ASTROSAT CZTI

Data Quality Report

Orbit 20180525_T02_046T01_9000002116_level2

Creation date: 2025-11-22T13:28:53.455140
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_046T01_9000002116cztM0_level2.fits modeM0/AS1T02_046T01_9000002116cztM0_level2_quad_clean.evt
Size (bytes)140,137,920147,818,880
Size133.6 MB 141.0 MB
Events in quadrant A851,330915,076
Events in quadrant B809,016901,080
Events in quadrant C826,242835,225
Events in quadrant D719,452786,851

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03060
B03060
C03060
D03060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0309080
B0340260
C0335920
D0351160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A150451571.043536%
B150454022.671984%
C150451330.884015%
D150454723.137255%

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 17235 15042 0 0 0.00% 0.00%
B 17235 15039 0 0 0.00% 0.00%
C 17235 15042 0 0 0.00% 0.00%
D 17235 14942 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 29 807 10.48 221 207 57.3
A 7 110 725 9.05 221 207 57.3
A 9 19 648 7.7 221 207 57.3
B 2 9 685 10.63 213 202 45.4
B 5 225 583 8.39 213 202 45.4
B 3 17 555 7.77 213 202 45.4
C 12 241 589 6.58 218 202 58.8
C 9 188 566 6.19 218 202 58.8
C 3 126 550 5.92 218 202 58.8
D 3 159 513 5.74 205 186 56.9
D 15 46 511 5.71 205 186 56.9
D 6 231 509 5.67 205 186 56.9

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