ASTROSAT CZTI

Data Quality Report

Orbit 26815

Creation date: 2024-06-27T19:33:16.310104
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_079T01_9000003864_26815cztM0_level2.evt modeM0/AS1A09_079T01_9000003864_26815cztM0_level2_quad_clean.evt
Size (bytes)1,860,024,960185,221,440
Size1.7 GB 176.6 MB
Events in quadrant A7,612,7751,351,544
Events in quadrant B26,264,444857,183
Events in quadrant C6,039,6241,350,569
Events in quadrant D15,570,6111,176,735

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310220
B0866530
C0260770
D0550910

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A125791461.160665%
B12580841866.915739%
C125801501.192369%
D12580266621.192369%

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 13809 12581 8 8 0.06% 0.06%
B 13810 12580 7770 7770 56.26% 61.76%
C 13810 12582 8 8 0.06% 0.06%
D 13810 12582 2127 2127 15.40% 16.91%

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 0 13 1836714 6166.48 1488 1455 297.6
A 4 2 33084 106.27 1488 1455 297.6
A 13 254 20786 64.95 1488 1455 297.6
B 0 189 22321810 127528.81 928 905 175.0
B 3 64 213638 1215.43 928 905 175.0
B 7 205 41124 229.79 928 905 175.0
C 14 238 230970 683.88 1440 1447 335.6
C 15 208 118363 348.36 1440 1447 335.6
C 2 16 73935 215.98 1440 1447 335.6
D 7 80 5540894 17473.38 1336 1303 317.0
D 1 52 3975957 12537.14 1336 1303 317.0
D 2 250 900055 2834.91 1336 1303 317.0

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