ASTROSAT CZTI

Data Quality Report

Orbit 20200531_A09_006T01_9000003700_level2

Creation date: 2021-01-10T23:06:41.308688
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_006T01_9000003700cztM0_level2_bc.evt modeM0/AS1A09_006T01_9000003700cztM0_level2_quad_clean.evt
Size (bytes)1,641,496,320450,737,280
Size1.5 GB 429.9 MB
Events in quadrant A7,551,2162,910,709
Events in quadrant B10,143,7822,866,563
Events in quadrant C8,584,5572,759,270
Events in quadrant D20,943,4002,604,927

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07380
B07380
C07380
D07380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0748230
B0856890
C0793810
D01175700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A365561710.467775%
B3655613263.627312%
C365566341.734325%
D3655623466.417551%

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 40816 36556 1 1 0.00% 0.00%
B 40816 36556 48 48 0.12% 0.13%
C 40816 36555 49 49 0.12% 0.13%
D 40816 36554 775 775 1.90% 2.12%

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 13 254 53587 121.71 1946 1910 424.6
A 13 170 21339 45.76 1946 1910 424.6
A 0 226 12343 24.57 1946 1910 424.6
B 3 64 2600254 7013.05 1921 1871 370.5
B 3 112 84681 223.5 1921 1871 370.5
B 0 190 39556 101.71 1921 1871 370.5
C 0 239 873294 2021.72 1832 1821 431.1
C 0 207 488527 1129.11 1832 1821 431.1
C 7 247 70325 158.92 1832 1821 431.1
D 8 195 7032074 16373.51 1846 1778 429.4
D 1 52 6432107 14976.19 1846 1778 429.4
D 2 234 156741 360.91 1846 1778 429.4

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