ASTROSAT CZTI

Data Quality Report

Orbit 18175

Creation date: 2024-06-27T17:46:13.005678
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_063T02_9000002708_18175cztM0_level2.evt modeM0/AS1A05_063T02_9000002708_18175cztM0_level2_quad_clean.evt
Size (bytes)1,673,426,880286,240,320
Size1.6 GB 273.0 MB
Events in quadrant A11,218,1081,787,030
Events in quadrant B11,293,0971,816,838
Events in quadrant C11,276,5181,761,226
Events in quadrant D15,332,0891,715,074

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490384
B0486604
C0485474
D0614764

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04700
B04700
C04700
D04700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A230972280.987141%
B230973611.562974%
C230973191.381132%
D230989314.030652%

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 26193 23101 30 30 0.11% 0.13%
B 26193 23101 127 127 0.48% 0.55%
C 26193 23101 31 31 0.12% 0.13%
D 26194 23102 570 570 2.18% 2.47%

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 556732 991.97 2760 2702 558.5
A 4 2 40931 68.45 2760 2702 558.5
A 0 226 24159 38.42 2760 2702 558.5
B 4 171 323452 612.22 2744 2673 524.0
B 10 247 148008 277.38 2744 2673 524.0
B 12 111 63826 116.71 2744 2673 524.0
C 4 254 514517 828.34 2639 2653 617.9
C 14 238 408341 656.52 2639 2653 617.9
C 3 233 43542 66.17 2639 2653 617.9
D 7 238 4427867 6806.46 2658 2580 650.2
D 1 52 244091 371.46 2658 2580 650.2
D 10 70 213593 324.55 2658 2580 650.2

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