ASTROSAT CZTI

Data Quality Report

Orbit 20220201_A05_084T04_9000004896_level2

Creation date: 2022-02-02T10:00:12.211511
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/AS1A05_084T04_9000004896cztM0_level2_bc.evt modeM0/AS1A05_084T04_9000004896cztM0_level2_quad_clean.evt
Size (bytes)539,778,240106,954,560
Size514.8 MB 102.0 MB
Events in quadrant A1,598,381734,063
Events in quadrant B2,642,240721,166
Events in quadrant C1,845,903727,404
Events in quadrant D9,780,669569,542

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148140
B0186270
C0148820
D0415050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6975550.788530%
B69752042.924731%
C6975270.387097%
D6975261237.448029%

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 8649 6976 8 8 0.09% 0.11%
B 8648 6974 26 26 0.30% 0.37%
C 8648 6974 3 3 0.03% 0.04%
D 8648 6974 1398 1398 16.17% 20.05%

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 9 143 130472 1570.71 361 354 82.8
A 13 6 33514 400.29 361 354 82.8
A 10 83 30548 364.49 361 354 82.8
B 5 31 281063 3790.75 358 350 74.1
B 5 172 259916 3505.18 358 350 74.1
B 0 229 212047 2858.76 358 350 74.1
C 15 214 284835 3405.11 354 351 83.5
C 14 254 65365 778.18 354 351 83.5
C 0 10 26302 310.62 354 351 83.5
D 12 227 4686634 58298.11 305 299 80.4
D 1 52 972551 12094.84 305 299 80.4
D 8 195 922779 11475.67 305 299 80.4

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