865

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146540
B0147770
C0277790
D0247170

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6932530.764570%
B6932520.750144%
C6932207429.919215%
D6932100614.512406%

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 8102 6931 0 0 0.00% 0.00%
B 8102 6931 0 0 0.00% 0.00%
C 8101 6428 0 0 0.00% 0.00%
D 8102 6932 0 0 0.00% 0.00%

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 29 426 9.72 124 118 31.7
A 7 110 386 8.46 124 118 31.7
A 9 19 360 7.64 124 118 31.7
B 2 9 342 8.75 120 116 25.8
B 5 232 315 7.7 120 116 25.8
B 12 226 293 6.85 120 116 25.8
C 3 202 298 7.98 95 90 26.0
C 1 81 280 7.29 95 90 26.0
C 3 203 269 6.87 95 90 26.0
D 6 38 280 5.92 110 100 30.4
D 6 62 279 5.89 110 100 30.4
D 10 189 278 5.86 110 100 30.4

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