ASTROSAT CZTI

Data Quality Report

Orbit 20180825_G08_030T01_9000002326_level2

Creation date: 2025-11-24T05:43:59.457049
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_030T01_9000002326cztM0_level2.fits modeM0/AS1G08_030T01_9000002326cztM0_level2_quad_clean.evt
Size (bytes)230,878,080165,850,560
Size220.2 MB 158.2 MB
Events in quadrant A1,409,224878,463
Events in quadrant B1,359,326877,968
Events in quadrant C1,375,974837,145
Events in quadrant D1,186,120765,854

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04940
B04940
C04940
D04940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0498970
B0506870
C0527450
D0579480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A241491320.546606%
B241491790.741232%
C241492571.064226%
D241496022.492857%

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 29380 24149 0 0 0.00% 0.00%
B 29380 24149 0 0 0.00% 0.00%
C 29380 24149 0 0 0.00% 0.00%
D 29380 24143 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 1389 11.12 367 344 94.0
A 7 110 1119 8.25 367 344 94.0
A 0 30 1087 7.91 367 344 94.0
B 2 9 1019 9.21 360 344 73.3
B 3 17 925 7.93 360 344 73.3
B 5 128 913 7.76 360 344 73.3
C 1 81 1081 7.75 363 339 95.7
C 1 80 1040 7.33 363 339 95.7
C 12 241 960 6.49 363 339 95.7
D 3 14 906 6.6 337 308 90.6
D 7 5 880 6.31 337 308 90.6
D 6 67 874 6.24 337 308 90.6

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