ASTROSAT CZTI

Data Quality Report

Orbit 07918

Creation date: 2024-06-27T15:25:31.974402
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/AS1A02_027T01_9000001084_07918cztM0_level2.evt modeM0/AS1A02_027T01_9000001084_07918cztM0_level2_quad_clean.evt
Size (bytes)718,787,520143,942,400
Size685.5 MB 137.3 MB
Events in quadrant A4,743,105905,918
Events in quadrant B4,963,123953,250
Events in quadrant C5,814,751940,519
Events in quadrant D5,586,857883,788

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01980
B01980
C01980
D01980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0206393
B0212822
C0235172
D0231102

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9751320.328171%
B97511021.046047%
C97511321.353707%
D97512222.276690%

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 11066 9752 4 4 0.04% 0.04%
B 11066 9752 38 38 0.34% 0.39%
C 11066 9752 42 42 0.38% 0.43%
D 11066 9752 173 173 1.56% 1.77%

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 15 239 115132 477.5 1175 1151 238.7
A 15 234 97059 401.79 1175 1151 238.7
A 0 226 10915 40.9 1175 1151 238.7
B 4 239 161779 726.92 1194 1167 220.9
B 0 214 36424 159.57 1194 1167 220.9
B 10 16 34652 151.55 1194 1167 220.9
C 1 16 1301060 4913.96 1155 1166 264.5
C 12 4 9532 31.63 1155 1166 264.5
C 13 61 8931 29.35 1155 1166 264.5
D 1 52 602094 2165.88 1139 1107 277.5
D 14 34 396401 1424.59 1139 1107 277.5
D 5 233 142525 509.65 1139 1107 277.5

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