ASTROSAT CZTI

Data Quality Report

Orbit 20170224_T01_157T01_9000001050_level2

Creation date: 2017-09-23T06:18:55.233944
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_157T01_9000001050cztM0_level2.evt modeM0/AS1T01_157T01_9000001050cztM0_level2_quad_clean.evt
Size (bytes)1,587,931,200163,301,760
Size1.5 GB 155.7 MB
Events in quadrant A7,853,8381,035,511
Events in quadrant B7,055,3811,047,473
Events in quadrant C23,916,226906,013
Events in quadrant D8,310,265975,268

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0324770
B0300670
C0808860
D0342400

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02880
B02880
C02880
D02880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A141983472.444006%
B141982872.021411%
C14198527737.167207%
D141985123.606142%

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 15418 14200 22 22 0.14% 0.15%
B 15418 14200 5 5 0.03% 0.04%
C 15418 14200 4633 4633 30.05% 32.63%
D 15418 14200 301 301 1.95% 2.12%

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 13 251 1161353 3358.26 1707 1669 345.3
A 15 234 76027 215.33 1707 1669 345.3
A 3 1 32322 88.76 1707 1669 345.3
B 0 219 110184 330.89 1720 1679 327.9
B 0 229 101644 304.85 1720 1679 327.9
B 0 214 54100 159.86 1720 1679 327.9
C 9 68 11888725 34337.27 1497 1506 346.2
C 9 243 3802220 10978.69 1497 1506 346.2
C 4 254 2108006 6084.81 1497 1506 346.2
D 12 233 537904 1325.6 1651 1603 404.6
D 13 104 326022 801.88 1651 1603 404.6
D 2 152 288777 709.82 1651 1603 404.6

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