ASTROSAT CZTI

Data Quality Report

Orbit 20180527_G08_066T04_9000002122_level2

Creation date: 2025-11-22T14:28:23.944519
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/AS1G08_066T04_9000002122cztM0_level2.fits modeM0/AS1G08_066T04_9000002122cztM0_level2_quad_clean.evt
Size (bytes)380,450,880313,735,680
Size362.8 MB 299.2 MB
Events in quadrant A2,316,8861,790,785
Events in quadrant B2,237,5941,788,720
Events in quadrant C2,283,7741,645,449
Events in quadrant D1,958,8941,550,624

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08100
B08100
C08100
D08100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0857850
B0861130
C0952860
D0957000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0740
B0740
C0740
D0740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A396803580.902218%
B396805671.428931%
C396802840.715726%
D3968014083.548387%

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 47120 39674 0 0 0.00% 0.00%
B 47120 39674 0 0 0.00% 0.00%
C 47120 39676 0 0 0.00% 0.00%
D 47120 39666 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 2277 11.36 602 563 150.9
A 7 110 1892 8.81 602 563 150.9
A 9 19 1852 8.54 602 563 150.9
B 2 9 1884 11.3 589 561 117.1
B 14 254 1548 8.43 589 561 117.1
B 5 128 1511 8.11 589 561 117.1
C 12 241 1639 6.87 603 563 156.7
C 2 191 1543 6.26 603 563 156.7
C 3 158 1526 6.15 603 563 156.7
D 6 231 1450 6.27 559 509 150.0
D 3 14 1436 6.18 559 509 150.0
D 7 3 1412 6.02 559 509 150.0

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