ASTROSAT CZTI

Data Quality Report

Orbit 20210814_T04_036T01_9000004640_level2

Creation date: 2021-08-16T10:19:04.326847
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/AS1T04_036T01_9000004640cztM0_level2_bc.evt modeM0/AS1T04_036T01_9000004640cztM0_level2_quad_clean.evt
Size (bytes)495,918,720163,578,240
Size472.9 MB 156.0 MB
Events in quadrant A3,042,5111,112,602
Events in quadrant B4,875,7811,120,693
Events in quadrant C2,560,8631,065,734
Events in quadrant D3,913,7951,023,566

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0234750
B0285280
C0217900
D0271770

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01840
B01840
C01840
D01840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A91144975.453149%
B91142973.258723%
C91143764.125521%
D91146176.769805%

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 11714 9115 12 12 0.10% 0.13%
B 11714 9114 0 0 0.00% 0.00%
C 11714 9114 1 1 0.01% 0.01%
D 11714 9114 15 15 0.13% 0.16%

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 13 714459 5642.96 597 590 126.5
A 13 254 17253 131.71 597 590 126.5
A 13 6 13838 104.72 597 590 126.5
B 6 159 2387627 21429.43 596 586 111.4
B 5 172 53331 473.51 596 586 111.4
B 0 229 35076 309.63 596 586 111.4
C 0 10 241662 1831.92 567 568 131.6
C 10 22 34529 258.05 567 568 131.6
C 4 175 30700 228.95 567 568 131.6
D 8 195 822752 6499.44 575 561 126.5
D 12 218 332940 2627.46 575 561 126.5
D 13 249 301334 2377.62 575 561 126.5

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