ASTROSAT CZTI

Data Quality Report

Orbit 21897

Creation date: 2024-06-27T18:33:36.362742
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/AS1A07_010T05_9000003236_21897cztM0_level2.evt modeM0/AS1A07_010T05_9000003236_21897cztM0_level2_quad_clean.evt
Size (bytes)919,825,920172,160,640
Size877.2 MB 164.2 MB
Events in quadrant A6,302,8211,101,072
Events in quadrant B6,671,3681,111,767
Events in quadrant C7,526,7391,051,488
Events in quadrant D6,477,6651,052,875

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0274123
B0282613
C0310333
D0280423

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02640
B02640
C02640
D02640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A129821651.270991%
B129822211.702357%
C129827585.838854%
D129821531.178555%

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 15967 12982 2 2 0.01% 0.02%
B 15967 12982 24 24 0.15% 0.18%
C 15967 12982 473 473 2.96% 3.64%
D 15967 12982 15 15 0.09% 0.12%

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 5 16 53491 161.71 1620 1584 321.0
A 13 254 23277 67.58 1620 1584 321.0
A 0 226 13891 38.34 1620 1584 321.0
B 3 64 137190 453.92 1611 1571 298.8
B 0 230 81136 266.31 1611 1571 298.8
B 0 197 53831 174.92 1611 1571 298.8
C 10 22 1413405 4049.74 1505 1515 348.6
C 14 238 238585 679.99 1505 1515 348.6
C 4 175 12310 30.96 1505 1515 348.6
D 7 238 228466 552.46 1566 1529 410.8
D 1 52 135961 327.26 1566 1529 410.8
D 2 234 60348 143.19 1566 1529 410.8

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