ASTROSAT CZTI

Data Quality Report

Orbit 36438

Creation date: 2022-07-19T04:06:25.435826
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/AS1C07_009T01_9000005200_36438cztM0_level2.evt modeM0/AS1C07_009T01_9000005200_36438cztM0_level2_quad_clean.evt
Size (bytes)413,360,64086,610,240
Size394.2 MB 82.6 MB
Events in quadrant A2,545,365576,185
Events in quadrant B3,724,019566,325
Events in quadrant C2,938,843560,290
Events in quadrant D2,944,696543,575

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111363
B0146402
C0119942
D0125552

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A537570.130233%
B53753205.953488%
C5375981.823256%
D5375871.618605%

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 7079 5376 2 2 0.03% 0.04%
B 7079 5376 197 197 2.78% 3.66%
C 7079 5376 66 66 0.93% 1.23%
D 7079 5376 78 78 1.10% 1.45%

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 10 83 190074 1557.17 601 590 121.7
A 7 3 16981 134.7 601 590 121.7
A 13 254 9266 71.3 601 590 121.7
B 5 172 629430 5644.45 584 568 111.4
B 0 190 181932 1627.86 584 568 111.4
B 0 189 158366 1416.34 584 568 111.4
C 0 10 266320 1986.39 579 582 133.8
C 15 214 229393 1710.36 579 582 133.8
C 0 207 72924 540.76 579 582 133.8
D 13 249 226078 1603.76 582 564 140.6
D 2 250 102485 724.82 582 564 140.6
D 13 171 80703 569.91 582 564 140.6

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