ASTROSAT CZTI

Data Quality Report

Orbit 20180913_G08_046T09_9000002362_level2

Creation date: 2025-11-24T16:30:45.335165
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/AS1G08_046T09_9000002362cztM0_level2.fits modeM0/AS1G08_046T09_9000002362cztM0_level2_quad_clean.evt
Size (bytes)242,870,400270,544,320
Size231.6 MB 258.0 MB
Events in quadrant A1,438,7421,635,347
Events in quadrant B1,402,8901,679,173
Events in quadrant C1,434,3981,596,935
Events in quadrant D1,240,9321,444,103

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0646470
B0570000
C0549540
D0726680

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05440
B05440
C05440
D05440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A267229593.588803%
B267224481.676521%
C267224241.586708%
D2672212874.816256%

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 28917 26718 0 0 0.00% 0.00%
B 28917 26717 0 0 0.00% 0.00%
C 28917 26716 0 0 0.00% 0.00%
D 28917 26715 0 0 0.00% 0.00%

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 0 29 1418 11.12 374 349 96.1
A 7 110 1130 8.13 374 349 96.1
A 15 236 1118 8.0 374 349 96.1
B 2 9 1161 10.92 370 354 73.9
B 2 8 1031 9.16 370 354 73.9
B 5 225 949 8.05 370 354 73.9
C 12 241 1053 7.06 379 353 99.1
C 3 158 1008 6.61 379 353 99.1
C 3 126 954 6.06 379 353 99.1
D 6 231 932 6.42 353 320 95.3
D 3 14 896 6.04 353 320 95.3
D 10 189 886 5.93 353 320 95.3

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