ASTROSAT CZTI

Data Quality Report

Orbit 35400

Creation date: 2022-04-16T13:02:57.859435
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/AS1A11_099T01_9000005068_35400cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35400cztM0_level2_quad_clean.evt
Size (bytes)1,016,628,48073,416,960
Size969.5 MB 70.0 MB
Events in quadrant A3,152,157538,688
Events in quadrant B14,255,092258,699
Events in quadrant C3,760,881524,090
Events in quadrant D9,167,821430,441

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0138231
B0468751
C0153511
D0318631

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A671690.134008%
B6716515276.712329%
C67161392.069684%
D6716178326.548541%

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 8057 6717 1 1 0.01% 0.01%
B 8057 6717 4529 4529 56.21% 67.43%
C 8057 6717 117 117 1.45% 1.74%
D 8057 6717 1462 1462 18.15% 21.77%

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 128782 824.02 767 751 155.4
A 13 6 25449 158.96 767 751 155.4
A 9 143 17136 105.46 767 751 155.4
B 4 251 4782608 50085.77 495 482 95.5
B 5 14 2392734 25055.34 495 482 95.5
B 5 31 2312309 24213.0 495 482 95.5
C 15 214 276772 1595.81 740 746 173.0
C 0 10 221206 1274.56 740 746 173.0
C 3 233 202824 1168.29 740 746 173.0
D 7 80 4739213 29139.71 653 634 162.6
D 13 249 350122 2149.16 653 634 162.6
D 12 233 327491 2009.99 653 634 162.6

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