ASTROSAT CZTI

Data Quality Report

Orbit 20200731_A09_012T02_9000003780_level2

Creation date: 2021-01-09T14:16:10.723500
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_012T02_9000003780cztM0_level2_bc.evt modeM0/AS1A09_012T02_9000003780cztM0_level2_quad_clean.evt
Size (bytes)1,077,560,640588,375,360
Size1.0 GB 561.1 MB
Events in quadrant A6,195,0313,989,873
Events in quadrant B7,041,0424,082,016
Events in quadrant C6,483,2274,013,125
Events in quadrant D11,057,7213,868,420

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0564220
B0598940
C0586090
D0738560

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05540
B05540
C05540
D05540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0650
B0650
C0650
D0650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A272091030.378551%
B272091760.646845%
C272093971.459076%
D2720910193.745084%

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 33639 27211 0 0 0.00% 0.00%
B 33639 27209 0 0 0.00% 0.00%
C 33639 27209 0 0 0.00% 0.00%
D 33639 27209 182 182 0.54% 0.67%

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 40186 114.27 1604 1583 337.8
A 0 13 12305 31.74 1604 1583 337.8
A 0 226 10430 26.19 1604 1583 337.8
B 3 112 400717 1343.91 1626 1596 297.0
B 0 190 265924 890.04 1626 1596 297.0
B 0 230 151017 503.13 1626 1596 297.0
C 3 233 217521 570.21 1603 1606 378.7
C 2 16 91728 238.0 1603 1606 378.7
C 0 10 13499 31.41 1603 1606 378.7
D 1 52 4658147 12759.79 1592 1557 364.9
D 2 234 115465 312.13 1592 1557 364.9
D 12 233 85338 229.57 1592 1557 364.9

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