ASTROSAT CZTI

Data Quality Report

Orbit 18550

Creation date: 2024-06-27T17:51:27.490915
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_188T01_9000002756_18550cztM0_level2.evt modeM0/AS1A05_188T01_9000002756_18550cztM0_level2_quad_clean.evt
Size (bytes)1,465,364,160239,071,680
Size1.4 GB 228.0 MB
Events in quadrant A11,491,3341,502,750
Events in quadrant B9,816,6731,545,066
Events in quadrant C9,064,3261,492,521
Events in quadrant D12,748,0151,416,316

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0464434
B0411714
C0392294
D0506814

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1863610115.424984%
B186365893.160549%
C186364262.285898%
D1863613016.981112%

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 20741 18636 599 599 2.89% 3.21%
B 20741 18637 252 252 1.21% 1.35%
C 20741 18636 29 29 0.14% 0.16%
D 20741 18637 948 948 4.57% 5.09%

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 0 13 3018789 6788.8 2190 2141 444.4
A 13 254 29934 62.55 2190 2141 444.4
A 0 226 18835 37.57 2190 2141 444.4
B 12 18 532298 1252.56 2220 2165 423.2
B 3 64 214104 500.75 2220 2165 423.2
B 15 222 131400 305.35 2220 2165 423.2
C 9 54 380131 758.29 2138 2150 498.5
C 14 238 330379 658.48 2138 2150 498.5
C 3 233 22434 40.69 2138 2150 498.5
D 7 238 4433787 8587.23 2122 2058 516.1
D 1 52 136615 260.73 2122 2058 516.1
D 2 234 81083 153.12 2122 2058 516.1

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