ASTROSAT CZTI

Data Quality Report

Orbit 26646

Creation date: 2024-06-27T19:31:19.914216
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_145T01_9000003848_26646cztM0_level2.evt modeM0/AS1A09_145T01_9000003848_26646cztM0_level2_quad_clean.evt
Size (bytes)1,350,311,040254,675,520
Size1.3 GB 242.9 MB
Events in quadrant A8,954,8521,661,467
Events in quadrant B9,437,0921,677,628
Events in quadrant C9,048,7221,600,969
Events in quadrant D12,258,1281,553,534

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0371940
B0387240
C0375160
D0481950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A177041360.768188%
B177051931.090088%
C177052611.474160%
D177059685.467382%

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 21709 17708 4 4 0.02% 0.02%
B 21710 17709 5 5 0.02% 0.03%
C 21710 17709 13 13 0.06% 0.07%
D 21710 17709 676 676 3.11% 3.82%

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 13 120698 259.89 2291 2252 455.8
A 13 254 27089 54.5 2291 2252 455.8
A 3 137 20297 39.59 2291 2252 455.8
B 3 112 372564 870.63 2265 2219 425.4
B 0 190 78882 180.22 2265 2219 425.4
B 0 219 64289 145.92 2265 2219 425.4
C 14 238 353293 694.12 2176 2199 505.8
C 15 208 127211 247.15 2176 2199 505.8
C 3 233 79141 152.12 2176 2199 505.8
D 1 52 1546982 2707.36 2141 2107 570.6
D 7 80 1128825 1974.55 2141 2107 570.6
D 12 233 1116790 1953.46 2141 2107 570.6

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