ASTROSAT CZTI

Data Quality Report

Orbit 20170921_A03_078T01_9000001546_level2

Creation date: 2025-11-17T06:37:25.418083
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/AS1A03_078T01_9000001546cztM0_level2.fits modeM0/AS1A03_078T01_9000001546cztM0_level2_quad_clean.evt
Size (bytes)1,169,671,6801,154,102,400
Size1.1 GB 1.1 GB
Events in quadrant A7,015,0366,825,960
Events in quadrant B6,824,5866,920,198
Events in quadrant C7,134,1466,803,034
Events in quadrant D5,781,8665,745,655

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03166210
B03157510
C02612510
D03971800

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025840
B025820
C025880
D025860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12638252244.133500%
B12643058354.615202%
C12652410090.797477%
D1258691349010.717492%

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 145086 126837 0 0 0.00% 0.00%
B 145086 126919 0 0 0.00% 0.00%
C 145086 127011 0 0 0.00% 0.00%
D 145086 125251 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 6605 10.68 1826 1703 459.1
A 7 110 5668 8.64 1826 1703 459.1
A 9 19 5299 7.83 1826 1703 459.1
B 2 9 5881 11.55 1797 1703 361.7
B 3 17 4698 8.28 1797 1703 361.7
B 5 128 4555 7.88 1797 1703 361.7
C 1 80 5276 7.19 1885 1745 491.2
C 1 81 5165 6.96 1885 1745 491.2
C 12 241 5067 6.76 1885 1745 491.2
D 3 14 4442 6.65 1651 1503 442.2
D 6 231 4253 6.22 1651 1503 442.2
D 3 31 4052 5.76 1651 1503 442.2

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