ASTROSAT CZTI

Data Quality Report

Orbit 20180910_T02_087T01_9000002352_level2

Creation date: 2025-11-24T14:38:18.768733
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/AS1T02_087T01_9000002352cztM0_level2.fits modeM0/AS1T02_087T01_9000002352cztM0_level2_quad_clean.evt
Size (bytes)642,464,640531,846,720
Size612.7 MB 507.2 MB
Events in quadrant A3,932,9443,018,269
Events in quadrant B3,764,0763,003,265
Events in quadrant C3,808,2462,846,926
Events in quadrant D3,349,1202,634,761

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01394250
B01454230
C01394460
D01380820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019360
B019360
C019360
D013380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A657079821.494514%
B6569111761.790200%
C6568112271.868120%
D656706090.927364%

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 77126 65706 0 0 0.00% 0.00%
B 77126 65687 0 0 0.00% 0.00%
C 77126 65670 0 0 0.00% 0.00%
D 77126 65671 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 3783 11.14 1023 958 253.6
A 7 110 3229 8.95 1023 958 253.6
A 15 236 2930 7.78 1023 958 253.6
B 2 9 3070 10.84 994 949 195.7
B 2 8 2595 8.41 994 949 195.7
B 14 254 2473 7.79 994 949 195.7
C 1 80 2898 7.56 1006 937 259.5
C 1 81 2893 7.54 1006 937 259.5
C 12 241 2608 6.44 1006 937 259.5
D 6 231 2457 6.28 955 869 252.8
D 3 14 2445 6.23 955 869 252.8
D 10 189 2359 5.89 955 869 252.8

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