ASTROSAT CZTI

Data Quality Report

Orbit 20220226_A07_093T29_9000004968_level2

Creation date: 2022-03-01T14:00:37.920678
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_093T29_9000004968cztM0_level2_bc.evt modeM0/AS1A07_093T29_9000004968cztM0_level2_quad_clean.evt
Size (bytes)685,946,880170,991,360
Size654.2 MB 163.1 MB
Events in quadrant A3,794,0751,085,807
Events in quadrant B5,569,3311,045,642
Events in quadrant C3,335,9481,101,610
Events in quadrant D7,177,5411,039,687

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0301440
B0391570
C0276430
D0407370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02680
B02680
C02680
D02680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A131061721.312376%
B1310611788.988250%
C13106980.747749%
D131063242.472150%

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 17583 13109 55 55 0.31% 0.42%
B 17583 13102 80 80 0.45% 0.61%
C 17583 13107 4 4 0.02% 0.03%
D 17583 13106 18 18 0.10% 0.14%

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 15 174 456711 3140.57 649 638 145.2
A 14 250 322362 2215.43 649 638 145.2
A 15 169 310329 2132.57 649 638 145.2
B 5 172 2532568 19986.85 629 615 126.7
B 5 255 304884 2401.85 629 615 126.7
B 0 190 123875 973.0 629 615 126.7
C 15 214 527486 3545.87 639 632 148.6
C 0 10 193807 1300.12 639 632 148.6
C 14 67 77568 517.8 639 632 148.6
D 8 195 3494714 21639.36 634 615 161.5
D 2 250 351756 2174.66 634 615 161.5
D 2 249 171747 1059.84 634 615 161.5

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