ASTROSAT CZTI

Data Quality Report

Orbit 20200727_A09_138T04_9000003776_level2

Creation date: 2021-01-09T18:51:25.134710
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A09_138T04_9000003776cztM0_level2_bc.evt modeM0/AS1A09_138T04_9000003776cztM0_level2_quad_clean.evt
Size (bytes)12,824,245,4404,559,572,800
Size11.9 GB 4.2 GB
Events in quadrant A94,738,89529,050,472
Events in quadrant B72,983,98030,043,536
Events in quadrant C78,652,12728,517,855
Events in quadrant D119,689,81728,031,019

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A066780
B066780
C066780
D066780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07690090
B06921100
C07229750
D08543210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A32810795902.922827%
B32810652641.604360%
C32810781662.488822%
D328107148034.511638%

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 378517 328073 511 511 0.14% 0.16%
B 378516 328061 3 3 0.00% 0.00%
C 378516 328062 210 210 0.06% 0.06%
D 378516 328067 2714 2714 0.72% 0.83%

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 13 25060199 6554.48 17933 17641 3820.7
A 13 254 475878 119.94 17933 17641 3820.7
A 6 16 320438 79.25 17933 17641 3820.7
B 0 190 845830 244.93 18239 17804 3380.7
B 0 229 826326 239.16 18239 17804 3380.7
B 0 230 673395 193.92 18239 17804 3380.7
C 2 16 6377131 1550.6 17513 17477 4101.4
C 3 233 4474921 1086.8 17513 17477 4101.4
C 13 250 314503 72.42 17513 17477 4101.4
D 1 52 34450562 8486.19 17679 17209 4057.6
D 7 80 8724066 2145.83 17679 17209 4057.6
D 12 233 4615425 1133.24 17679 17209 4057.6

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