ASTROSAT CZTI

Data Quality Report

Orbit 20170406_T01_164T01_9000001140_level2

Creation date: 2017-09-23T15:36:35.619300
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/AS1T01_164T01_9000001140cztM0_level2.evt modeM0/AS1T01_164T01_9000001140cztM0_level2_quad_clean.evt
Size (bytes)1,261,725,120234,694,080
Size1.2 GB 223.8 MB
Events in quadrant A9,046,8681,468,922
Events in quadrant B9,764,6231,490,312
Events in quadrant C8,553,9441,479,562
Events in quadrant D9,603,7751,403,778

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390550
B0411180
C0379920
D0413930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A183763281.784937%
B183754352.367347%
C183761390.756421%
D183683191.736716%

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 20917 18392 53 53 0.25% 0.29%
B 20917 18394 58 58 0.28% 0.32%
C 20917 18392 3 3 0.01% 0.02%
D 20917 18392 143 143 0.68% 0.78%

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 8 15 198574 433.78 2233 2191 452.7
A 15 234 155837 339.38 2233 2191 452.7
A 5 16 45413 95.47 2233 2191 452.7
B 10 16 467837 1084.43 2251 2200 429.4
B 11 51 247510 571.31 2251 2200 429.4
B 0 214 172658 396.98 2251 2200 429.4
C 13 61 16598 28.43 2189 2200 506.5
C 3 233 15210 25.69 2189 2200 506.5
C 12 4 10146 15.69 2189 2200 506.5
D 1 52 871490 1633.13 2182 2121 532.3
D 13 105 238945 444.88 2182 2121 532.3
D 8 230 141539 261.9 2182 2121 532.3

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