ASTROSAT CZTI

Data Quality Report

Orbit 20180406_G08_083T03_9000002022_level2

Creation date: 2025-11-21T14:18:04.446851
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/AS1G08_083T03_9000002022cztM0_level2.fits modeM0/AS1G08_083T03_9000002022cztM0_level2_quad_clean.evt
Size (bytes)484,655,040388,699,200
Size462.2 MB 370.7 MB
Events in quadrant A2,973,7062,200,487
Events in quadrant B2,886,0082,212,288
Events in quadrant C2,952,9442,107,957
Events in quadrant D2,559,4601,943,457

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0994100
B01025820
C01011650
D01043830

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09840
B09840
C09840
D09840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A481734270.886389%
B481735891.222677%
C481734060.842796%
D481735051.048305%

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 58098 48173 0 0 0.00% 0.00%
B 58098 48170 0 0 0.00% 0.00%
C 58098 48172 0 0 0.00% 0.00%
D 58098 48172 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 2716 10.21 775 726 194.9
A 7 110 2355 8.35 775 726 194.9
A 9 19 2147 7.29 775 726 194.9
B 2 9 2485 11.74 760 728 149.7
B 14 254 1924 7.99 760 728 149.7
B 2 8 1878 7.68 760 728 149.7
C 1 81 2177 7.25 779 729 199.8
C 1 80 2143 7.08 779 729 199.8
C 12 241 1986 6.29 779 729 199.8
D 6 231 1866 6.16 730 664 195.2
D 3 14 1864 6.15 730 664 195.2
D 10 189 1813 5.89 730 664 195.2

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