ASTROSAT CZTI

Data Quality Report

Orbit 56550

Creation date: 2026-03-12T03:53:30.612410
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_060T01_9000006556_56550cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56550cztM0_level2_quad_clean.evt
Size (bytes)394,660,80095,163,840
Size376.4 MB 90.8 MB
Events in quadrant A3,257,503625,995
Events in quadrant B3,964,555664,922
Events in quadrant C3,347,975600,914
Events in quadrant D3,551,031552,036

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140812
B0160092
C0143902
D0148772

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6270781.244019%
B62713014.799872%
C62711041.658428%
D62701532.440191%

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 7470 6271 69 69 0.92% 1.10%
B 7471 6272 121 121 1.62% 1.93%
C 7471 6272 83 83 1.11% 1.32%
D 7470 6271 134 134 1.79% 2.14%

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 4 95 276215 1586.8 699 680 173.6
A 11 31 85573 488.9 699 680 173.6
A 4 249 41722 236.36 699 680 173.6
B 4 206 639513 4320.9 691 668 147.8
B 5 185 145085 976.78 691 668 147.8
B 10 247 82368 552.59 691 668 147.8
C 13 3 328861 1749.25 679 673 187.6
C 9 38 147376 781.93 679 673 187.6
C 14 254 105539 558.94 679 673 187.6
D 2 120 360851 1900.34 664 635 189.6
D 11 129 99866 523.5 664 635 189.6
D 2 249 77435 405.16 664 635 189.6

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