ASTROSAT CZTI

Data Quality Report

Orbit 20220228_A09_038T41_9000004978_level2

Creation date: 2026-01-01T14:22:21.734726
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_038T41_9000004978cztM0_level2.fits modeM0/AS1A09_038T41_9000004978cztM0_level2_quad_clean.evt
Size (bytes)79,508,16085,201,920
Size75.8 MB 81.3 MB
Events in quadrant A497,310530,913
Events in quadrant B471,776530,443
Events in quadrant C490,416525,496
Events in quadrant D413,442457,404

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212430
B0185030
C0164830
D0264190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7701400.519413%
B77011942.519153%
C7701400.519413%
D77012873.726789%

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 9824 7700 0 0 0.00% 0.00%
B 9824 7699 0 0 0.00% 0.00%
C 9824 7700 0 0 0.00% 0.00%
D 9824 7696 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 9 19 404 8.42 130 124 33.3
A 7 110 400 8.3 130 124 33.3
A 0 29 395 8.15 130 124 33.3
B 2 9 393 10.11 125 121 26.9
B 3 80 378 9.55 125 121 26.9
B 5 128 365 9.07 125 121 26.9
C 1 81 398 8.05 129 123 34.2
C 3 202 394 7.93 129 123 34.2
C 3 203 382 7.58 129 123 34.2
D 10 189 311 6.25 118 108 32.5
D 7 3 310 6.22 118 108 32.5
D 6 38 293 5.7 118 108 32.5

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