ASTROSAT CZTI

Data Quality Report

Orbit 20200623_A09_081T01_9000003730_level2

Creation date: 2025-12-12T23:31:18.129795
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_081T01_9000003730cztM0_level2.fits modeM0/AS1A09_081T01_9000003730cztM0_level2_quad_clean.evt
Size (bytes)311,037,120208,247,040
Size296.6 MB 198.6 MB
Events in quadrant A1,914,8161,079,165
Events in quadrant B1,861,4121,095,893
Events in quadrant C1,867,0501,032,999
Events in quadrant D1,625,104944,554

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0630
B0630
C0630
D0630

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0721100
B0660780
C0649270
D0747320

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06360
B06360
C06360
D06360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A313225351.708065%
B313221840.587447%
C313223010.960986%
D313224011.280250%

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 37472 31314 0 0 0.00% 0.00%
B 37472 31322 0 0 0.00% 0.00%
C 37472 31322 0 0 0.00% 0.00%
D 37472 31322 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 1658 9.64 499 469 123.4
A 7 110 1541 8.69 499 469 123.4
A 9 19 1499 8.35 499 469 123.4
B 2 9 1498 10.64 493 472 96.5
B 5 128 1270 8.27 493 472 96.5
B 2 8 1225 7.81 493 472 96.5
C 9 233 1266 6.4 493 463 125.6
C 3 126 1259 6.34 493 463 125.6
C 12 250 1241 6.2 493 463 125.6
D 3 14 1232 6.49 463 422 124.8
D 15 46 1168 5.98 463 422 124.8
D 6 67 1128 5.66 463 422 124.8

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