ASTROSAT CZTI

Data Quality Report

Orbit 20200822_C05_017T01_9000003836_level2

Creation date: 2025-12-14T13:14:05.349765
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_017T01_9000003836cztM0_level2.fits modeM0/AS1C05_017T01_9000003836cztM0_level2_quad_clean.evt
Size (bytes)1,009,872,000915,125,760
Size963.1 MB 872.7 MB
Events in quadrant A6,407,3225,613,857
Events in quadrant B6,024,7865,507,911
Events in quadrant C6,165,5925,323,110
Events in quadrant D5,146,5044,437,363

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01490
D01470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019360
B020320
C020300
D020360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02116870
B02536120
C02359460
D03593570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9989811291.130153%
B9966347394.755024%
C9980427622.767424%
D996441362213.670668%

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 116886 100504 0 0 0.00% 0.00%
B 116886 100166 0 0 0.00% 0.00%
C 116886 100269 0 0 0.00% 0.00%
D 116886 100048 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 5522 9.83 1667 1572 401.6
A 7 110 5202 9.04 1667 1572 401.6
A 9 19 4806 8.05 1667 1572 401.6
B 2 9 4805 10.65 1590 1520 308.5
B 2 8 3951 7.88 1590 1520 308.5
B 3 17 3895 7.7 1590 1520 308.5
C 12 241 4323 6.84 1629 1529 408.3
C 3 126 4193 6.52 1629 1529 408.3
C 9 209 4163 6.45 1629 1529 408.3
D 4 246 3954 6.78 1468 1341 385.6
D 15 46 3650 5.99 1468 1341 385.6
D 6 67 3613 5.89 1468 1341 385.6

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