ASTROSAT CZTI

Data Quality Report

Orbit 20160128_G02_021T11_9000000300_level2

Creation date: 2025-10-26T01:42:23.653113
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/AS1G02_021T11_9000000300cztM0_level2.fits modeM0/AS1G02_021T11_9000000300cztM0_level2_quad_clean.evt
Size (bytes)177,825,600193,078,080
Size169.6 MB 184.1 MB
Events in quadrant A1,036,1841,129,941
Events in quadrant B1,032,4121,165,550
Events in quadrant C1,019,4141,124,558
Events in quadrant D884,9761,014,249

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0894820
B0883440
C0826110
D0822100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A1139649767860264139646566662190
B1139649767860264139646566662190
C1139649767860264139646566662190
D1139649767860264139646566662190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04120
B04120
C04120
D04120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A205051120.546208%
B205071120.546155%
C20508630.307197%
D205102161.053145%

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 25274 20512 0 0 0.00% 0.00%
B 25274 20515 0 0 0.00% 0.00%
C 25274 20514 0 0 0.00% 0.00%
D 25274 20515 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 29 918 10.37 268 251 64.3
A 7 110 918 10.37 268 251 64.3
A 14 79 765 7.99 268 251 64.3
B 2 9 787 10.26 272 259 51.5
B 5 128 695 8.47 272 259 51.5
B 10 225 649 7.58 272 259 51.5
C 12 241 760 7.58 268 249 67.4
C 2 127 688 6.51 268 249 67.4
C 9 242 686 6.48 268 249 67.4
D 6 231 655 7.03 252 231 60.3
D 1 19 649 6.93 252 231 60.3
D 3 30 640 6.78 252 231 60.3

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