ASTROSAT CZTI

Data Quality Report

Orbit 51508

Creation date: 2025-04-06T20:10:56.356807
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/AS1A13_090T01_9000006458_51508cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51508cztM0_level2_quad_clean.evt
Size (bytes)672,664,32087,880,320
Size641.5 MB 83.8 MB
Events in quadrant A5,091,739572,355
Events in quadrant B5,237,334629,484
Events in quadrant C4,039,248578,392
Events in quadrant D10,030,273428,676

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193741
B0199891
C0164131
D0343129

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64756319.745174%
B64765618.662755%
C64763835.914145%
D6475187128.895753%

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 7495 6476 504 504 6.72% 7.78%
B 7496 6477 309 309 4.12% 4.77%
C 7496 6477 272 272 3.63% 4.20%
D 7495 6476 1987 1987 26.51% 30.68%

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 12 250 970554 5702.21 695 678 170.1
A 8 43 405258 2378.65 695 678 170.1
A 7 64 402835 2364.41 695 678 170.1
B 2 208 938239 6292.31 692 669 149.0
B 5 172 726497 4871.25 692 669 149.0
B 15 52 308594 2066.58 692 669 149.0
C 12 252 461007 2471.05 681 673 186.3
C 15 1 418888 2244.96 681 673 186.3
C 13 3 153139 818.43 681 673 186.3
D 8 176 4155716 24366.22 613 594 170.5
D 11 176 2410157 14130.02 613 594 170.5
D 8 192 295346 1728.47 613 594 170.5

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