ASTROSAT CZTI

Data Quality Report

Orbit 57787

Creation date: 2026-06-03T09:18:39.857336
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_083T16_9000006580_57787cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57787cztM0_level2_quad_clean.evt
Size (bytes)524,185,92092,280,960
Size499.9 MB 88.0 MB
Events in quadrant A2,796,161628,956
Events in quadrant B3,312,540676,848
Events in quadrant C8,141,961516,501
Events in quadrant D4,661,712530,259

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129401
B0142801
C0286741
D0182571

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6331250.394882%
B6331630.995103%
C6331109317.264255%
D63324016.332912%

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 7471 6332 0 0 0.00% 0.00%
B 7471 6332 15 15 0.20% 0.24%
C 7471 6332 913 913 12.22% 14.42%
D 7472 6333 362 362 4.84% 5.72%

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 3 128 99179 591.25 672 656 166.6
A 3 14 57974 343.97 672 656 166.6
A 4 158 17215 99.37 672 656 166.6
B 4 80 335874 2353.67 669 645 142.4
B 10 247 148821 1040.36 669 645 142.4
B 0 63 39859 275.32 669 645 142.4
C 9 38 4328987 25596.62 620 614 169.1
C 15 224 1076539 6362.68 620 614 169.1
C 12 2 147134 866.47 620 614 169.1
D 8 160 975549 5439.0 634 605 179.3
D 2 153 778149 4337.75 634 605 179.3
D 2 172 116631 647.28 634 605 179.3

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