ASTROSAT CZTI

Data Quality Report

Orbit 35822

Creation date: 2022-05-19T14:01:10.776001
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/AS1A09_146T01_9000005142_35822cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35822cztM0_level2_quad_clean.evt
Size (bytes)536,045,76058,055,040
Size511.2 MB 55.4 MB
Events in quadrant A5,731,967289,419
Events in quadrant B3,066,505378,333
Events in quadrant C2,885,752370,343
Events in quadrant D4,180,060337,193

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205953
B0125222
C0116922
D0160572

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5450121922.366972%
B5450791.449541%
C5450460.844037%
D54504277.834862%

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 7153 5450 1078 1078 15.07% 19.78%
B 7153 5451 38 38 0.53% 0.70%
C 7153 5451 35 35 0.49% 0.64%
D 7153 5451 233 233 3.26% 4.27%

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 15 169 3345940 29032.03 575 564 115.2
A 10 83 150309 1299.52 575 564 115.2
A 13 254 7968 64.25 575 564 115.2
B 5 172 236602 1916.46 643 626 123.1
B 0 213 91438 737.52 643 626 123.1
B 5 255 71172 572.93 643 626 123.1
C 15 214 231446 1580.49 628 630 146.0
C 0 10 164410 1121.47 628 630 146.0
C 0 207 28864 193.33 628 630 146.0
D 2 250 470786 3110.93 608 589 151.1
D 10 118 390159 2577.49 608 589 151.1
D 13 249 269310 1777.92 608 589 151.1

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