ASTROSAT CZTI

Data Quality Report

Orbit 20220501_A11_106T01_9000005102_level2

Creation date: 2026-01-02T11:15:15.286999
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_106T01_9000005102cztM0_level2.fits modeM0/AS1A11_106T01_9000005102cztM0_level2_quad_clean.evt
Size (bytes)620,000,640533,329,920
Size591.3 MB 508.6 MB
Events in quadrant A2,141,19633,173
Events in quadrant B3,980,1803,883,310
Events in quadrant C4,094,0523,805,257
Events in quadrant D3,611,5703,514,205

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014640
B014640
C014640
D014640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05701690
B01736570
C01702870
D01602600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02610
B02610
C02610
D02610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A716407113699.296482%
B7167120622.877035%
C7166816612.317631%
D716617531.050781%

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 97015 71673 0 0 0.00% 0.00%
B 97016 71676 0 0 0.00% 0.00%
C 97016 71652 0 0 0.00% 0.00%
D 97016 71669 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 7 110 1761 8.84 558 524 139.9
A 9 19 1738 8.68 558 524 139.9
A 0 29 1666 8.16 558 524 139.9
B 2 9 3465 11.77 1049 999 209.5
B 3 80 3107 10.06 1049 999 209.5
B 2 8 2931 9.22 1049 999 209.5
C 1 81 3474 8.77 1082 1014 280.6
C 1 80 3429 8.61 1082 1014 280.6
C 3 203 3204 7.8 1082 1014 280.6
D 3 14 2599 6.05 1031 941 274.1
D 10 189 2598 6.04 1031 941 274.1
D 1 3 2591 6.02 1031 941 274.1

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