ASTROSAT CZTI

Data Quality Report

Orbit 18855

Creation date: 2024-06-27T17:55:41.931430
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/AS1T03_094T01_9000002816_18855cztM0_level2.evt modeM0/AS1T03_094T01_9000002816_18855cztM0_level2_quad_clean.evt
Size (bytes)1,646,167,680310,884,480
Size1.5 GB 296.5 MB
Events in quadrant A10,860,6501,992,885
Events in quadrant B11,625,3592,017,698
Events in quadrant C11,230,3731,941,528
Events in quadrant D14,585,2051,882,685

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04680
B04680
C04680
D04680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0473394
B0497184
C0479354
D0591284

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A229811460.635307%
B229823021.314072%
C229822831.231398%
D2298212765.552171%

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 26016 22985 8 8 0.03% 0.03%
B 26017 22986 36 36 0.14% 0.16%
C 26017 22986 2 2 0.01% 0.01%
D 26017 22986 890 890 3.42% 3.87%

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 9 143 85573 147.49 2780 2719 561.8
A 4 2 47725 80.11 2780 2719 561.8
A 13 254 38672 64.0 2780 2719 561.8
B 7 220 353863 666.12 2778 2707 527.2
B 4 216 98869 182.41 2778 2707 527.2
B 12 111 62313 113.07 2778 2707 527.2
C 14 238 413091 658.32 2664 2682 623.4
C 3 233 379462 604.37 2664 2682 623.4
C 0 207 29108 42.39 2664 2682 623.4
D 7 38 1789609 2792.37 2630 2558 640.0
D 9 1 1031389 1607.61 2630 2558 640.0
D 1 52 961339 1498.15 2630 2558 640.0

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