ASTROSAT CZTI

Data Quality Report

Orbit 20180621_A04_022T06_9000002182_level2

Creation date: 2018-06-28T16:02:11.804173
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_022T06_9000002182cztM0_level2_bc.evt modeM0/AS1A04_022T06_9000002182cztM0_level2_quad_clean.evt
Size (bytes)5,152,939,2001,539,331,200
Size4.8 GB 1.4 GB
Events in quadrant A46,829,4959,658,899
Events in quadrant B30,727,7799,818,492
Events in quadrant C38,293,5699,482,140
Events in quadrant D32,079,5259,478,129

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024300
B024300
C024300
D024300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03232330
B02684000
C02977820
D02688470

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02220
B02220
C02220
D02220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11946376296.386078%
B11948822071.847047%
C11948851474.307546%
D11948818541.551620%

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 141414 119468 857 857 0.61% 0.72%
B 141414 119490 82 82 0.06% 0.07%
C 141414 119494 93 93 0.07% 0.08%
D 141413 119490 180 180 0.13% 0.15%

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 8 15 15483687 11360.24 6284 6175 1362.4
A 14 237 3761153 2756.09 6284 6175 1362.4
A 12 189 2112362 1545.91 6284 6175 1362.4
B 0 219 1130686 942.13 6389 6235 1193.5
B 3 64 1116438 930.19 6389 6235 1193.5
B 10 16 741133 615.74 6389 6235 1193.5
C 4 254 7548683 5742.87 6056 5986 1313.4
C 3 233 6323359 4809.93 6056 5986 1313.4
C 0 207 447323 336.03 6056 5986 1313.4
D 5 222 3346418 2142.55 6256 6084 1559.0
D 8 195 1309485 836.02 6256 6084 1559.0
D 15 0 832105 529.82 6256 6084 1559.0

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