ASTROSAT CZTI

Data Quality Report

Orbit 55455

Creation date: 2025-12-28T16:58:52.725617
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_55455cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55455cztM0_level2_quad_clean.evt
Size (bytes)1,998,406,080228,504,960
Size1.9 GB 217.9 MB
Events in quadrant A8,980,8151,725,942
Events in quadrant B11,084,8861,781,142
Events in quadrant C9,650,2221,650,926
Events in quadrant D42,781,651445,125

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03880
B03880
C03880
D03880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0413155
B0471025
C0433105
D014001618

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A190862691.409410%
B1908610215.349471%
C190864142.169129%
D190841402073.464682%

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 20551 19092 121 121 0.59% 0.63%
B 20551 19091 660 660 3.21% 3.46%
C 20551 19092 260 260 1.27% 1.36%
D 20550 19083 13749 13749 66.91% 72.05%

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 4 159 491726 988.82 1998 1945 495.3
A 0 8 369629 742.32 1998 1945 495.3
A 3 78 192334 384.38 1998 1945 495.3
B 5 236 1991376 4818.86 1945 1871 412.9
B 0 171 945864 2286.48 1945 1871 412.9
B 10 247 140404 335.55 1945 1871 412.9
C 13 3 1477114 2774.19 1944 1922 531.8
C 1 16 176130 327.61 1944 1922 531.8
C 9 38 123138 227.95 1944 1922 531.8
D 2 62 36072781 118506.77 1059 1011 304.4
D 11 129 861230 2826.08 1059 1011 304.4
D 6 239 399561 1309.36 1059 1011 304.4

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