ASTROSAT CZTI

Data Quality Report

Orbit 55749

Creation date: 2026-01-17T10:52:01.730276
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/AS1A14_099T04_9000006540_55749cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55749cztM0_level2_quad_clean.evt
Size (bytes)667,068,48091,981,440
Size636.2 MB 87.7 MB
Events in quadrant A7,918,250545,995
Events in quadrant B3,248,670703,593
Events in quadrant C5,454,596577,716
Events in quadrant D7,548,745487,759

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0281512
B0146322
C0212422
D0271472

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6736134419.952494%
B67361181.751781%
C673683512.396081%
D6736156123.173990%

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 7836 6737 1055 1055 13.46% 15.66%
B 7836 6737 55 55 0.70% 0.82%
C 7836 6737 608 608 7.76% 9.02%
D 7836 6737 1380 1380 17.61% 20.48%

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 32 3882289 24109.31 649 633 161.0
A 4 249 384875 2386.56 649 633 161.0
A 7 64 331286 2053.71 649 633 161.0
B 2 249 251895 1639.27 716 691 153.2
B 0 199 49110 315.96 716 691 153.2
B 1 207 33571 214.56 716 691 153.2
C 15 199 2089664 11405.3 663 657 183.2
C 9 38 478326 2607.92 663 657 183.2
C 6 223 91606 496.55 663 657 183.2
D 11 129 4864674 26732.78 636 609 182.0
D 3 12 61770 336.14 636 609 182.0
D 5 173 42372 229.53 636 609 182.0

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