ASTROSAT CZTI

Data Quality Report

Orbit 57221

Creation date: 2026-04-30T10:17:19.605632
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/AS1A14_070T08_9000006568_57221cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57221cztM0_level2_quad_clean.evt
Size (bytes)479,900,16087,171,840
Size457.7 MB 83.1 MB
Events in quadrant A3,194,666580,117
Events in quadrant B3,541,064615,842
Events in quadrant C7,048,846476,300
Events in quadrant D3,458,565499,727

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145722
B0153532
C0256752
D0153752

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6703991.476951%
B67032163.222438%
C6703116217.335521%
D67021462.178454%

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 7894 6980 54 54 0.68% 0.77%
B 7894 6980 81 81 1.03% 1.16%
C 7894 6978 915 915 11.59% 13.11%
D 7893 6979 102 102 1.29% 1.46%

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 3 95 342529 1944.35 712 695 175.8
A 10 251 50689 284.37 712 695 175.8
A 3 14 15107 81.98 712 695 175.8
B 10 16 285624 1902.54 702 677 149.8
B 5 185 261580 1742.0 702 677 149.8
B 0 155 38976 255.72 702 677 149.8
C 15 224 4115614 23817.31 637 630 172.8
C 12 254 216783 1251.08 637 630 172.8
C 14 254 94192 541.53 637 630 172.8
D 8 240 205343 1063.99 678 646 192.4
D 9 102 180348 934.07 678 646 192.4
D 3 176 108528 560.76 678 646 192.4

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