ASTROSAT CZTI

Data Quality Report

Orbit 35781

Creation date: 2022-05-11T17:23:33.464255
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/AS1A09_121T01_9000005136_35781cztM0_level2.evt modeM0/AS1A09_121T01_9000005136_35781cztM0_level2_quad_clean.evt
Size (bytes)805,936,320168,367,680
Size768.6 MB 160.6 MB
Events in quadrant A4,916,7691,143,398
Events in quadrant B6,077,1401,132,468
Events in quadrant C5,007,5841,109,589
Events in quadrant D7,756,7481,047,328

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205583
B0240922
C0203712
D02958210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01980
B01980
C01980
D01980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9613130.135234%
B96132622.725476%
C9613680.707375%
D96123753.901373%

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 13258 9615 0 0 0.00% 0.00%
B 13258 9615 188 188 1.42% 1.96%
C 13258 9615 61 61 0.46% 0.63%
D 13258 9614 391 391 2.95% 4.07%

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 10 83 243123 1027.7 1175 1155 235.4
A 7 48 122920 517.17 1175 1155 235.4
A 13 6 18753 74.74 1175 1155 235.4
B 5 172 488961 2274.46 1142 1115 214.5
B 5 255 289935 1346.55 1142 1115 214.5
B 0 229 288773 1341.14 1142 1115 214.5
C 15 214 404944 1570.62 1121 1133 257.1
C 0 10 180000 695.7 1121 1133 257.1
C 15 159 12975 46.06 1121 1133 257.1
D 14 52 1468577 5320.19 1131 1103 275.8
D 13 249 421220 1523.09 1131 1103 275.8
D 2 249 300960 1087.1 1131 1103 275.8

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