ASTROSAT CZTI

Data Quality Report

Orbit 20200814_A09_044T02_9000003814_level2

Creation date: 2021-01-09T05:40:43.647476
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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_044T02_9000003814cztM0_level2_bc.evt modeM0/AS1A09_044T02_9000003814cztM0_level2_quad_clean.evt
Size (bytes)1,269,080,640386,916,480
Size1.2 GB 369.0 MB
Events in quadrant A7,218,3912,445,991
Events in quadrant B7,224,6712,510,430
Events in quadrant C8,719,6762,330,146
Events in quadrant D13,092,9962,238,473

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0686630
B0684970
C0748790
D0894120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06500
B06500
C06500
D06500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A319166331.983331%
B319165741.798471%
C3191611093.474746%
D3191617615.517609%

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 36356 31917 20 20 0.06% 0.06%
B 36356 31917 0 0 0.00% 0.00%
C 36356 31916 34 34 0.09% 0.11%
D 36356 31916 286 286 0.79% 0.90%

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 13 505460 1339.17 1737 1707 376.2
A 13 254 50369 129.36 1737 1707 376.2
A 0 226 10888 24.41 1737 1707 376.2
B 0 230 195537 571.91 1773 1726 338.9
B 0 244 185033 540.91 1773 1726 338.9
B 0 245 65169 187.21 1773 1726 338.9
C 3 233 1976420 5044.93 1660 1650 391.4
C 2 16 348758 886.75 1660 1650 391.4
C 0 207 18437 42.89 1660 1650 391.4
D 1 52 4337883 11328.77 1651 1604 382.8
D 7 80 1817599 4744.39 1651 1604 382.8
D 12 233 391512 1018.66 1651 1604 382.8

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