ASTROSAT CZTI

Data Quality Report

Orbit 20181112_A05_004T03_9000002508_level2

Creation date: 2025-11-25T20:05:26.627325
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/AS1A05_004T03_9000002508cztM0_level2.fits modeM0/AS1A05_004T03_9000002508cztM0_level2_quad_clean.evt
Size (bytes)642,358,080608,970,240
Size612.6 MB 580.8 MB
Events in quadrant A3,695,7063,196,873
Events in quadrant B3,868,0703,786,139
Events in quadrant C3,876,8143,582,505
Events in quadrant D3,366,2983,235,326

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02383550
B01465390
C01437370
D01757040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013840
B013840
C013840
D013840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01110
D01110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A676641184017.498227%
B676649441.395129%
C676649581.415819%
D6766424993.693249%

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 78875 67619 0 0 0.00% 0.00%
B 78875 67664 0 0 0.00% 0.00%
C 78875 67664 0 0 0.00% 0.00%
D 78875 67594 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 3395 10.59 962 903 235.4
A 7 110 2930 8.61 962 903 235.4
A 0 30 2742 7.81 962 903 235.4
B 2 9 3012 10.12 1023 977 201.1
B 2 8 2664 8.39 1023 977 201.1
B 3 17 2574 7.94 1023 977 201.1
C 12 241 2733 6.76 1025 953 263.3
C 3 126 2681 6.56 1025 953 263.3
C 2 191 2624 6.35 1025 953 263.3
D 3 14 2456 6.2 959 875 254.9
D 6 38 2399 5.98 959 875 254.9
D 6 231 2397 5.97 959 875 254.9

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