ASTROSAT CZTI

Data Quality Report

Orbit 00987

Creation date: 2024-06-27T14:05:45.447140
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/AS1P01_998T01_9000000188_00987cztM0_level2.evt modeM0/AS1P01_998T01_9000000188_00987cztM0_level2_quad_clean.evt
Size (bytes)1,191,159,36098,568,000
Size1.1 GB 94.0 MB
Events in quadrant A7,597,367659,920
Events in quadrant B8,202,650656,459
Events in quadrant C7,878,653641,975
Events in quadrant D11,956,937563,671

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0272930
B0291220
C0281060
D0403780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A663940.060250%
B6639240.361500%
C663960.090375%
D6639110516.644073%

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 7319 6640 142 142 1.94% 2.14%
B 7319 6640 291 291 3.98% 4.38%
C 7319 6640 178 178 2.43% 2.68%
D 7319 6640 2448 2448 33.45% 36.87%

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 11 79 7640 11.9 1978 1995 474.4
A 12 189 6475 9.44 1978 1995 474.4
A 3 111 5997 8.44 1978 1995 474.4
B 8 234 158866 323.42 2068 2077 484.8
B 7 221 68138 136.27 2068 2077 484.8
B 15 22 44382 87.26 2068 2077 484.8
C 15 241 311682 582.49 1914 1983 531.7
C 3 79 38596 68.86 1914 1983 531.7
C 3 111 36112 64.19 1914 1983 531.7
D 12 188 3840678 7240.1 1712 1778 530.2
D 1 4 1397538 2632.38 1712 1778 530.2
D 13 85 242008 453.07 1712 1778 530.2

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