ASTROSAT CZTI

Data Quality Report

Orbit 20491

Creation date: 2024-06-27T18:15:59.888592
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/AS1A05_115T01_9000003030_20491cztM0_level2.evt modeM0/AS1A05_115T01_9000003030_20491cztM0_level2_quad_clean.evt
Size (bytes)319,394,88044,605,440
Size304.6 MB 42.5 MB
Events in quadrant A1,905,575279,469
Events in quadrant B2,172,432281,675
Events in quadrant C1,990,827266,539
Events in quadrant D3,334,290243,229

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0800
B0800
C0800
D0800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0828410
B090354
C084108
D01265835

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3958220.555836%
B3961390.984600%
C3958471.187468%
D395542710.796460%

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 4997 3962 2 2 0.04% 0.05%
B 4996 3962 3 3 0.06% 0.08%
C 4996 3961 0 0 0.00% 0.00%
D 4996 3957 368 368 7.37% 9.30%

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 12 96 28332 281.53 488 477 98.9
A 0 226 4362 39.27 488 477 98.9
A 3 137 3912 34.72 488 477 98.9
B 0 189 96945 1010.37 489 477 95.5
B 0 197 71710 746.07 489 477 95.5
B 0 219 45773 474.42 489 477 95.5
C 3 233 91078 825.69 467 470 109.7
C 14 238 72607 657.37 467 470 109.7
C 0 207 4923 40.58 467 470 109.7
D 7 38 841234 7341.18 464 450 114.5
D 7 238 155545 1354.19 464 450 114.5
D 5 222 139956 1218.08 464 450 114.5

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