ASTROSAT CZTI

Data Quality Report

Orbit 20200705_A07_068T01_9000003756_level2

Creation date: 2021-08-15T04:36:49.576631
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/AS1A07_068T01_9000003756cztM0_level2_bc.evt modeM0/AS1A07_068T01_9000003756cztM0_level2_quad_clean.evt
Size (bytes)28,455,716,1608,390,810,880
Size26.5 GB 7.8 GB
Events in quadrant A246,918,12153,663,658
Events in quadrant B141,594,44155,466,588
Events in quadrant C181,551,30251,546,691
Events in quadrant D249,860,53751,292,545

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016633310
B013204850
C014684630
D016710560

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0125360
B0125360
C0125360
D0125380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010550
B010550
C010550
D010550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A616005412736.700108%
B61602189501.452873%
C616015298124.839493%
D616015322745.239158%

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 737957 616006 13525 13525 1.83% 2.20%
B 737957 616030 188 188 0.03% 0.03%
C 737957 616033 10279 10279 1.39% 1.67%
D 737957 616019 11680 11680 1.58% 1.90%

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 116630075 16428.83 33206 32725 7097.1
A 6 16 1783889 246.74 33206 32725 7097.1
A 13 254 817624 110.59 33206 32725 7097.1
B 10 245 6025373 940.58 33901 33113 6370.8
B 0 219 2283284 353.2 33901 33113 6370.8
B 0 190 852187 128.57 33901 33113 6370.8
C 7 87 49736580 6770.49 31477 31369 7341.4
C 3 233 9424076 1279.41 31477 31369 7341.4
C 14 225 484881 61.77 31477 31369 7341.4
D 1 52 64294529 8689.97 32183 31291 7395.1
D 7 80 26929148 3637.25 32183 31291 7395.1
D 7 223 12841740 1732.29 32183 31291 7395.1

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