ASTROSAT CZTI

Data Quality Report

Orbit 55226

Creation date: 2025-12-13T01:54:26.999466
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_009T01_9000006534_55226cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55226cztM0_level2_quad_clean.evt
Size (bytes)505,935,36092,257,920
Size482.5 MB 88.0 MB
Events in quadrant A3,719,976624,754
Events in quadrant B3,604,046656,407
Events in quadrant C4,845,696552,040
Events in quadrant D6,052,013505,861

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156121
B0155221
C0190971
D0225331

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6519550.843688%
B65201602.453988%
C65205678.696319%
D652075611.595092%

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 7569 6520 38 38 0.50% 0.58%
B 7570 6521 107 107 1.41% 1.64%
C 7570 6521 510 510 6.74% 7.82%
D 7570 6520 768 768 10.15% 11.78%

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 5 113 540117 3188.0 680 663 169.2
A 4 205 168012 988.98 680 663 169.2
A 4 3 109249 641.71 680 663 169.2
B 10 245 207916 1443.03 672 649 143.6
B 5 236 197821 1372.75 672 649 143.6
B 4 81 160560 1113.33 672 649 143.6
C 13 3 1110434 6325.38 643 637 175.5
C 12 254 661455 3766.38 643 637 175.5
C 10 22 150026 851.45 643 637 175.5
D 2 249 2246687 12775.81 622 596 175.8
D 11 129 802310 4560.17 622 596 175.8
D 3 12 152362 863.25 622 596 175.8

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