ASTROSAT CZTI

Data Quality Report

Orbit 20190920_A05_144T02_9000003176_level2

Creation date: 2025-12-03T19:00:00.811978
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/AS1A05_144T02_9000003176cztM0_level2.fits modeM0/AS1A05_144T02_9000003176cztM0_level2_quad_clean.evt
Size (bytes)844,804,800813,864,960
Size805.7 MB 776.2 MB
Events in quadrant A5,226,9244,825,767
Events in quadrant B4,983,6804,849,500
Events in quadrant C5,061,3184,728,108
Events in quadrant D4,300,1704,234,475

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01410
B01410
C01410
D01410

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01793920
B01838320
C01984180
D02547850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017900
B017920
C017880
D017820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A876766510.742507%
B877108440.962262%
C8771921742.478368%
D8754157666.586628%

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 102544 88094 0 0 0.00% 0.00%
B 102544 88107 0 0 0.00% 0.00%
C 102543 88136 0 0 0.00% 0.00%
D 102543 87905 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 5140 11.42 1362 1281 337.9
A 7 110 4047 8.19 1362 1281 337.9
A 0 30 3984 8.0 1362 1281 337.9
B 2 9 3968 10.58 1317 1262 255.7
B 2 8 3376 8.27 1317 1262 255.7
B 5 255 3314 8.02 1317 1262 255.7
C 12 241 3530 6.66 1337 1253 341.8
C 9 209 3489 6.54 1337 1253 341.8
C 3 126 3414 6.32 1337 1253 341.8
D 10 189 3053 5.91 1229 1124 326.6
D 7 3 3037 5.86 1229 1124 326.6
D 3 14 3031 5.84 1229 1124 326.6

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