ASTROSAT CZTI

Data Quality Report

Orbit 18226

Creation date: 2024-06-27T17:47:02.517786
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/AS1C04_001T01_9000002716_18226cztM0_level2.evt modeM0/AS1C04_001T01_9000002716_18226cztM0_level2_quad_clean.evt
Size (bytes)556,528,320129,162,240
Size530.7 MB 123.2 MB
Events in quadrant A4,806,693845,758
Events in quadrant B3,505,878902,279
Events in quadrant C3,165,653858,005
Events in quadrant D4,909,628826,520

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187552
B0148502
C0139912
D0191733

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A688369510.097341%
B68831061.540026%
C6883961.394741%
D68823505.085731%

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 7658 6884 474 474 6.19% 6.89%
B 7658 6884 8 8 0.10% 0.12%
C 7658 6884 0 0 0.00% 0.00%
D 7657 6883 220 220 2.87% 3.20%

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 1776879 11214.04 782 766 158.4
A 13 210 9002 52.0 782 766 158.4
A 4 2 8833 50.93 782 766 158.4
B 3 64 220485 1420.06 814 793 154.7
B 7 220 31439 198.09 814 793 154.7
B 0 189 17842 110.2 814 793 154.7
C 14 238 121980 670.89 777 777 180.7
C 7 174 7095 34.97 777 777 180.7
C 3 233 6380 31.01 777 777 180.7
D 5 222 812745 4294.95 780 755 189.1
D 1 52 707512 3738.33 780 755 189.1
D 14 34 108713 571.03 780 755 189.1

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