ASTROSAT CZTI

Data Quality Report

Orbit 20161014_A02_077T01_9000000732_level2

Creation date: 2025-11-07T00:57:05.666205
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_077T01_9000000732cztM0_level2.fits modeM0/AS1A02_077T01_9000000732cztM0_level2_quad_clean.evt
Size (bytes)923,195,520927,230,400
Size880.4 MB 884.3 MB
Events in quadrant A5,738,2245,698,123
Events in quadrant B5,392,0425,413,050
Events in quadrant C5,077,0175,044,565
Events in quadrant D4,860,4485,040,929

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02155130
B02555920
C01958970
D02306510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020970
B021060
C021240
D020920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01510
B01520
C01550
D01510

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10308612861.247502%
B10267144224.306961%
C924889060.979587%
D10262914781.440139%

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 135460 106586 0 0 0.00% 0.00%
B 135460 106051 0 0 0.00% 0.00%
C 116515 95055 0 0 0.00% 0.00%
D 135460 106128 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 14 188 5774 11.62 1490 1390 377.3
A 0 29 5604 11.17 1490 1390 377.3
A 14 204 5025 9.63 1490 1390 377.3
B 2 9 4654 11.81 1422 1350 279.8
B 12 226 3862 8.98 1422 1350 279.8
B 14 254 3748 8.57 1422 1350 279.8
C 1 80 3659 6.79 1341 1237 356.9
C 1 81 3566 6.53 1341 1237 356.9
C 12 241 3523 6.41 1341 1237 356.9
D 11 82 3766 6.76 1385 1256 371.1
D 3 14 3719 6.64 1385 1256 371.1
D 6 231 3680 6.53 1385 1256 371.1

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