ASTROSAT CZTI

Data Quality Report

Orbit 20201019_A09_038T12_9000003926_level2

Creation date: 2021-01-07T17:27:29.201543
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_038T12_9000003926cztM0_level2_bc.evt modeM0/AS1A09_038T12_9000003926cztM0_level2_quad_clean.evt
Size (bytes)445,248,000180,290,880
Size424.6 MB 171.9 MB
Events in quadrant A2,181,9181,261,598
Events in quadrant B2,247,9401,280,089
Events in quadrant C3,152,5511,194,887
Events in quadrant D5,330,7581,148,031

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0185320
B0188030
C0229190
D0284400

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01680
B01680
C01680
D01680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82891391.676921%
B82892022.436965%
C82896277.564242%
D8289130915.792014%

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 10829 8290 0 0 0.00% 0.00%
B 10829 8288 1 1 0.01% 0.01%
C 10829 8287 76 76 0.70% 0.92%
D 10829 8288 752 752 6.94% 9.07%

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 12657 103.39 560 555 117.0
A 8 192 9715 78.25 560 555 117.0
A 15 174 5692 43.88 560 555 117.0
B 15 32 43992 420.47 561 555 103.3
B 0 190 19713 185.45 561 555 103.3
B 7 205 13365 124.0 561 555 103.3
C 2 16 1072349 8738.49 525 527 122.7
C 15 208 63466 513.14 525 527 122.7
C 13 61 2969 19.91 525 527 122.7
D 1 52 3038823 25673.71 517 508 118.3
D 2 250 106638 896.8 517 508 118.3
D 10 103 78865 662.12 517 508 118.3

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