ASTROSAT CZTI

Data Quality Report

Orbit 18087

Creation date: 2024-06-27T17:45:15.982358
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/AS1T03_080T01_9000002686_18087cztM0_level2.evt modeM0/AS1T03_080T01_9000002686_18087cztM0_level2_quad_clean.evt
Size (bytes)720,967,680210,055,680
Size687.6 MB 200.3 MB
Events in quadrant A5,072,0441,450,896
Events in quadrant B5,047,1561,403,978
Events in quadrant C4,985,9491,382,905
Events in quadrant D6,008,1281,388,167

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02180
B02180
C02180
D02180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0225502
B0223522
C0222862
D0257002

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10634500.470190%
B10634860.808727%
C106341111.043822%
D106342842.670679%

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 12189 10636 0 0 0.00% 0.00%
B 12189 10636 7 7 0.06% 0.07%
C 12189 10636 0 0 0.00% 0.00%
D 12189 10636 249 249 2.04% 2.34%

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 2 38296 142.87 1283 1259 259.2
A 15 174 33968 126.18 1283 1259 259.2
A 14 111 32276 119.65 1283 1259 259.2
B 7 220 39371 159.75 1256 1227 238.8
B 0 189 33948 137.04 1256 1227 238.8
B 12 111 28553 114.45 1256 1227 238.8
C 14 238 188618 653.24 1212 1221 286.9
C 3 233 58074 198.18 1212 1221 286.9
C 13 61 8492 25.35 1212 1221 286.9
D 11 176 1067329 3497.73 1234 1202 304.8
D 10 70 128754 418.47 1234 1202 304.8
D 5 222 63351 203.9 1234 1202 304.8

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