ASTROSAT CZTI

Data Quality Report

Orbit 20927

Creation date: 2024-06-27T18:21:17.279320
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/AS1C04_001T01_9000003082_20927cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20927cztM0_level2_quad_clean.evt
Size (bytes)444,378,240123,929,280
Size423.8 MB 118.2 MB
Events in quadrant A3,126,230841,523
Events in quadrant B3,569,301844,522
Events in quadrant C3,032,843818,482
Events in quadrant D3,294,570802,582

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134652
B0147702
C0132753
D0142452

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6399330.515706%
B63991211.890920%
C6398620.969053%
D6398811.266021%

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 7519 6400 10 10 0.13% 0.16%
B 7519 6400 81 81 1.08% 1.27%
C 7518 6399 4 4 0.05% 0.06%
D 7518 6399 58 58 0.77% 0.91%

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 5 16 109469 712.93 760 744 152.5
A 15 174 85741 557.34 760 744 152.5
A 8 31 6759 39.44 760 744 152.5
B 3 64 350715 2424.11 764 746 144.4
B 0 229 48569 331.25 764 746 144.4
B 0 219 42976 292.51 764 746 144.4
C 14 238 117502 677.01 737 743 172.5
C 5 4 24780 139.37 737 743 172.5
C 13 61 5148 25.54 737 743 172.5
D 7 38 146649 816.96 739 717 178.6
D 1 52 99375 552.31 739 717 178.6
D 5 222 73251 406.06 739 717 178.6

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