ASTROSAT CZTI

Data Quality Report

Orbit 20210119_A10_123T07_9000004124_level2

Creation date: 2021-01-21T08:38:37.019195
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/AS1A10_123T07_9000004124cztM0_level2_bc.evt modeM0/AS1A10_123T07_9000004124cztM0_level2_quad_clean.evt
Size (bytes)3,125,813,760849,931,200
Size2.9 GB 810.6 MB
Events in quadrant A20,422,6135,461,385
Events in quadrant B17,279,9425,541,418
Events in quadrant C17,036,6455,313,291
Events in quadrant D35,577,9715,042,823

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01070
B01070
C01070
D01070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01585370
B01461400
C01461800
D02103420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013060
B013060
C013060
D013060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6390633325.213908%
B6390618062.826026%
C6390619753.090477%
D6390653238.329421%

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 74746 63893 201 201 0.27% 0.31%
B 74746 63894 84 84 0.11% 0.13%
C 74746 63898 8 8 0.01% 0.01%
D 74746 63896 548 548 0.73% 0.86%

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 14 239 6551246 8724.4 3508 3456 750.5
A 15 174 170470 222.53 3508 3456 750.5
A 13 254 116053 150.03 3508 3456 750.5
B 5 255 2437900 3669.84 3546 3467 663.4
B 10 245 511695 766.14 3546 3467 663.4
B 4 80 448486 670.85 3546 3467 663.4
C 3 233 3884712 4882.64 3377 3367 794.9
C 14 254 153961 189.44 3377 3367 794.9
C 14 128 24712 26.85 3377 3367 794.9
D 8 195 9336724 12180.43 3377 3276 766.3
D 1 52 8067499 10524.05 3377 3276 766.3
D 12 233 3837693 5004.03 3377 3276 766.3

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