ASTROSAT CZTI

Data Quality Report

Orbit 20181205_T03_063T01_9000002550_level2

Creation date: 2025-11-26T04:10:44.905111
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/AS1T03_063T01_9000002550cztM0_level2.fits modeM0/AS1T03_063T01_9000002550cztM0_level2_quad_clean.evt
Size (bytes)658,944,000628,522,560
Size628.4 MB 599.4 MB
Events in quadrant A4,055,3103,762,177
Events in quadrant B3,898,9963,777,464
Events in quadrant C3,949,3443,586,346
Events in quadrant D3,438,0923,294,344

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013680
B013680
C013680
D013680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01413110
B01476030
C01421870
D01559310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A672987081.052037%
B672999281.378921%
C672998481.260048%
D6729913081.943565%

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 78270 67296 0 0 0.00% 0.00%
B 78270 67298 0 0 0.00% 0.00%
C 78270 67299 0 0 0.00% 0.00%
D 78270 67277 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 3786 10.89 1054 988 256.9
A 7 110 3191 8.58 1054 988 256.9
A 9 19 3042 8.0 1054 988 256.9
B 2 9 3200 10.95 1030 983 202.5
B 2 8 2643 8.2 1030 983 202.5
B 5 128 2605 8.01 1030 983 202.5
C 12 241 2748 6.63 1044 975 267.6
C 2 191 2627 6.17 1044 975 267.6
C 3 158 2603 6.08 1044 975 267.6
D 6 231 2472 6.04 981 893 261.5
D 3 14 2464 6.01 981 893 261.5
D 7 3 2395 5.74 981 893 261.5

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