ASTROSAT CZTI

Data Quality Report

Orbit 20200115_A08_004T03_9000003438_level2

Creation date: 2025-12-08T06:38:42.716638
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/AS1A08_004T03_9000003438cztM0_level2.fits modeM0/AS1A08_004T03_9000003438cztM0_level2_quad_clean.evt
Size (bytes)270,069,120118,753,920
Size257.6 MB 113.3 MB
Events in quadrant A1,736,880519,777
Events in quadrant B1,647,594515,781
Events in quadrant C1,674,800487,803
Events in quadrant D1,382,776334,202

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02310
B02310
C0750
D02340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540090
B0548400
C0566120
D0787270

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05140
B05150
C05100
D05180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A253603261.285489%
B252994651.838017%
C253446272.473958%
D2494523709.500902%

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 153425 25747 0 0 0.00% 0.00%
B 153424 25667 0 0 0.00% 0.00%
C 153424 25686 0 0 0.00% 0.00%
D 153424 25059 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 1706 11.62 452 429 109.9
A 7 110 1375 8.61 452 429 109.9
A 9 19 1314 8.06 452 429 109.9
B 2 9 1268 9.9 437 421 85.5
B 5 128 1095 7.88 437 421 85.5
B 2 8 1061 7.48 437 421 85.5
C 1 80 1311 7.91 442 419 112.7
C 1 81 1296 7.78 442 419 112.7
C 3 126 1184 6.79 442 419 112.7
D 7 3 997 6.01 395 363 105.5
D 10 189 977 5.82 395 363 105.5
D 6 231 965 5.71 395 363 105.5

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