ASTROSAT CZTI

Data Quality Report

Orbit 20200524_A07_171T02_9000003686_level2

Creation date: 2025-12-11T05:11:56.740040
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_171T02_9000003686cztM0_level2.fits modeM0/AS1A07_171T02_9000003686cztM0_level2_quad_clean.evt
Size (bytes)392,973,120439,496,640
Size374.8 MB 419.1 MB
Events in quadrant A2,421,6142,763,628
Events in quadrant B2,245,9182,670,812
Events in quadrant C2,348,1542,621,858
Events in quadrant D2,057,4762,427,461

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07720
B07660
C07740
D07740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0843810
B01044670
C0889350
D0939180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A414003020.729469%
B4141724986.031340%
C414008071.949275%
D414074701.135074%

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 45724 41397 0 0 0.00% 0.00%
B 45724 41379 0 0 0.00% 0.00%
C 45724 41397 0 0 0.00% 0.00%
D 45724 41402 0 0 0.00% 0.00%

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 0 29 2276 10.65 629 590 158.3
A 7 110 1908 8.32 629 590 158.3
A 9 19 1825 7.8 629 590 158.3
B 2 9 1837 10.87 594 569 116.6
B 2 8 1545 8.37 594 569 116.6
B 5 128 1468 7.71 594 569 116.6
C 1 81 1881 8.21 620 580 158.4
C 1 80 1834 7.91 620 580 158.4
C 12 241 1692 7.02 620 580 158.4
D 3 14 1548 6.48 587 536 156.2
D 7 3 1480 6.05 587 536 156.2
D 15 46 1462 5.93 587 536 156.2

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