ASTROSAT CZTI

Data Quality Report

Orbit 20170112_T01_151T01_9000000960_level2

Creation date: 2025-11-09T03:16:11.670421
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/AS1T01_151T01_9000000960cztM0_level2.fits modeM0/AS1T01_151T01_9000000960cztM0_level2_quad_clean.evt
Size (bytes)1,162,186,5601,200,718,080
Size1.1 GB 1.1 GB
Events in quadrant A7,054,8287,325,135
Events in quadrant B6,771,6227,261,840
Events in quadrant C6,897,4766,883,436
Events in quadrant D5,987,0406,410,266

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025260
B025240
C025240
D025260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02170
B02170
C02170
D02170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02579080
B02674620
C02541740
D02707600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12383018181.468142%
B12383221591.743491%
C1238329460.763938%
D12383020051.619155%

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 145215 123816 0 0 0.00% 0.00%
B 145215 123821 0 0 0.00% 0.00%
C 145215 123835 0 0 0.00% 0.00%
D 145215 123822 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 6958 11.38 1835 1714 461.0
A 7 110 5800 8.86 1835 1714 461.0
A 0 30 5337 7.86 1835 1714 461.0
B 2 9 5722 11.42 1787 1700 352.3
B 5 128 4671 8.43 1787 1700 352.3
B 12 226 4659 8.4 1787 1700 352.3
C 1 80 4950 6.82 1819 1681 479.4
C 1 81 4936 6.79 1819 1681 479.4
C 12 241 4821 6.55 1819 1681 479.4
D 3 14 4411 6.28 1708 1550 455.6
D 6 231 4399 6.25 1708 1550 455.6
D 7 5 4343 6.13 1708 1550 455.6

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