ASTROSAT CZTI

Data Quality Report

Orbit 20200503_A08_003T08_9000003638_level2

Creation date: 2025-12-10T20:16:07.238467
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/AS1A08_003T08_9000003638cztM0_level2.fits modeM0/AS1A08_003T08_9000003638cztM0_level2_quad_clean.evt
Size (bytes)243,213,120239,443,200
Size231.9 MB 228.4 MB
Events in quadrant A1,485,5921,455,638
Events in quadrant B1,447,5761,478,759
Events in quadrant C1,438,0861,364,061
Events in quadrant D1,231,8081,191,177

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0580810
B0532940
C0588840
D0724180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05220
B05220
C05220
D05220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A256099743.803350%
B256095602.186731%
C256099423.678394%
D2560918687.294311%

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 27789 25609 0 0 0.00% 0.00%
B 27789 25609 0 0 0.00% 0.00%
C 27788 25606 0 0 0.00% 0.00%
D 27789 25603 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 1379 10.61 386 360 96.1
A 7 110 1152 8.24 386 360 96.1
A 9 19 1108 7.79 386 360 96.1
B 2 9 1212 10.92 381 362 77.9
B 3 17 989 8.05 381 362 77.9
B 2 8 982 7.96 381 362 77.9
C 12 241 1071 7.31 379 352 98.3
C 3 126 1004 6.63 379 352 98.3
C 9 209 1002 6.61 379 352 98.3
D 3 14 903 6.09 351 318 96.1
D 10 189 892 5.97 351 318 96.1
D 4 160 881 5.86 351 318 96.1

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