ASTROSAT CZTI

Data Quality Report

Orbit 52854

Creation date: 2025-07-16T10:45:24.680791
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/AS1C09_011T08_9000006482_52854cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52854cztM0_level2_quad_clean.evt
Size (bytes)2,547,023,040217,324,800
Size2.4 GB 207.3 MB
Events in quadrant A22,283,6571,445,536
Events in quadrant B26,241,2511,301,054
Events in quadrant C13,922,6241,529,733
Events in quadrant D30,367,156985,937

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0795934
B0912174
C0554364
D01033414

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03880
B03880
C03880
D03880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19096370619.407206%
B19097596531.235273%
C1909716838.812903%
D19097754139.487878%

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 20121 19100 2783 2783 13.83% 14.57%
B 20122 19101 4458 4458 22.15% 23.34%
C 20122 19101 1179 1179 5.86% 6.17%
D 20122 19101 6670 6670 33.15% 34.92%

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 9 191 6270763 13747.03 1827 1786 456.0
A 3 62 4624325 10136.61 1827 1786 456.0
A 0 8 879510 1924.73 1827 1786 456.0
B 8 3 17411707 47147.08 1737 1672 369.3
B 1 255 335533 904.11 1737 1672 369.3
B 4 81 266758 717.86 1737 1672 369.3
C 15 224 2554327 4960.68 1854 1835 514.5
C 2 12 1282561 2489.05 1854 1835 514.5
C 15 144 416988 806.84 1854 1835 514.5
D 12 2 17589189 39904.53 1540 1470 440.7
D 8 176 3616988 8203.2 1540 1470 440.7
D 8 48 614329 1390.51 1540 1470 440.7

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