ASTROSAT CZTI

Data Quality Report

Orbit 55426

Creation date: 2025-12-26T15:01:34.290844
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/AS1A14_099T01_9000006536_55426cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55426cztM0_level2_quad_clean.evt
Size (bytes)745,519,680126,887,040
Size711.0 MB 121.0 MB
Events in quadrant A4,107,540877,345
Events in quadrant B5,273,962921,574
Events in quadrant C4,494,737831,951
Events in quadrant D12,984,764553,802

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01940
B01940
C01940
D01940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193682
B0227162
C0205002
D0451412

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A94711121.182557%
B94723463.652872%
C94721471.551943%
D9472317733.540963%

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 10711 9473 3 3 0.03% 0.03%
B 10712 9474 156 156 1.46% 1.65%
C 10712 9474 57 57 0.53% 0.60%
D 10712 9474 2648 2648 24.72% 27.95%

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 4 159 46791 185.5 1006 980 247.0
A 12 115 43892 173.76 1006 980 247.0
A 4 3 35339 139.12 1006 980 247.0
B 12 32 1094399 5150.81 991 953 212.3
B 0 183 50165 231.82 991 953 212.3
B 5 185 46235 213.31 991 953 212.3
C 13 3 286669 1065.45 980 970 268.1
C 12 252 127319 471.19 980 970 268.1
C 9 38 86149 317.66 980 970 268.1
D 11 129 9090082 39223.71 813 778 231.7
D 8 160 166943 717.06 813 778 231.7
D 11 176 151332 649.7 813 778 231.7

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