ASTROSAT CZTI

Data Quality Report

Orbit 20200418_C05_012T06_9000003616_level2

Creation date: 2025-12-10T15:03:46.023957
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/AS1C05_012T06_9000003616cztM0_level2.fits modeM0/AS1C05_012T06_9000003616cztM0_level2_quad_clean.evt
Size (bytes)928,414,0801,110,844,800
Size885.4 MB 1.0 GB
Events in quadrant A5,847,7467,271,733
Events in quadrant B5,524,8467,266,009
Events in quadrant C5,275,2406,270,939
Events in quadrant D4,951,2886,324,184

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01992410
B02041950
C03464200
D02326020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019380
B019380
C019380
D019380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01470
B01470
C01470
D01470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A949829020.949654%
B9498212571.323409%
C949821432915.086016%
D9498227722.918448%

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 109838 94976 0 0 0.00% 0.00%
B 109838 94970 0 0 0.00% 0.00%
C 109838 94959 0 0 0.00% 0.00%
D 109838 94957 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 5528 11.11 1522 1434 368.4
A 7 110 4600 8.59 1522 1434 368.4
A 9 19 4399 8.05 1522 1434 368.4
B 2 9 4413 10.61 1464 1404 283.5
B 3 17 3724 8.18 1464 1404 283.5
B 2 8 3717 8.16 1464 1404 283.5
C 12 241 3683 6.73 1396 1313 352.3
C 3 126 3567 6.4 1396 1313 352.3
C 3 187 3533 6.3 1396 1313 352.3
D 3 14 3630 6.18 1415 1289 378.7
D 10 189 3517 5.88 1415 1289 378.7
D 15 46 3497 5.83 1415 1289 378.7

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