ASTROSAT CZTI

Data Quality Report

Orbit 17768

Creation date: 2024-06-27T17:40:39.108924
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_015T01_9000002650_17768cztM0_level2.evt modeM0/AS1A05_015T01_9000002650_17768cztM0_level2_quad_clean.evt
Size (bytes)1,968,042,240304,562,880
Size1.8 GB 290.5 MB
Events in quadrant A12,190,7691,916,321
Events in quadrant B12,673,8941,935,463
Events in quadrant C14,111,8491,840,714
Events in quadrant D18,904,9441,777,877

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0535484
B0542674
C0583654
D0736154

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A254768733.426755%
B254768513.340399%
C2547514145.550540%
D25475262010.284593%

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 27281 25478 74 74 0.27% 0.29%
B 27281 25479 47 47 0.17% 0.18%
C 27280 25478 332 332 1.22% 1.30%
D 27280 25477 1632 1632 5.98% 6.41%

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 15 174 382490 610.31 3072 2997 621.8
A 0 226 26799 38.28 3072 2997 621.8
A 3 137 23599 33.13 3072 2997 621.8
B 7 220 275772 463.89 3067 2980 588.1
B 0 219 101589 167.69 3067 2980 588.1
B 15 35 76844 125.61 3067 2980 588.1
C 4 254 1936356 2834.21 2915 2929 682.2
C 14 238 442981 645.07 2915 2929 682.2
C 5 218 213974 309.37 2915 2929 682.2
D 7 238 5564851 8059.32 2896 2825 690.1
D 1 52 943704 1363.32 2896 2825 690.1
D 2 165 478557 689.33 2896 2825 690.1

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