ASTROSAT CZTI

Data Quality Report

Orbit 20181

Creation date: 2024-06-27T18:12:07.803812
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/AS1C04_001T01_9000002994_20181cztM0_level2.evt modeM0/AS1C04_001T01_9000002994_20181cztM0_level2_quad_clean.evt
Size (bytes)1,048,579,200213,816,960
Size1000.0 MB 203.9 MB
Events in quadrant A11,076,7731,331,723
Events in quadrant B5,693,3631,495,704
Events in quadrant C6,881,7791,435,094
Events in quadrant D7,331,0791,420,486

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02320
B02320
C02320
D02320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0404502
B0243172
C0278162
D0295442

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11454232520.298586%
B114541701.484198%
C114543022.636633%
D114545885.133578%

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 12785 11457 1824 1824 14.27% 15.92%
B 12785 11457 6 6 0.05% 0.05%
C 12785 11457 1 1 0.01% 0.01%
D 12785 11457 410 410 3.21% 3.58%

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 6167434 24957.53 1237 1210 247.1
A 4 2 137790 552.8 1237 1210 247.1
A 13 254 15513 57.89 1237 1210 247.1
B 0 197 160314 633.13 1356 1324 251.1
B 0 190 64054 249.8 1356 1324 251.1
B 7 220 45044 174.1 1356 1324 251.1
C 3 233 1582927 5247.91 1305 1310 301.4
C 14 238 203529 670.98 1305 1310 301.4
C 13 61 9157 26.04 1305 1310 301.4
D 7 238 1114537 3511.58 1319 1282 317.0
D 9 1 377052 1185.31 1319 1282 317.0
D 15 0 238988 749.81 1319 1282 317.0

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