ASTROSAT CZTI

Data Quality Report

Orbit 20201116_A09_038T40_9000004012_level2

Creation date: 2025-12-17T18:31:06.957059
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_038T40_9000004012cztM0_level2.fits modeM0/AS1A09_038T40_9000004012cztM0_level2_quad_clean.evt
Size (bytes)54,345,60062,593,920
Size51.8 MB 59.7 MB
Events in quadrant A334,156396,867
Events in quadrant B319,016395,843
Events in quadrant C320,033369,567
Events in quadrant D284,004344,158

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B090
C090
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01160
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0113950
B0122920
C0122260
D0123750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5534280.505963%
B5575460.825112%
C5549691.243467%
D5535561.011743%

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 6776 5745 0 0 0.00% 0.00%
B 6776 5765 0 0 0.00% 0.00%
C 6776 5726 0 0 0.00% 0.00%
D 6776 5744 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 29 317 9.94 87 82 23.6
A 7 110 278 8.29 87 82 23.6
A 14 79 266 7.78 87 82 23.6
B 2 9 248 9.14 84 81 18.3
B 5 232 230 8.15 84 81 18.3
B 3 17 225 7.88 84 81 18.3
C 1 80 266 8.17 84 78 23.0
C 1 81 250 7.47 84 78 23.0
C 12 241 248 7.39 84 78 23.0
D 3 14 210 5.8 81 74 23.4
D 6 62 203 5.5 81 74 23.4
D 1 31 200 5.37 81 74 23.4

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