ASTROSAT CZTI

Data Quality Report

Orbit 20210908_A09_131T01_9000004690_level2

Creation date: 2025-12-28T22:45:09.276224
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/AS1A09_131T01_9000004690cztM0_level2.fits modeM0/AS1A09_131T01_9000004690cztM0_level2_quad_clean.evt
Size (bytes)2,012,253,1202,218,472,640
Size1.9 GB 2.1 GB
Events in quadrant A12,601,53213,924,107
Events in quadrant B11,689,71413,668,644
Events in quadrant C11,942,36013,180,898
Events in quadrant D10,511,67612,233,630

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A042150
B042060
C042210
D042120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04320640
B06628010
C04833870
D05952320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03020
B03020
C03020
D03030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20728823651.140925%
B20665687374.227799%
C207166151617.318286%
D20705593184.500254%

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 285083 208222 0 0 0.00% 0.00%
B 285083 207524 0 0 0.00% 0.00%
C 285083 207564 0 0 0.00% 0.00%
D 285083 207800 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 12293 11.38 3287 3094 808.1
A 7 110 10136 8.71 3287 3094 808.1
A 0 30 9584 8.03 3287 3094 808.1
B 2 9 9568 11.05 3099 2968 597.4
B 3 80 7930 8.31 3099 2968 597.4
B 2 8 7912 8.28 3099 2968 597.4
C 1 81 9474 8.18 3160 2974 794.3
C 1 80 9316 7.98 3160 2974 794.3
C 12 241 8395 6.83 3160 2974 794.3
D 3 14 7720 6.26 3003 2735 796.0
D 10 189 7549 6.05 3003 2735 796.0
D 6 67 7313 5.75 3003 2735 796.0

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