ASTROSAT CZTI

Data Quality Report

Orbit 55851

Creation date: 2026-01-24T06:16:00.933852
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_127T10_9000006542_55851cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55851cztM0_level2_quad_clean.evt
Size (bytes)486,936,00092,154,240
Size464.4 MB 87.9 MB
Events in quadrant A3,213,581629,726
Events in quadrant B3,053,940669,302
Events in quadrant C3,525,938584,668
Events in quadrant D7,730,402457,323

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0138902
B0140052
C0154392
D0274862

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6442430.667495%
B6442781.210804%
C64422934.548277%
D6442141621.980751%

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 7547 6442 24 24 0.32% 0.37%
B 7547 6442 45 45 0.60% 0.70%
C 7547 6443 230 230 3.05% 3.57%
D 7546 6441 1472 1472 19.51% 22.85%

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 8 192 184433 1091.71 673 656 168.3
A 4 3 99102 584.81 673 656 168.3
A 0 8 96894 571.69 673 656 168.3
B 5 185 201108 1386.21 665 640 144.6
B 10 247 54185 370.26 665 640 144.6
B 5 172 37811 257.03 665 640 144.6
C 13 3 385505 2167.51 644 637 177.6
C 6 223 265913 1493.99 644 637 177.6
C 12 254 207984 1167.74 644 637 177.6
D 11 129 3212724 18821.27 592 565 170.7
D 7 96 1749802 10249.45 592 565 170.7
D 3 12 124687 727.28 592 565 170.7

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