ASTROSAT CZTI

Data Quality Report

Orbit 57475

Creation date: 2026-05-13T12:33:36.761183
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_113T09_9000006574_57475cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57475cztM0_level2_quad_clean.evt
Size (bytes)2,032,761,600335,571,840
Size1.9 GB 320.0 MB
Events in quadrant A12,064,6822,287,151
Events in quadrant B15,191,5002,368,058
Events in quadrant C22,430,9951,972,243
Events in quadrant D23,641,2571,824,756

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05020
B05020
C05020
D05020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0542794
B0624704
C0840454
D0874116

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A248243781.522720%
B2482514125.687815%
C24825301812.157100%
D24824348214.026748%

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 26852 25112 174 174 0.65% 0.69%
B 26853 25110 577 577 2.15% 2.30%
C 26853 25110 2488 2488 9.27% 9.91%
D 26852 25101 3288 3288 12.24% 13.10%

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 10 251 793317 1197.8 2689 2623 660.1
A 7 64 563803 850.11 2689 2623 660.1
A 3 245 94448 139.1 2689 2623 660.1
B 4 206 3243599 5888.96 2605 2500 550.4
B 8 234 319748 576.43 2605 2500 550.4
B 5 185 302875 545.77 2605 2500 550.4
C 15 224 10334321 15459.38 2469 2444 668.3
C 12 254 920858 1374.2 2469 2444 668.3
C 14 254 627631 935.45 2469 2444 668.3
D 15 142 11415597 16672.37 2441 2331 684.6
D 2 249 830708 1210.08 2441 2331 684.6
D 7 96 495059 719.77 2441 2331 684.6

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