ASTROSAT CZTI

Data Quality Report

Orbit 00840

Creation date: 2024-06-27T14:03:39.757229
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/AS1P01_165T02_9000000116_00840cztM0_level2.evt modeM0/AS1P01_165T02_9000000116_00840cztM0_level2_quad_clean.evt
Size (bytes)1,175,711,04074,338,560
Size1.1 GB 70.9 MB
Events in quadrant A11,743,294414,446
Events in quadrant B8,430,728468,221
Events in quadrant C7,693,846463,725
Events in quadrant D7,317,892460,510

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0397330
B0295590
C0273680
D0263220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6362198631.216599%
B6361651.021852%
C6358390.613400%
D6362370.581578%

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 7571 6361 2409 2409 31.82% 37.87%
B 7572 6363 468 468 6.18% 7.36%
C 7572 6361 320 320 4.23% 5.03%
D 7572 6363 314 314 4.15% 4.93%

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 15 127 5293256 13246.73 1658 1672 399.5
A 15 171 48662 117.63 1658 1672 399.5
A 0 253 32492 77.15 1658 1672 399.5
B 0 207 147982 299.93 2096 2108 486.4
B 0 220 96202 193.46 2096 2108 486.4
B 7 221 68018 135.51 2096 2108 486.4
C 8 208 47358 85.19 1928 1997 532.5
C 10 34 42239 75.57 1928 1997 532.5
C 3 111 24349 41.98 1928 1997 532.5
D 13 200 131748 226.82 1854 1917 572.4
D 12 22 60959 103.15 1854 1917 572.4
D 12 188 57921 97.84 1854 1917 572.4

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