ASTROSAT CZTI

Data Quality Report

Orbit 20210721_A10_094T25_9000004576_level2

Creation date: 2021-07-22T15:20:14.459671
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/AS1A10_094T25_9000004576cztM0_level2_bc.evt modeM0/AS1A10_094T25_9000004576cztM0_level2_quad_clean.evt
Size (bytes)275,091,84089,755,200
Size262.3 MB 85.6 MB
Events in quadrant A970,596624,133
Events in quadrant B3,119,008551,613
Events in quadrant C1,092,675609,498
Events in quadrant D2,808,759589,578

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100120
B0192300
C0106660
D0159070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4894861.757254%
B489498020.024520%
C48941533.126277%
D48941984.045770%

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 5334 4893 0 0 0.00% 0.00%
B 5334 4893 9 9 0.17% 0.18%
C 5334 4894 0 0 0.00% 0.00%
D 5334 4893 11 11 0.21% 0.22%

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 13 254 10169 175.64 249 244 56.5
A 12 16 3469 57.07 249 244 56.5
A 12 194 2165 33.99 249 244 56.5
B 6 159 1205170 26107.26 224 219 46.2
B 12 1 919053 19908.06 224 219 46.2
B 5 172 36572 787.65 224 219 46.2
C 3 233 131558 2174.17 242 240 60.4
C 14 254 9719 156.94 242 240 60.4
C 2 114 9377 151.28 242 240 60.4
D 1 52 712685 11934.58 246 238 59.7
D 12 218 505561 8464.93 246 238 59.7
D 8 195 426852 7146.44 246 238 59.7

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