ASTROSAT CZTI

Data Quality Report

Orbit 24901

Creation date: 2024-06-27T19:11:14.128406
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/AS1A08_003T13_9000003646_24901cztM0_level2.evt modeM0/AS1A08_003T13_9000003646_24901cztM0_level2_quad_clean.evt
Size (bytes)696,150,72087,120,000
Size663.9 MB 83.1 MB
Events in quadrant A4,781,899549,586
Events in quadrant B4,180,750564,626
Events in quadrant C4,130,806531,717
Events in quadrant D7,435,176423,567

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193362
B0174452
C0172272
D0272132

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A81725586.828194%
B81723954.833578%
C81723464.233970%
D8173154118.854766%

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 8657 8175 173 173 2.00% 2.12%
B 8657 8175 6 6 0.07% 0.07%
C 8657 8175 3 3 0.03% 0.04%
D 8658 8176 1253 1253 14.47% 15.33%

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 814103 3890.79 1025 1002 209.0
A 13 254 11862 51.97 1025 1002 209.0
A 4 2 11602 50.72 1025 1002 209.0
B 4 80 74765 368.32 1032 1006 200.3
B 12 111 25608 122.85 1032 1006 200.3
B 7 202 24744 118.54 1032 1006 200.3
C 14 238 157573 670.29 994 997 233.6
C 4 175 43594 182.35 994 997 233.6
C 2 16 31417 130.23 994 997 233.6
D 7 238 3115036 13764.38 926 895 226.2
D 1 52 462822 2041.7 926 895 226.2
D 8 195 345145 1521.57 926 895 226.2

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