ASTROSAT CZTI

Data Quality Report

Orbit 55440

Creation date: 2025-12-27T13:26:50.006943
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/AS1A14_099T01_9000006536_55440cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55440cztM0_level2_quad_clean.evt
Size (bytes)1,142,107,200229,996,800
Size1.1 GB 219.3 MB
Events in quadrant A9,008,8361,492,467
Events in quadrant B9,253,4531,498,999
Events in quadrant C9,522,6371,412,703
Events in quadrant D12,982,9681,216,505

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0415826
B0422193
C0433073
D0528863

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A194711860.955267%
B194713681.889990%
C194723261.674199%
D194729144.693919%

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 20801 19749 64 64 0.31% 0.32%
B 20801 19749 127 127 0.61% 0.64%
C 20802 19750 228 228 1.10% 1.15%
D 20802 19750 685 685 3.29% 3.47%

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 3 78 401367 794.4 2042 1991 502.7
A 0 8 216212 426.11 2042 1991 502.7
A 4 159 215161 424.02 2042 1991 502.7
B 12 32 346510 808.18 2015 1937 426.4
B 10 247 197839 459.48 2015 1937 426.4
B 7 252 163827 379.71 2015 1937 426.4
C 13 3 1149392 2108.23 1987 1964 544.3
C 14 254 206447 375.71 1987 1964 544.3
C 9 38 99308 178.86 1987 1964 544.3
D 11 129 2194800 4001.29 1952 1866 548.1
D 8 48 1490567 2716.32 1952 1866 548.1
D 3 12 406063 737.51 1952 1866 548.1

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