ASTROSAT CZTI

Data Quality Report

Orbit 38858

Creation date: 2024-06-27T21:57:20.908117
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/AS1A12_077T06_9000005408_38858cztM0_level2.fits modeM0/AS1A12_077T06_9000005408_38858cztM0_level2_quad_clean.evt
Size (bytes)932,152,320249,007,680
Size889.0 MB 237.5 MB
Events in quadrant A7,607,8971,696,381
Events in quadrant B7,039,2331,734,796
Events in quadrant C7,156,0651,652,156
Events in quadrant D11,522,3011,405,452

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0440
B0440
C0440
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03120
B03120
C03120
D03120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0317095
B0314534
C0309644
D0449054

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15223170.111673%
B15223550.361295%
C15223210.137949%
D1522311787.738291%

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 19758 15226 14 14 0.07% 0.09%
B 19758 15226 23 23 0.12% 0.15%
C 19758 15226 8 8 0.04% 0.05%
D 19758 15226 1072 1072 5.43% 7.04%

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 10 83 1016844 2977.83 1688 1654 340.9
A 9 143 32239 89.71 1688 1654 340.9
A 13 254 24684 67.55 1688 1654 340.9
B 5 184 146486 455.2 1674 1628 318.2
B 4 171 109271 338.25 1674 1628 318.2
B 5 172 77018 236.9 1674 1628 318.2
C 15 214 624666 1628.95 1645 1656 382.5
C 14 254 83798 214.77 1645 1656 382.5
C 0 10 21727 52.48 1645 1656 382.5
D 12 227 2588948 6756.85 1579 1534 382.9
D 2 250 1164022 3035.76 1579 1534 382.9
D 2 249 389640 1013.51 1579 1534 382.9

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