ASTROSAT CZTI

Data Quality Report

Orbit 20180622_A04_022T02_9000002184_level2

Creation date: 2025-11-23T02:28:16.924229
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/AS1A04_022T02_9000002184cztM0_level2.fits modeM0/AS1A04_022T02_9000002184cztM0_level2_quad_clean.evt
Size (bytes)1,211,849,2801,178,496,000
Size1.1 GB 1.1 GB
Events in quadrant A7,429,9367,121,697
Events in quadrant B6,928,9606,829,449
Events in quadrant C7,193,9886,675,148
Events in quadrant D6,396,6426,316,271

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02715430
B03222480
C03132890
D02731630

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01840
B01840
C01840
D01840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025980
B025980
C025980
D025980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12769014311.120683%
B12769061634.826533%
C12769017911.402616%
D12769014141.107369%

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 146101 127690 0 0 0.00% 0.00%
B 146101 127570 0 0 0.00% 0.00%
C 146100 127684 0 0 0.00% 0.00%
D 146101 127685 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 7126 11.18 1937 1820 474.6
A 7 110 6040 8.89 1937 1820 474.6
A 0 30 5610 7.99 1937 1820 474.6
B 2 9 6077 12.31 1831 1750 351.4
B 14 254 4572 8.03 1831 1750 351.4
B 5 128 4529 7.91 1831 1750 351.4
C 12 241 5083 6.84 1901 1769 484.6
C 2 191 4915 6.49 1901 1769 484.6
C 3 126 4767 6.19 1901 1769 484.6
D 3 14 4740 6.29 1826 1657 489.8
D 6 231 4655 6.12 1826 1657 489.8
D 10 189 4558 5.92 1826 1657 489.8

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