ASTROSAT CZTI

Data Quality Report

Orbit 20200530_A09_027T01_9000003694_level2

Creation date: 2025-12-11T06:46:24.723705
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/AS1A09_027T01_9000003694cztM0_level2.fits modeM0/AS1A09_027T01_9000003694cztM0_level2_quad_clean.evt
Size (bytes)550,103,040464,607,360
Size524.6 MB 443.1 MB
Events in quadrant A3,666,2503,110,658
Events in quadrant B3,457,3263,085,207
Events in quadrant C3,414,1082,840,052
Events in quadrant D2,101,0301,027,289

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01225740
B01296690
C01545010
D03647690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011900
B011900
C011900
D011900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A583835040.863265%
B583839431.615196%
C5838337976.503606%
D583833108153.236387%

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 69408 58382 0 0 0.00% 0.00%
B 69408 58381 0 0 0.00% 0.00%
C 69408 58361 0 0 0.00% 0.00%
D 69408 55589 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 3643 11.87 956 905 230.6
A 7 110 3009 9.12 956 905 230.6
A 0 30 2839 8.39 956 905 230.6
B 2 9 2800 10.81 917 882 177.5
B 2 8 2325 8.13 917 882 177.5
B 5 128 2227 7.58 917 882 177.5
C 12 241 2389 6.76 902 851 227.4
C 3 126 2379 6.72 902 851 227.4
C 3 187 2314 6.43 902 851 227.4
D 4 246 1660 6.99 600 552 158.5
D 10 189 1492 5.93 600 552 158.5
D 7 3 1474 5.82 600 552 158.5

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