ASTROSAT CZTI

Data Quality Report

Orbit 30877

Creation date: 2024-06-27T20:20:40.169582
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/AS1A10_071T49_9000004462_30877cztM0_level2.evt modeM0/AS1A10_071T49_9000004462_30877cztM0_level2_quad_clean.evt
Size (bytes)857,738,88063,146,880
Size818.0 MB 60.2 MB
Events in quadrant A3,785,384415,028
Events in quadrant B14,226,184258,878
Events in quadrant C3,678,300385,152
Events in quadrant D3,834,662386,340

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150062
B0468072
C0146693
D0154412

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66741722.577165%
B6674586387.848367%
C66731842.757380%
D6673650.974075%

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 7829 6675 106 106 1.35% 1.59%
B 7828 6673 5215 5215 66.62% 78.15%
C 7828 6674 62 62 0.79% 0.93%
D 7828 6674 41 41 0.52% 0.61%

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 335476 1867.49 895 880 179.2
A 13 254 12369 64.12 895 880 179.2
A 3 137 8582 42.99 895 880 179.2
B 6 36 10737629 101171.12 558 547 106.1
B 6 159 1196172 11265.88 558 547 106.1
B 0 190 35401 328.41 558 547 106.1
C 0 10 228310 1170.06 835 841 194.4
C 14 238 136671 698.69 835 841 194.4
C 2 16 21570 106.63 835 841 194.4
D 8 195 406993 2025.78 845 826 200.5
D 12 233 111491 551.95 845 826 200.5
D 2 250 85369 421.66 845 826 200.5

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