ASTROSAT CZTI

Data Quality Report

Orbit 20160728_G05_083T03_9000000566_level2

Creation date: 2021-08-24T12:06:24.905568
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1G05_083T03_9000000566cztM0_level2_bc.evt modeM0/AS1G05_083T03_9000000566cztM0_level2_quad_clean.evt
Size (bytes)2,022,796,800609,891,840
Size1.9 GB 581.6 MB
Events in quadrant A14,159,6453,844,620
Events in quadrant B16,085,1693,819,803
Events in quadrant C11,205,5743,873,071
Events in quadrant D16,585,9373,687,727

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09640
B09640
C09640
D09640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01138770
B01232500
C01039040
D01236280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4732020564.344886%
B4731826005.494738%
C473208561.808960%
D4732022834.824598%

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 60885 47322 317 317 0.52% 0.67%
B 60885 47322 132 132 0.22% 0.28%
C 60885 47322 125 125 0.21% 0.26%
D 60885 47323 245 245 0.40% 0.52%

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 0 31 1879777 3633.21 2340 2290 516.8
A 0 13 1317276 2544.69 2340 2290 516.8
A 0 118 1037390 2003.07 2340 2290 516.8
B 10 16 5021621 11200.9 2335 2268 448.1
B 15 204 867807 1931.49 2335 2268 448.1
B 8 3 254239 562.28 2335 2268 448.1
C 9 247 1224360 2370.59 2318 2283 515.5
C 9 54 732319 1416.13 2318 2283 515.5
C 14 48 88680 167.59 2318 2283 515.5
D 14 34 3203402 5914.36 2308 2217 541.3
D 10 40 1233295 2274.48 2308 2217 541.3
D 13 235 903899 1665.9 2308 2217 541.3

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