ASTROSAT CZTI

Data Quality Report

Orbit 57587

Creation date: 2026-05-21T00:19:00.270822
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/AS1A14_070T08_9000006576_57587cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57587cztM0_level2_quad_clean.evt
Size (bytes)541,382,400107,184,960
Size516.3 MB 102.2 MB
Events in quadrant A3,349,773716,129
Events in quadrant B6,048,861711,402
Events in quadrant C5,527,668659,370
Events in quadrant D4,528,719634,037

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154810
B0232220
C0216650
D0186365

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7536150.199045%
B753775910.070320%
C75374075.400027%
D75362082.760085%

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 7536 7536 7 7 0.09% 0.09%
B 7537 7537 453 453 6.01% 6.01%
C 7537 7537 356 356 4.72% 4.72%
D 7536 7536 156 156 2.07% 2.07%

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 4 249 79125 392.6 810 789 199.5
A 3 14 69888 346.31 810 789 199.5
A 7 160 28446 138.61 810 789 199.5
B 2 249 2590524 15852.26 771 743 163.4
B 5 185 158815 967.57 771 743 163.4
B 0 245 98025 595.47 771 743 163.4
C 15 224 2154428 10424.41 765 759 206.6
C 14 254 104775 503.47 765 759 206.6
C 12 254 93302 447.94 765 759 206.6
D 2 249 466679 2138.27 774 738 217.9
D 3 224 297234 1360.66 774 738 217.9
D 3 12 131481 600.0 774 738 217.9

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