ASTROSAT CZTI

Data Quality Report

Orbit 55803

Creation date: 2026-01-20T23:44:37.455094
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_55803cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55803cztM0_level2_quad_clean.evt
Size (bytes)1,405,704,960268,318,080
Size1.3 GB 255.9 MB
Events in quadrant A17,347,3361,731,633
Events in quadrant B11,833,3281,733,307
Events in quadrant C8,721,6251,729,865
Events in quadrant D12,654,8131,614,463

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0646642
B0507602
C0424182
D0521772

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1909318019.432776%
B1909216168.464278%
C190923591.880369%
D1909211375.955374%

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 19818 19096 1748 1748 8.82% 9.15%
B 19817 19094 1283 1283 6.47% 6.72%
C 19817 19095 230 230 1.16% 1.20%
D 19817 19095 996 996 5.03% 5.22%

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 12 115 3418162 7112.61 1874 1830 480.3
A 15 32 2643931 5500.71 1874 1830 480.3
A 0 8 1378783 2866.74 1874 1830 480.3
B 4 206 3991228 10072.29 1814 1749 396.1
B 0 153 206293 516.41 1814 1749 396.1
B 0 213 162758 406.5 1814 1749 396.1
C 13 3 765911 1481.69 1850 1836 515.7
C 6 223 261435 503.41 1850 1836 515.7
C 15 147 229236 440.97 1850 1836 515.7
D 11 129 3043330 5682.74 1841 1761 535.2
D 7 96 439639 818.11 1841 1761 535.2
D 8 245 372828 693.29 1841 1761 535.2

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