ASTROSAT CZTI

Data Quality Report

Orbit 35887

Creation date: 2022-06-08T22:09:17.936153
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_080T01_9000005146_35887cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35887cztM0_level2_quad_clean.evt
Size (bytes)568,506,24067,207,680
Size542.2 MB 64.1 MB
Events in quadrant A2,677,553444,010
Events in quadrant B6,718,460388,290
Events in quadrant C3,023,543429,664
Events in quadrant D4,447,677410,452

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0320

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0108643
B0233332
C0118502
D0168182

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5167100.193536%
B5167171733.230114%
C5167721.393458%
D51672925.651248%

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 7141 5168 1 1 0.01% 0.02%
B 7141 5168 1570 1570 21.99% 30.38%
C 7141 5168 60 60 0.84% 1.16%
D 7141 5168 255 255 3.57% 4.93%

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 163508 1256.77 641 631 129.6
A 15 233 14393 106.19 641 631 129.6
A 13 6 12528 91.8 641 631 129.6
B 5 63 3783178 37310.41 531 520 101.4
B 5 172 639598 6303.57 531 520 101.4
B 5 255 167359 1645.62 531 520 101.4
C 15 214 216100 1513.85 615 622 142.3
C 0 10 210369 1473.59 615 622 142.3
C 1 23 103886 725.49 615 622 142.3
D 12 227 715160 4788.07 608 593 149.2
D 8 195 387593 2593.15 608 593 149.2
D 13 249 346771 2319.62 608 593 149.2

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