ASTROSAT CZTI

Data Quality Report

Orbit 18155

Creation date: 2024-06-27T17:45:58.027859
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/AS1A05_194T05_9000002702_18155cztM0_level2.evt modeM0/AS1A05_194T05_9000002702_18155cztM0_level2_quad_clean.evt
Size (bytes)615,116,16088,162,560
Size586.6 MB 84.1 MB
Events in quadrant A3,967,549535,575
Events in quadrant B4,189,929542,006
Events in quadrant C4,122,854526,083
Events in quadrant D5,811,831515,476

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169612
B0175232
C0172582
D0228142

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79131391.756603%
B79142162.729340%
C79132723.437382%
D79132973.753317%

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 8713 7916 4 4 0.05% 0.05%
B 8714 7917 5 5 0.06% 0.06%
C 8713 7916 20 20 0.23% 0.25%
D 8713 7916 61 61 0.70% 0.77%

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 15 174 70813 339.79 1001 976 205.5
A 4 2 50680 241.83 1001 976 205.5
A 0 226 8968 38.89 1001 976 205.5
B 7 220 150383 778.59 996 970 191.9
B 0 197 30106 151.83 996 970 191.9
B 4 216 24548 122.86 996 970 191.9
C 4 254 202889 899.92 954 960 224.4
C 14 238 146196 647.26 954 960 224.4
C 3 233 18080 76.3 954 960 224.4
D 7 238 1315643 5519.22 969 940 238.2
D 13 187 487902 2044.3 969 940 238.2
D 12 233 68931 285.43 969 940 238.2

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