ASTROSAT CZTI

Data Quality Report

Orbit 20181231_T03_071T01_9000002610_level2

Creation date: 2019-01-01T16:56:53.168634
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/AS1T03_071T01_9000002610cztM0_level2_bc.evt modeM0/AS1T03_071T01_9000002610cztM0_level2_quad_clean.evt
Size (bytes)2,369,859,840823,308,480
Size2.2 GB 785.2 MB
Events in quadrant A14,269,6475,250,464
Events in quadrant B13,692,4715,280,427
Events in quadrant C17,112,9115,017,368
Events in quadrant D22,292,1834,956,349

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013180
B013180
C013180
D013180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01368960
B01344750
C01464950
D01632640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A646456881.064274%
B646456751.044164%
C6464510671.650553%
D6464515962.468868%

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 74780 64645 6 6 0.01% 0.01%
B 74780 64640 3 3 0.00% 0.00%
C 74780 64644 8 8 0.01% 0.01%
D 74780 64645 73 73 0.10% 0.11%

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 14 237 1209345 1639.82 3398 3337 735.5
A 15 191 26139 31.0 3398 3337 735.5
A 0 226 22467 26.01 3398 3337 735.5
B 0 230 138484 211.43 3400 3315 639.3
B 0 189 108931 165.21 3400 3315 639.3
B 4 80 93561 141.16 3400 3315 639.3
C 3 233 3954279 5283.26 3212 3189 747.9
C 0 207 390776 518.27 3212 3189 747.9
C 5 218 326592 432.44 3212 3189 747.9
D 12 144 4483999 5866.91 3299 3184 763.7
D 1 52 3378983 4420.07 3299 3184 763.7
D 13 189 739726 964.38 3299 3184 763.7

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