ASTROSAT CZTI

Data Quality Report

Orbit 20220108_A11_058T01_9000004854_level2

Creation date: 2025-12-31T08:11:48.425385
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/AS1A11_058T01_9000004854cztM0_level2.fits modeM0/AS1A11_058T01_9000004854cztM0_level2_quad_clean.evt
Size (bytes)234,996,480223,516,800
Size224.1 MB 213.2 MB
Events in quadrant A1,517,6661,404,841
Events in quadrant B1,402,2661,369,342
Events in quadrant C1,429,7101,288,249
Events in quadrant D1,167,4421,106,388

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04760
B04760
C04760
D04760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01150
B01150
C01150
D01150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0544940
B0585980
C0513020
D0869430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A232291730.744759%
B232297913.405226%
C232292331.003057%
D23229294612.682423%

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 33389 23228 0 0 0.00% 0.00%
B 33389 23224 0 0 0.00% 0.00%
C 33389 23228 0 0 0.00% 0.00%
D 33389 23191 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 1260 8.92 396 377 99.0
A 7 110 1237 8.69 396 377 99.0
A 0 29 1221 8.53 396 377 99.0
B 2 9 1133 10.57 372 360 73.1
B 3 80 1082 9.88 372 360 73.1
B 5 128 986 8.56 372 360 73.1
C 1 81 1217 8.8 378 359 97.5
C 1 80 1158 8.19 378 359 97.5
C 3 202 1139 8.0 378 359 97.5
D 10 189 883 6.38 335 308 90.1
D 10 113 876 6.3 335 308 90.1
D 6 67 867 6.2 335 308 90.1

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