ASTROSAT CZTI

Data Quality Report

Orbit 55881

Creation date: 2026-01-26T05:09:18.259955
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_030T02_9000006544_55881cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55881cztM0_level2_quad_clean.evt
Size (bytes)533,393,28091,157,760
Size508.7 MB 86.9 MB
Events in quadrant A3,578,306620,141
Events in quadrant B2,992,981677,333
Events in quadrant C3,859,721589,599
Events in quadrant D8,811,908422,954

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154952
B0136982
C0160392
D0306862

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64551462.261813%
B6455530.821069%
C64552273.516654%
D6455191529.666925%

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 7655 6456 106 106 1.38% 1.64%
B 7655 6456 21 21 0.27% 0.33%
C 7655 6456 176 176 2.30% 2.73%
D 7655 6456 1626 1626 21.24% 25.19%

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 15 32 403610 2441.98 668 652 165.0
A 12 115 194217 1173.03 668 652 165.0
A 0 8 134677 812.21 668 652 165.0
B 5 185 75589 518.9 671 648 144.4
B 0 153 51919 355.01 671 648 144.4
B 2 249 45571 311.05 671 648 144.4
C 12 254 800592 4478.18 655 649 178.6
C 13 3 230602 1287.3 655 649 178.6
C 12 252 114763 638.82 655 649 178.6
D 11 129 5510921 33799.61 574 550 163.0
D 2 31 302751 1853.65 574 550 163.0
D 2 62 248474 1520.72 574 550 163.0

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