ASTROSAT CZTI

Data Quality Report

Orbit 51482

Creation date: 2025-04-05T01:10:33.373822
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_9000006458_51482cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51482cztM0_level2_quad_clean.evt
Size (bytes)713,710,08085,302,720
Size680.6 MB 81.4 MB
Events in quadrant A8,936,708514,538
Events in quadrant B3,426,979660,090
Events in quadrant C4,084,706584,880
Events in quadrant D9,472,756374,251

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0309791
B0145581
C0166451
D0327173

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6431138321.505209%
B64311802.798943%
C64322594.026741%
D6431236036.697248%

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 7436 6432 1074 1074 14.44% 16.70%
B 7436 6431 45 45 0.61% 0.70%
C 7437 6433 183 183 2.46% 2.84%
D 7435 6431 2286 2286 30.75% 35.55%

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 3264622 20317.1 657 642 160.7
A 15 174 1770114 11014.33 657 642 160.7
A 12 194 378114 2349.63 657 642 160.7
B 7 252 102653 681.89 699 674 149.6
B 12 32 89270 592.41 699 674 149.6
B 0 245 58550 386.99 699 674 149.6
C 13 3 672332 3591.41 681 675 187.0
C 10 171 475225 2537.46 681 675 187.0
C 14 254 102783 545.98 681 675 187.0
D 8 176 3551125 22790.56 560 542 155.8
D 3 12 3223771 20689.33 560 542 155.8
D 11 176 174250 1115.0 560 542 155.8

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