ASTROSAT CZTI

Data Quality Report

Orbit 57758

Creation date: 2026-06-03T15:59:52.503817
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_083T16_9000006580_57758cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57758cztM0_level2_quad_clean.evt
Size (bytes)467,668,80095,768,640
Size446.0 MB 91.3 MB
Events in quadrant A3,021,490644,051
Events in quadrant B3,653,902683,943
Events in quadrant C6,348,185556,540
Events in quadrant D3,781,291560,588

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137351
B0153191
C0232991
D0159561

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6519520.797668%
B65191732.653781%
C652076011.656442%
D65202133.266871%

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 7649 6521 26 26 0.34% 0.40%
B 7649 6521 69 69 0.90% 1.06%
C 7650 6522 586 586 7.66% 8.98%
D 7650 6522 155 155 2.03% 2.38%

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 13 248 165932 963.08 692 675 171.6
A 3 128 99529 576.1 692 675 171.6
A 3 245 34021 194.33 692 675 171.6
B 4 158 175219 1198.64 686 660 145.6
B 4 80 133377 911.32 686 660 145.6
B 0 213 83599 569.51 686 660 145.6
C 15 224 2335387 13051.92 654 646 178.9
C 9 38 790960 4418.1 654 646 178.9
C 15 208 295357 1647.53 654 646 178.9
D 8 240 322936 1717.08 666 635 187.7
D 2 249 237783 1263.42 666 635 187.7
D 13 138 226843 1205.14 666 635 187.7

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