ASTROSAT CZTI

Data Quality Report

Orbit 51831

Creation date: 2025-04-28T13:21:12.322490
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/AS1A13_090T01_9000006464_51831cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51831cztM0_level2_quad_clean.evt
Size (bytes)759,582,72075,320,640
Size724.4 MB 71.8 MB
Events in quadrant A4,700,435554,810
Events in quadrant B7,706,331506,602
Events in quadrant C3,708,760547,865
Events in quadrant D11,528,642244,486

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181731
B0271241
C0153631
D0384521

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61093335.450974%
B6109153025.045016%
C61092494.075954%
D6110350657.381342%

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 6984 6110 155 155 2.22% 2.54%
B 6984 6110 1107 1107 15.85% 18.12%
C 6984 6110 141 141 2.02% 2.31%
D 6984 6110 3047 3047 43.63% 49.87%

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 12 3 909607 5610.87 658 641 162.0
A 15 174 500872 3087.83 658 641 162.0
A 5 240 267055 1644.52 658 641 162.0
B 15 54 2891544 21912.07 617 595 131.9
B 4 206 692607 5245.13 617 595 131.9
B 1 223 305647 2312.15 617 595 131.9
C 0 192 323713 1815.9 651 647 177.9
C 12 254 186781 1046.23 651 647 177.9
C 0 176 135470 757.82 651 647 177.9
D 11 129 8556349 65714.58 457 440 130.2
D 8 176 557230 4276.49 457 440 130.2
D 12 6 296731 2275.69 457 440 130.2

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