ASTROSAT CZTI

Data Quality Report

Orbit 31144

Creation date: 2024-06-27T20:23:53.069858
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/AS1A10_071T66_9000004498_31144cztM0_level2.evt modeM0/AS1A10_071T66_9000004498_31144cztM0_level2_quad_clean.evt
Size (bytes)1,605,585,600215,798,400
Size1.5 GB 205.8 MB
Events in quadrant A8,326,0271,386,633
Events in quadrant B13,665,9361,374,022
Events in quadrant C8,943,3381,335,614
Events in quadrant D16,514,9381,235,034

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0358654
B0533444
C0373274
D0616074

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03560
B03560
C03560
D03560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A174702081.190612%
B174693852.203904%
C174693602.060793%
D1746913267.590589%

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 19230 17473 2 2 0.01% 0.01%
B 19229 17472 11 11 0.06% 0.06%
C 19229 17471 33 33 0.17% 0.19%
D 19229 17472 943 943 4.90% 5.40%

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 13 254 33495 73.2 2141 2094 429.0
A 11 47 28658 61.93 2141 2094 429.0
A 12 96 23877 50.78 2141 2094 429.0
B 6 159 4821746 11768.5 2110 2051 409.5
B 0 183 219809 531.71 2110 2051 409.5
B 0 190 150509 362.5 2110 2051 409.5
C 14 238 325986 670.68 2046 2055 483.0
C 0 10 239568 491.76 2046 2055 483.0
C 3 233 193678 396.74 2046 2055 483.0
D 8 195 5948550 11783.77 2003 1957 504.6
D 13 174 1417960 2805.95 2003 1957 504.6
D 2 250 870575 1721.25 2003 1957 504.6

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