ASTROSAT CZTI

Data Quality Report

Orbit 20210813_A10_109T01_9000004638_level2

Creation date: 2021-08-16T13:06:12.013060
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_109T01_9000004638cztM0_level2_bc.evt modeM0/AS1A10_109T01_9000004638cztM0_level2_quad_clean.evt
Size (bytes)4,116,827,5201,315,969,920
Size3.8 GB 1.2 GB
Events in quadrant A22,685,5918,759,908
Events in quadrant B42,234,4568,727,921
Events in quadrant C23,059,9848,421,011
Events in quadrant D30,989,6178,190,898

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01912390
B02587680
C01972590
D02161000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017140
B017140
C017140
D017140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8407517462.076717%
B8407520192.401427%
C8407527033.214987%
D8407415111.797226%

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 98560 84082 90 90 0.09% 0.11%
B 98560 84075 25 25 0.03% 0.03%
C 98560 84075 36 36 0.04% 0.04%
D 98560 84076 113 113 0.11% 0.13%

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 3102705 2814.07 5043 4971 1100.8
A 13 254 145333 127.51 5043 4971 1100.8
A 14 238 105414 91.25 5043 4971 1100.8
B 6 159 21489215 22288.65 5034 4962 963.9
B 0 229 538847 553.87 5034 4962 963.9
B 4 80 320297 327.14 5034 4962 963.9
C 0 10 2732437 2353.25 4839 4864 1159.1
C 3 233 1201549 1032.46 4839 4864 1159.1
C 4 175 174244 146.13 4839 4864 1159.1
D 8 195 9065336 7981.47 4937 4807 1135.2
D 12 218 1774782 1559.18 4937 4807 1135.2
D 2 250 540807 472.16 4937 4807 1135.2

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