ASTROSAT CZTI

Data Quality Report

Orbit 20210526_A10_021T09_9000004410_level2

Creation date: 2025-12-26T03:38:28.272197
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/AS1A10_021T09_9000004410cztM0_level2.fits modeM0/AS1A10_021T09_9000004410cztM0_level2_quad_clean.evt
Size (bytes)348,462,720276,451,200
Size332.3 MB 263.6 MB
Events in quadrant A2,214,6141,653,935
Events in quadrant B2,077,8321,605,360
Events in quadrant C2,088,1001,527,934
Events in quadrant D1,798,1441,210,228

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0795360
B01056170
C0813920
D01305360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0560
B0560
C0560
D0560

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07040
B07040
C07040
D07040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A345416031.745751%
B345414681.354912%
C3454115214.403463%
D3454130198.740338%

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 40191 34538 0 0 0.00% 0.00%
B 40191 34540 0 0 0.00% 0.00%
C 40191 34537 0 0 0.00% 0.00%
D 40191 34512 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 1714 8.34 577 546 140.1
A 7 110 1706 8.28 577 546 140.1
A 14 95 1606 7.57 577 546 140.1
B 2 9 1745 10.92 550 526 111.7
B 2 8 1379 7.64 550 526 111.7
B 5 128 1362 7.49 550 526 111.7
C 12 241 1424 6.5 552 520 139.1
C 9 233 1412 6.41 552 520 139.1
C 9 209 1396 6.3 552 520 139.1
D 15 46 1366 6.63 513 471 135.0
D 10 189 1346 6.48 513 471 135.0
D 7 3 1279 5.99 513 471 135.0

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