ASTROSAT CZTI

Data Quality Report

Orbit 20220121_A11_054T07_9000004878_level2

Creation date: 2022-01-22T16:10:41.197741
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/AS1A11_054T07_9000004878cztM0_level2_bc.evt modeM0/AS1A11_054T07_9000004878cztM0_level2_quad_clean.evt
Size (bytes)2,044,463,040643,639,680
Size1.9 GB 613.8 MB
Events in quadrant A9,233,4094,153,222
Events in quadrant B15,360,8844,222,635
Events in quadrant C14,064,1754,137,693
Events in quadrant D20,204,2243,902,724

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09140
B09140
C09140
D09140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0907770
B01181720
C01033250
D01258980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01570
B01570
C01570
D01570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A44875360.080223%
B4487520794.632869%
C448758241.836212%
D4487510032.235097%

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 59472 44878 0 0 0.00% 0.00%
B 59472 44874 47 47 0.08% 0.10%
C 59472 44874 162 162 0.27% 0.36%
D 59472 44874 228 228 0.38% 0.51%

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 107630 204.4 2326 2284 515.4
A 13 6 86723 163.84 2326 2284 515.4
A 13 254 76699 144.39 2326 2284 515.4
B 5 31 2322233 5010.4 2333 2283 463.0
B 5 15 1307093 2818.0 2333 2283 463.0
B 5 255 1047113 2256.52 2333 2283 463.0
C 0 10 2463898 4737.43 2271 2256 519.6
C 15 214 1798593 3457.05 2271 2256 519.6
C 0 239 517577 991.74 2271 2256 519.6
D 8 195 7486135 13669.83 2265 2191 547.5
D 8 230 754468 1374.07 2265 2191 547.5
D 10 118 482563 877.43 2265 2191 547.5

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