ASTROSAT CZTI

Data Quality Report

Orbit 20200115_A08_004T03_9000003438_level2

Creation date: 2020-01-20T13:28:47.941025
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/AS1A08_004T03_9000003438cztM0_level2_bc.evt modeM0/AS1A08_004T03_9000003438cztM0_level2_quad_clean.evt
Size (bytes)4,724,308,8001,734,105,600
Size4.4 GB 1.6 GB
Events in quadrant A28,026,69711,102,210
Events in quadrant B28,931,94611,253,012
Events in quadrant C31,464,11110,588,807
Events in quadrant D45,474,29710,346,936

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02190
B02180
C02190
D02190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02787550
B02813260
C02938770
D03385170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027360
B027400
C027360
D027380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13480712280.910932%
B13480415971.184683%
C13481328122.085852%
D13479542113.124003%

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 156783 134848 4 4 0.00% 0.00%
B 156783 134827 19 19 0.01% 0.01%
C 156783 134843 219 219 0.14% 0.16%
D 156783 134810 733 733 0.47% 0.54%

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 6 16 222839 138.83 7189 7056 1554.3
A 13 254 195650 121.34 7189 7056 1554.3
A 0 226 46121 25.13 7189 7056 1554.3
B 3 64 300830 215.93 7252 7075 1360.4
B 0 229 178751 126.19 7252 7075 1360.4
B 0 190 150772 105.63 7252 7075 1360.4
C 10 9 2466182 1530.62 6863 6841 1606.8
C 0 207 801899 494.82 6863 6841 1606.8
C 0 239 648345 399.25 6863 6841 1606.8
D 1 52 11258095 6929.84 7010 6770 1623.6
D 7 238 1977669 1213.9 7010 6770 1623.6
D 2 152 1327499 813.45 7010 6770 1623.6

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