ASTROSAT CZTI

Data Quality Report

Orbit 20171020_A04_058T01_9000001628_level2

Creation date: 2017-10-27T12:46:37.408536
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A04_058T01_9000001628cztM0_level2.evt modeM0/AS1A04_058T01_9000001628cztM0_level2_quad_clean.evt
Size (bytes)2,004,693,120330,171,840
Size1.9 GB 314.9 MB
Events in quadrant A18,775,1091,975,243
Events in quadrant B14,175,5512,156,205
Events in quadrant C10,422,4132,226,868
Events in quadrant D15,765,9642,034,629

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0560
C0540
D0550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04740
B04780
C04840
D04820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0712720
B0578510
C0479020
D0636040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23241245910.580440%
B233149293.984730%
C234401200.511945%
D232977823.356655%

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 46419 23633 1506 1506 3.24% 6.37%
B 46419 23726 404 404 0.87% 1.70%
C 46419 23828 6 6 0.01% 0.03%
D 46419 23690 453 453 0.98% 1.91%

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 14 238 4572144 8975.97 2542 2485 509.1
A 8 5 2754517 5405.69 2542 2485 509.1
A 8 15 1451069 2845.39 2542 2485 509.1
B 4 239 2729321 5540.17 2681 2615 492.2
B 15 204 242480 487.36 2681 2615 492.2
B 4 80 168045 336.12 2681 2615 492.2
C 5 128 28491 42.79 2655 2668 603.5
C 12 4 19985 28.69 2655 2668 603.5
C 13 61 19810 28.4 2655 2668 603.5
D 10 157 1883494 2877.42 2543 2487 653.7
D 12 16 946624 1444.27 2543 2487 653.7
D 1 52 703127 1071.79 2543 2487 653.7

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