ASTROSAT CZTI

Data Quality Report

Orbit 55266

Creation date: 2025-12-15T20:29:30.007401
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_009T01_9000006534_55266cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55266cztM0_level2_quad_clean.evt
Size (bytes)1,155,329,280283,559,040
Size1.1 GB 270.4 MB
Events in quadrant A10,268,3731,815,101
Events in quadrant B9,262,8211,967,007
Events in quadrant C10,666,9881,782,167
Events in quadrant D10,993,9461,623,221

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04100
B04100
C04100
D04100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0459734
B0431613
C0467533
D0476483

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A203036673.285229%
B203045662.787628%
C203044712.319740%
D203046343.122537%

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 21568 20306 236 236 1.09% 1.16%
B 21569 20307 59 59 0.27% 0.29%
C 21569 20307 235 235 1.09% 1.16%
D 21569 20307 315 315 1.46% 1.55%

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 8 1253635 2381.28 2145 2084 525.6
A 12 115 364939 690.39 2145 2084 525.6
A 3 78 168379 316.4 2145 2084 525.6
B 5 185 534359 1161.89 2129 2041 458.1
B 10 189 59902 126.29 2129 2041 458.1
B 0 182 59492 125.4 2129 2041 458.1
C 13 3 769999 1340.79 2103 2079 572.7
C 12 249 459476 798.62 2103 2079 572.7
C 14 254 318115 551.8 2103 2079 572.7
D 7 96 880480 1494.93 2090 1997 587.6
D 11 129 604177 1024.74 2090 1997 587.6
D 15 122 278270 470.14 2090 1997 587.6

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