ASTROSAT CZTI

Data Quality Report

Orbit 51496

Creation date: 2025-04-06T00:12:50.935601
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/AS1A13_090T01_9000006458_51496cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51496cztM0_level2_quad_clean.evt
Size (bytes)674,634,24088,404,480
Size643.4 MB 84.3 MB
Events in quadrant A5,329,505602,456
Events in quadrant B4,460,945662,655
Events in quadrant C3,398,552606,460
Events in quadrant D11,280,503352,771

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0202551
B0174481
C0147961
D0380081

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64904987.673344%
B64904126.348228%
C64901662.557781%
D6490288744.483821%

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 7528 6493 285 285 3.79% 4.39%
B 7528 6493 189 189 2.51% 2.91%
C 7528 6493 70 70 0.93% 1.08%
D 7528 6493 2839 2839 37.71% 43.72%

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 12 3 693776 3936.54 722 703 176.1
A 12 2 417521 2367.46 722 703 176.1
A 8 249 337871 1915.06 722 703 176.1
B 6 51 317705 2048.79 719 694 154.7
B 5 185 301927 1946.82 719 694 154.7
B 8 128 229384 1477.98 719 694 154.7
C 13 3 150149 769.22 711 706 194.3
C 9 38 112244 574.11 711 706 194.3
C 15 215 63673 324.11 711 706 194.3
D 8 176 4196625 26247.06 574 555 159.9
D 11 176 3521047 22021.22 574 555 159.9
D 2 216 559001 3493.17 574 555 159.9

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