ASTROSAT CZTI

Data Quality Report

Orbit 55756

Creation date: 2026-01-18T02:46:09.661747
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_099T04_9000006540_55756cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55756cztM0_level2_quad_clean.evt
Size (bytes)626,529,60084,767,040
Size597.5 MB 80.8 MB
Events in quadrant A7,484,420477,906
Events in quadrant B3,350,498639,875
Events in quadrant C3,185,664573,334
Events in quadrant D8,670,740424,708

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0266459
B0143960
C0143550
D0302391

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6455146222.649109%
B6457480.743379%
C6457931.440297%
D6457167725.971814%

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 6457 6456 1205 1205 18.66% 18.66%
B 6457 6457 22 22 0.34% 0.34%
C 6457 6457 86 86 1.33% 1.33%
D 6457 6457 1603 1603 24.83% 24.83%

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 4527009 30112.92 604 588 150.3
A 8 192 187405 1242.84 604 588 150.3
A 12 115 130817 866.37 604 588 150.3
B 7 0 519314 3628.89 660 637 142.9
B 2 249 103615 720.48 660 637 142.9
B 5 172 56154 388.42 660 637 142.9
C 6 223 332769 1852.8 648 640 179.3
C 13 3 117682 652.92 648 640 179.3
C 1 16 98749 547.31 648 640 179.3
D 11 129 5745747 34312.25 584 560 167.4
D 6 42 257069 1531.96 584 560 167.4
D 7 96 132484 787.9 584 560 167.4

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