ASTROSAT CZTI

Data Quality Report

Orbit 35961

Creation date: 2022-06-09T06:01:19.441643
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_35961cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35961cztM0_level2_quad_clean.evt
Size (bytes)841,659,84069,050,880
Size802.7 MB 65.9 MB
Events in quadrant A3,332,280515,246
Events in quadrant B13,890,172213,868
Events in quadrant C3,635,100496,513
Events in quadrant D4,252,481470,425

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133573
B0450642
C0141202
D0164552

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A56211081.921366%
B5621550497.918520%
C56211823.237858%
D56212574.572140%

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 7083 5622 49 49 0.69% 0.87%
B 7083 5621 5271 5271 74.42% 93.77%
C 7083 5622 121 121 1.71% 2.15%
D 7083 5622 228 228 3.22% 4.06%

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 15 169 548542 3950.91 672 660 138.7
A 10 83 173889 1249.2 672 660 138.7
A 13 254 9077 60.7 672 660 138.7
B 5 14 3656232 59790.63 307 300 61.1
B 5 31 3647939 59655.0 307 300 61.1
B 5 15 3635248 59447.45 307 300 61.1
C 9 187 505214 3340.1 644 650 151.1
C 15 214 235073 1551.83 644 650 151.1
C 0 10 205403 1355.42 644 650 151.1
D 2 249 534600 3361.01 643 625 158.9
D 8 195 488716 3072.2 643 625 158.9
D 7 223 204436 1282.85 643 625 158.9

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