ASTROSAT CZTI

Data Quality Report

Orbit 20180421_A04_115T02_9000002042_level2

Creation date: 2018-04-23T21:31:20.780431
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/AS1A04_115T02_9000002042cztM0_level2_bc.evt modeM0/AS1A04_115T02_9000002042cztM0_level2_quad_clean.evt
Size (bytes)3,375,354,2401,160,046,720
Size3.1 GB 1.1 GB
Events in quadrant A20,715,5367,266,645
Events in quadrant B19,559,9457,357,358
Events in quadrant C19,240,6947,267,622
Events in quadrant D36,413,0836,911,960

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018880
B018880
C018880
D018880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01984530
B01938450
C01911460
D02475760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01230
B01230
C01230
D01230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9239216491.784787%
B9239217251.867045%
C9239210431.128886%
D9239236833.986276%

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 104789 92381 69 69 0.07% 0.07%
B 104789 92377 8 8 0.01% 0.01%
C 104789 92381 6 6 0.01% 0.01%
D 104789 92382 706 706 0.67% 0.76%

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 23 2537035 2453.26 4663 4553 1032.3
A 0 226 179131 169.12 4663 4553 1032.3
A 1 162 97081 89.63 4663 4553 1032.3
B 0 214 400762 439.24 4701 4557 902.0
B 10 244 383876 420.52 4701 4557 902.0
B 4 80 364329 398.85 4701 4557 902.0
C 3 233 1043538 1009.02 4614 4540 1029.7
C 14 220 62654 56.44 4614 4540 1029.7
C 14 234 40037 34.47 4614 4540 1029.7
D 10 157 10674408 10071.68 4534 4390 1059.4
D 5 222 3863992 3643.17 4534 4390 1059.4
D 1 52 1616272 1521.49 4534 4390 1059.4

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