ASTROSAT CZTI

Data Quality Report

Orbit 35940

Creation date: 2022-06-09T03:36:09.606499
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/AS1A11_080T01_9000005146_35940cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35940cztM0_level2_quad_clean.evt
Size (bytes)454,518,72078,137,280
Size433.5 MB 74.5 MB
Events in quadrant A2,696,830517,743
Events in quadrant B4,372,612490,587
Events in quadrant C3,192,940499,466
Events in quadrant D3,138,009482,157

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0320

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0112123
B0163952
C0126572
D0127452

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5368130.242176%
B536856710.562593%
C53681292.403130%
D5368611.136364%

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 7221 5369 1 1 0.01% 0.02%
B 7221 5369 422 422 5.84% 7.86%
C 7221 5369 101 101 1.40% 1.88%
D 7221 5369 38 38 0.53% 0.71%

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 10 83 164132 1235.51 650 640 132.3
A 13 6 12437 89.15 650 640 132.3
A 13 254 8410 58.72 650 640 132.3
B 5 172 1387412 11703.56 613 600 118.5
B 4 171 429619 3620.57 613 600 118.5
B 0 213 73438 614.69 613 600 118.5
C 0 207 280758 1944.61 616 623 144.1
C 15 214 224347 1553.02 616 623 144.1
C 0 10 197631 1367.57 616 623 144.1
D 8 195 337318 2242.25 619 603 150.2
D 13 249 206019 1367.9 619 603 150.2
D 1 52 116413 771.2 619 603 150.2

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