ASTROSAT CZTI

Data Quality Report

Orbit 17977

Creation date: 2024-06-27T17:43:23.051751
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/AS1A05_019T01_9000002672_17977cztM0_level2.evt modeM0/AS1A05_019T01_9000002672_17977cztM0_level2_quad_clean.evt
Size (bytes)148,426,56042,575,040
Size141.6 MB 40.6 MB
Events in quadrant A1,071,800296,962
Events in quadrant B1,164,171297,647
Events in quadrant C999,218277,706
Events in quadrant D1,132,164281,997

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A043321
B046801
C040791
D045561

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A1140611186068752140608639336494
B1-1-1
C1-1-1
D1-1-1

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1840211.141304%
B1840261.413043%
C1840140.760870%
D1840321.739130%

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 1840 1840 8 8 0.43% 0.43%
B 1840 1840 13 13 0.71% 0.71%
C 1840 1840 1 1 0.05% 0.05%
D 1840 1840 22 22 1.20% 1.20%

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 15 174 72833 1368.78 259 255 53.0
A 0 226 2318 38.91 259 255 53.0
A 12 194 2047 33.8 259 255 53.0
B 7 220 62599 1249.86 253 248 49.9
B 0 182 56926 1136.14 253 248 49.9
B 0 197 41784 832.61 253 248 49.9
C 14 238 37651 662.67 239 240 56.5
C 3 233 13369 232.56 239 240 56.5
C 0 207 12222 212.24 239 240 56.5
D 7 238 69598 1101.1 249 243 63.0
D 10 70 28804 453.44 249 243 63.0
D 11 176 25540 401.62 249 243 63.0

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