ASTROSAT CZTI

Data Quality Report

Orbit 27855

Creation date: 2024-06-27T19:45:15.328579
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_002T05_9000004024_27855cztM0_level2.evt modeM0/AS1A10_002T05_9000004024_27855cztM0_level2_quad_clean.evt
Size (bytes)649,555,200120,317,760
Size619.5 MB 114.7 MB
Events in quadrant A4,271,386792,614
Events in quadrant B4,432,680777,573
Events in quadrant C4,363,987754,400
Events in quadrant D6,028,358729,270

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181290
B0187790
C0182180
D0237960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A84981151.353260%
B84991702.000235%
C84981822.141680%
D84984515.307131%

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 9088 8503 18 18 0.20% 0.21%
B 9089 8503 16 16 0.18% 0.19%
C 9088 8502 6 6 0.07% 0.07%
D 9088 8502 307 307 3.38% 3.61%

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 6 16 191641 896.91 1047 1021 212.5
A 0 13 16364 72.19 1047 1021 212.5
A 13 254 15347 67.41 1047 1021 212.5
B 0 229 84650 428.13 1030 1002 195.4
B 15 33 65519 330.21 1030 1002 195.4
B 4 52 65086 328.0 1030 1002 195.4
C 3 233 255351 1060.33 1008 1012 239.9
C 14 238 157446 652.17 1008 1012 239.9
C 10 22 23403 93.35 1008 1012 239.9
D 1 52 1759001 7167.81 1007 979 245.3
D 2 250 369271 1501.6 1007 979 245.3
D 2 234 37992 150.91 1007 979 245.3

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