ASTROSAT CZTI

Data Quality Report

Orbit 55940

Creation date: 2026-02-05T14:39:48.132108
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_066T02_9000006546_55940cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55940cztM0_level2_quad_clean.evt
Size (bytes)435,677,76094,164,480
Size415.5 MB 89.8 MB
Events in quadrant A4,434,373604,893
Events in quadrant B2,929,513678,191
Events in quadrant C4,317,154569,311
Events in quadrant D3,948,975552,947

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176782
B0134512
C0177162
D0163533

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63924436.930538%
B6392580.907384%
C63924617.212140%
D63912213.457988%

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 7532 6393 510 510 6.77% 7.98%
B 7532 6393 11 11 0.15% 0.17%
C 7532 6393 402 402 5.34% 6.29%
D 7531 6392 144 144 1.91% 2.25%

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 12 115 1560102 9195.74 684 666 169.6
A 3 14 107434 629.59 684 666 169.6
A 0 8 37710 218.44 684 666 169.6
B 10 247 64041 427.47 687 663 148.3
B 7 252 40026 265.49 687 663 148.3
B 12 111 17413 112.97 687 663 148.3
C 14 80 1516819 8324.44 660 653 182.1
C 15 199 106093 578.91 660 653 182.1
C 13 3 83045 452.37 660 653 182.1
D 11 129 833881 4360.1 665 636 191.1
D 2 31 119212 620.47 665 636 191.1
D 15 125 113282 589.44 665 636 191.1

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