ASTROSAT CZTI

Data Quality Report

Orbit 20876

Creation date: 2024-06-27T18:20:38.655946
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/AS1A06_002T03_9000003080_20876cztM0_level2.evt modeM0/AS1A06_002T03_9000003080_20876cztM0_level2_quad_clean.evt
Size (bytes)189,233,28029,056,320
Size180.5 MB 27.7 MB
Events in quadrant A1,311,776176,590
Events in quadrant B1,460,517178,269
Events in quadrant C1,347,840173,818
Events in quadrant D1,436,187168,440

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A053721
B058471
C054991
D057901

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2533632.487169%
B2533652.566127%
C2533742.921437%
D2533481.894986%

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 2928 2534 0 0 0.00% 0.00%
B 2928 2534 2 2 0.07% 0.08%
C 2928 2534 0 0 0.00% 0.00%
D 2928 2534 7 7 0.24% 0.28%

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 3 137 2951 37.28 340 332 70.3
A 0 226 2916 36.78 340 332 70.3
A 12 194 2428 29.83 340 332 70.3
B 7 220 72339 1059.21 337 327 68.0
B 0 230 34197 498.19 337 327 68.0
B 12 111 8068 113.86 337 327 68.0
C 14 238 51620 648.05 328 329 79.1
C 10 91 13197 162.58 328 329 79.1
C 13 61 2324 25.21 328 329 79.1
D 1 52 71216 855.55 334 323 82.9
D 1 20 47726 572.07 334 323 82.9
D 13 153 28144 335.75 334 323 82.9

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