ASTROSAT CZTI

Data Quality Report

Orbit 20210913_T04_054T01_9000004694_level2

Creation date: 2025-12-29T00:40:11.673207
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/AS1T04_054T01_9000004694cztM0_level2.fits modeM0/AS1T04_054T01_9000004694cztM0_level2_quad_clean.evt
Size (bytes)1,021,806,720744,471,360
Size974.5 MB 710.0 MB
Events in quadrant A6,455,8324,205,915
Events in quadrant B5,880,5083,788,468
Events in quadrant C6,131,8843,940,583
Events in quadrant D5,397,0523,533,471

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021000
B021000
C021000
D021000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02164230
B03507620
C02432470
D03047580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01860
B01860
C01860
D01860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10322613151.273904%
B10322685398.272141%
C10322657465.566427%
D10322635573.445837%

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 125862 103228 0 0 0.00% 0.00%
B 125862 103167 0 0 0.00% 0.00%
C 125862 103028 0 0 0.00% 0.00%
D 125862 103204 0 0 0.00% 0.00%

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 0 29 6263 11.4 1681 1583 410.6
A 7 110 5159 8.71 1681 1583 410.6
A 0 30 4815 7.87 1681 1583 410.6
B 2 9 4628 10.29 1556 1490 305.0
B 3 80 3925 7.98 1556 1490 305.0
B 3 17 3903 7.91 1556 1490 305.0
C 1 81 5140 8.87 1623 1525 407.5
C 1 80 4885 8.25 1623 1525 407.5
C 12 241 4257 6.7 1623 1525 407.5
D 4 246 4147 6.78 1538 1402 404.8
D 3 14 3937 6.26 1538 1402 404.8
D 10 189 3908 6.19 1538 1402 404.8

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