ASTROSAT CZTI

Data Quality Report

Orbit 20200304_A07_001T03_9000003548_level2

Creation date: 2021-09-01T11:44:52.514971
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/AS1A07_001T03_9000003548cztM0_level2_bc.evt modeM0/AS1A07_001T03_9000003548cztM0_level2_quad_clean.evt
Size (bytes)506,030,400181,929,600
Size482.6 MB 173.5 MB
Events in quadrant A2,085,2701,335,914
Events in quadrant B2,133,4711,340,074
Events in quadrant C3,087,5641,267,840
Events in quadrant D7,406,361948,922

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01800
B01800
C01800
D01800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189930
B0190670
C0224520
D0477250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8877730.822350%
B8877740.833615%
C88782652.984907%
D8878384943.354359%

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 10062 8877 0 0 0.00% 0.00%
B 10062 8877 3 3 0.03% 0.03%
C 10063 8878 78 78 0.78% 0.88%
D 10063 8865 311 311 3.09% 3.51%

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 13 254 14226 117.17 540 533 116.9
A 0 226 3559 25.89 540 533 116.9
A 12 194 3382 24.38 540 533 116.9
B 0 197 28358 274.5 537 529 101.4
B 5 172 11612 109.32 537 529 101.4
B 0 245 7867 72.38 537 529 101.4
C 0 239 1037445 8494.58 507 506 122.1
C 0 10 62570 508.43 507 506 122.1
C 7 221 33701 271.93 507 506 122.1
D 12 218 4482977 46167.29 405 392 97.1
D 2 82 528791 5442.12 405 392 97.1
D 8 195 350261 3603.39 405 392 97.1

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