ASTROSAT CZTI

Data Quality Report

Orbit 01876

Creation date: 2024-06-27T14:13:08.174589
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/AS1T01_052T01_9000000308_01876cztM0_level2.evt modeM0/AS1T01_052T01_9000000308_01876cztM0_level2_quad_clean.evt
Size (bytes)1,046,952,00078,704,640
Size998.5 MB 75.1 MB
Events in quadrant A8,922,341482,980
Events in quadrant B7,865,823495,087
Events in quadrant C7,386,930485,847
Events in quadrant D7,100,705465,707

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0311098
B0279621
C0265691
D0257371

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B110
C1-1-1
D1-1-1

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6496100.153941%
B6498150.230840%
C649850.076947%
D6498300.461681%

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 7433 6498 355 355 4.78% 5.46%
B 7433 6499 178 178 2.39% 2.74%
C 7433 6499 103 103 1.39% 1.58%
D 7433 6499 164 164 2.21% 2.52%

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 0 231 1378955 2905.09 1967 1983 474.0
A 0 128 20111 38.25 1967 1983 474.0
A 8 255 8868 14.53 1967 1983 474.0
B 5 189 15860 28.63 2061 2071 481.6
B 0 220 15281 27.43 2061 2071 481.6
B 0 187 14603 26.02 2061 2071 481.6
C 14 223 12046 19.17 1885 1957 526.2
C 10 82 11808 18.72 1885 1957 526.2
C 10 34 10502 16.24 1885 1957 526.2
D 13 53 177256 312.42 1821 1891 561.3
D 1 83 44038 75.09 1821 1891 561.3
D 10 199 29100 48.47 1821 1891 561.3

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