ASTROSAT CZTI

Data Quality Report

Orbit 20171105_A04_022T03_9000001664_level2

Creation date: 2025-11-18T04:32:12.907286
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/AS1A04_022T03_9000001664cztM0_level2.fits modeM0/AS1A04_022T03_9000001664cztM0_level2_quad_clean.evt
Size (bytes)462,314,880423,455,040
Size440.9 MB 403.8 MB
Events in quadrant A2,807,3182,461,202
Events in quadrant B2,631,2282,252,398
Events in quadrant C2,849,2402,601,103
Events in quadrant D2,356,6102,155,447

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0950
B0950
C0950
D0950

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01202370
B01363300
C01005740
D01516050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09980
B09980
C09980
D09980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4886418403.765553%
B4886440648.316961%
C488644690.959807%
D4886440938.376310%

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 58274 48859 0 0 0.00% 0.00%
B 58274 48811 0 0 0.00% 0.00%
C 58274 48865 0 0 0.00% 0.00%
D 58274 48769 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 2686 11.01 731 685 181.7
A 7 110 2244 8.58 731 685 181.7
A 9 19 2098 7.78 731 685 181.7
B 2 9 2254 11.46 694 661 139.0
B 3 17 1747 7.82 694 661 139.0
B 5 128 1730 7.69 694 661 139.0
C 1 81 2129 7.33 749 699 195.2
C 12 250 2126 7.31 749 699 195.2
C 1 80 2124 7.3 749 699 195.2
D 6 231 1692 6.03 670 609 179.5
D 6 38 1661 5.86 670 609 179.5
D 10 189 1659 5.85 670 609 179.5

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