ASTROSAT CZTI

Data Quality Report

Orbit 56856

Creation date: 2026-04-01T18:17:18.047192
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_083T03_9000006562_56856cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56856cztM0_level2_quad_clean.evt
Size (bytes)562,118,40087,681,600
Size536.1 MB 83.6 MB
Events in quadrant A6,280,060514,963
Events in quadrant B3,263,210650,965
Events in quadrant C4,781,927565,028
Events in quadrant D6,002,442492,097

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0229421
B0140501
C0186732
D0219081

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6186123319.932105%
B61862163.491756%
C61864697.581636%
D618693915.179437%

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 7306 6186 1085 1085 14.85% 17.54%
B 7306 6186 76 76 1.04% 1.23%
C 7306 6187 396 396 5.42% 6.40%
D 7306 6187 935 935 12.80% 15.11%

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 62 3218177 20534.82 634 618 156.7
A 3 46 313926 1999.57 634 618 156.7
A 10 251 184404 1172.94 634 618 156.7
B 10 32 160848 1138.42 660 636 140.7
B 10 247 96764 683.06 660 636 140.7
B 10 16 87569 617.72 660 636 140.7
C 13 3 1064090 6055.65 644 638 175.6
C 14 96 771979 4392.28 644 638 175.6
C 15 208 242471 1377.08 644 638 175.6
D 2 249 2924364 16311.38 633 604 179.2
D 8 240 281690 1568.15 633 604 179.2
D 2 31 61109 337.55 633 604 179.2

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