ASTROSAT CZTI

Data Quality Report

Orbit 20170109_A02_165T06_9000000952_level2

Creation date: 2025-11-09T02:14:05.584151
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/AS1A02_165T06_9000000952cztM0_level2.fits modeM0/AS1A02_165T06_9000000952cztM0_level2_quad_clean.evt
Size (bytes)72,351,36063,236,160
Size69.0 MB 60.3 MB
Events in quadrant A436,752361,850
Events in quadrant B416,140356,591
Events in quadrant C434,624346,025
Events in quadrant D376,544322,690

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157870
B0171760
C0157610
D0168550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75751181.557756%
B75752513.313531%
C75751101.452145%
D75751592.099010%

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 8670 7575 0 0 0.00% 0.00%
B 8670 7572 0 0 0.00% 0.00%
C 8670 7575 0 0 0.00% 0.00%
D 8670 7574 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 14 188 452 11.41 113 106 30.3
A 0 29 388 9.3 113 106 30.3
A 14 204 370 8.7 113 106 30.3
B 2 9 361 10.35 109 104 24.8
B 3 17 312 8.38 109 104 24.8
B 5 128 288 7.41 109 104 24.8
C 1 81 329 6.93 114 107 32.0
C 1 80 317 6.56 114 107 32.0
C 2 191 299 6.0 114 107 32.0
D 6 231 306 6.88 107 98 30.2
D 7 5 283 6.12 107 98 30.2
D 15 63 274 5.82 107 98 30.2

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