ASTROSAT CZTI

Data Quality Report

Orbit 20161219_A02_189T01_9000000902_level2

Creation date: 2025-11-08T18:09:58.244439
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/AS1A02_189T01_9000000902cztM0_level2.fits modeM0/AS1A02_189T01_9000000902cztM0_level2_quad_clean.evt
Size (bytes)340,263,360375,814,080
Size324.5 MB 358.4 MB
Events in quadrant A2,041,1322,296,361
Events in quadrant B1,984,1022,310,110
Events in quadrant C2,037,5382,231,289
Events in quadrant D1,660,3001,963,795

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0630
B0630
C0630
D0630

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0854980
B0859520
C0770200
D01140030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07680
B07680
C07620
D07640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A375756981.857618%
B3757312633.361456%
C375882560.681068%
D3752329447.845855%

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 44123 37697 0 0 0.00% 0.00%
B 44123 37682 0 0 0.00% 0.00%
C 44123 37711 0 0 0.00% 0.00%
D 44123 37626 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 2132 11.84 532 499 137.9
A 7 110 1765 9.18 532 499 137.9
A 0 30 1608 8.04 532 499 137.9
B 2 9 1768 11.98 524 500 105.9
B 5 128 1381 8.32 524 500 105.9
B 12 226 1369 8.21 524 500 105.9
C 1 80 1451 6.67 538 503 142.2
C 1 81 1443 6.61 538 503 142.2
C 3 158 1405 6.35 538 503 142.2
D 3 14 1281 6.79 472 431 125.2
D 11 82 1268 6.69 472 431 125.2
D 6 231 1208 6.21 472 431 125.2

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