ASTROSAT CZTI

Data Quality Report

Orbit 40878

Creation date: 2024-06-27T22:21:39.602476
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/AS1A12_097T01_9000005574_40878cztM0_level2.fits modeM0/AS1A12_097T01_9000005574_40878cztM0_level2_quad_clean.evt
Size (bytes)361,874,88086,264,640
Size345.1 MB 82.3 MB
Events in quadrant A2,870,059587,595
Events in quadrant B2,846,040597,673
Events in quadrant C2,520,570577,676
Events in quadrant D4,751,135482,900

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0117913
B0120722
C0107872
D0176722

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5234170.324799%
B52341292.464654%
C5234250.477646%
D523456010.699274%

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 7057 5235 4 4 0.06% 0.08%
B 7057 5235 84 84 1.19% 1.60%
C 7057 5235 18 18 0.26% 0.34%
D 7057 5235 512 512 7.26% 9.78%

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 533267 4457.5 575 563 119.5
A 12 189 49085 406.02 575 563 119.5
A 13 248 47026 388.79 575 563 119.5
B 5 255 270908 2456.58 572 556 110.1
B 4 171 215931 1957.03 572 556 110.1
B 15 85 70377 634.44 572 556 110.1
C 15 214 223647 1686.94 564 567 132.2
C 0 10 79995 600.64 564 567 132.2
C 5 10 9500 67.55 564 567 132.2
D 12 79 984177 7501.0 530 515 131.1
D 2 249 802880 6118.51 530 515 131.1
D 1 47 573623 4370.29 530 515 131.1

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