ASTROSAT CZTI

Data Quality Report

Orbit 35277

Creation date: 2022-04-07T16:32:37.442525
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_082T01_9000005056_35277cztM0_level2.evt modeM0/AS1A11_082T01_9000005056_35277cztM0_level2_quad_clean.evt
Size (bytes)517,443,84064,393,920
Size493.5 MB 61.4 MB
Events in quadrant A2,495,963421,410
Events in quadrant B4,838,422409,764
Events in quadrant C3,177,757399,221
Events in quadrant D4,832,522381,281

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0101343
B0176112
C0124202
D0175122

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A480640.083229%
B480681216.895547%
C48061663.454016%
D480675915.792759%

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 6959 4807 0 0 0.00% 0.00%
B 6959 4807 549 549 7.89% 11.42%
C 6959 4807 137 137 1.97% 2.85%
D 6959 4807 725 725 10.42% 15.08%

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 92855 753.04 616 605 122.5
A 13 6 14140 110.49 616 605 122.5
A 13 254 8770 66.65 616 605 122.5
B 5 236 1565901 14875.77 560 547 105.2
B 5 172 1001533 9512.51 560 547 105.2
B 4 232 29459 274.75 560 547 105.2
C 0 10 565596 4240.71 586 593 133.2
C 15 214 202011 1511.77 586 593 133.2
C 4 254 64655 480.83 586 593 133.2
D 8 230 1274129 9345.66 563 548 136.3
D 12 227 513775 3766.11 563 548 136.3
D 10 118 226687 1659.43 563 548 136.3

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