ASTROSAT CZTI

Data Quality Report

Orbit 20210531_A10_094T81_9000004426_level2

Creation date: 2025-12-26T05:48:35.002414
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/AS1A10_094T81_9000004426cztM0_level2.fits modeM0/AS1A10_094T81_9000004426cztM0_level2_quad_clean.evt
Size (bytes)447,477,120558,408,960
Size426.7 MB 532.5 MB
Events in quadrant A2,839,7383,888,864
Events in quadrant B2,660,1763,818,444
Events in quadrant C2,756,6303,660,809
Events in quadrant D2,083,6402,339,590

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0570
B0570
C0570
D0570

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020260
B01417920
C01037290
D02597500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09480
B09480
C09480
D09480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A466898491.818415%
B466898471.814132%
C466899932.126839%
D466891566933.560368%

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 52288 46685 0 0 0.00% 0.00%
B 52289 46682 0 0 0.00% 0.00%
C 52289 46683 0 0 0.00% 0.00%
D 52289 46618 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 2265 8.6 741 699 182.1
A 7 110 2242 8.47 741 699 182.1
A 9 19 2132 7.87 741 699 182.1
B 2 9 2099 10.32 704 675 138.0
B 3 80 1837 8.42 704 675 138.0
B 2 8 1798 8.14 704 675 138.0
C 3 187 1904 6.74 728 686 180.7
C 3 126 1899 6.71 728 686 180.7
C 12 241 1878 6.6 728 686 180.7
D 15 46 1630 6.79 596 545 159.8
D 10 189 1481 5.86 596 545 159.8
D 3 14 1475 5.82 596 545 159.8

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