ASTROSAT CZTI

Data Quality Report

Orbit 26087

Creation date: 2024-06-27T19:24:53.889204
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/AS1A09_126T01_9000003772_26087cztM0_level2.evt modeM0/AS1A09_126T01_9000003772_26087cztM0_level2_quad_clean.evt
Size (bytes)518,336,640105,189,120
Size494.3 MB 100.3 MB
Events in quadrant A3,678,873683,405
Events in quadrant B3,835,163688,305
Events in quadrant C3,599,077656,733
Events in quadrant D4,090,714650,838

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154530
B0158060
C0152270
D0168030

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72731662.282414%
B72721852.544004%
C72721922.640264%
D72721962.695270%

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 7678 7273 8 8 0.10% 0.11%
B 7677 7272 4 4 0.05% 0.06%
C 7677 7272 0 0 0.00% 0.00%
D 7676 7271 72 72 0.94% 0.99%

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 5 98 72079 377.47 935 914 188.5
A 13 254 11821 57.85 935 914 188.5
A 3 137 8734 41.48 935 914 188.5
B 15 33 167250 940.83 921 899 176.8
B 12 111 21717 117.74 921 899 176.8
B 0 190 21487 116.44 921 899 176.8
C 14 238 142438 680.73 884 891 207.9
C 3 233 10114 44.36 884 891 207.9
C 2 16 7393 31.27 884 891 207.9
D 1 52 383392 1782.85 901 881 214.6
D 7 80 166368 771.32 901 881 214.6
D 12 1 89165 411.48 901 881 214.6

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