ASTROSAT CZTI

Data Quality Report

Orbit 20180716_A04_218T03_9000002232_level2

Creation date: 2025-11-23T13:37:10.449684
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_218T03_9000002232cztM0_level2.fits modeM0/AS1A04_218T03_9000002232cztM0_level2_quad_clean.evt
Size (bytes)652,775,040542,975,040
Size622.5 MB 517.8 MB
Events in quadrant A3,976,5703,079,786
Events in quadrant B3,820,7103,094,986
Events in quadrant C3,965,4582,946,123
Events in quadrant D3,387,9382,704,001

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01470270
B01494030
C01434560
D01548930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013720
B013720
C013720
D013720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6732310641.580441%
B6732320713.076215%
C673237581.125915%
D6732324013.566389%

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 77708 67325 0 0 0.00% 0.00%
B 77708 67218 0 0 0.00% 0.00%
C 77708 67328 0 0 0.00% 0.00%
D 77708 67259 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 3862 11.29 1033 965 256.6
A 7 110 3218 8.78 1033 965 256.6
A 15 236 3058 8.16 1033 965 256.6
B 2 9 3338 11.88 1009 960 200.2
B 3 17 2550 7.94 1009 960 200.2
B 14 254 2537 7.88 1009 960 200.2
C 1 80 2889 7.1 1046 974 269.8
C 1 81 2830 6.88 1046 974 269.8
C 12 241 2805 6.79 1046 974 269.8
D 3 14 2475 6.17 967 877 259.0
D 6 231 2442 6.04 967 877 259.0
D 7 3 2377 5.79 967 877 259.0

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