ASTROSAT CZTI

Data Quality Report

Orbit 20161024_A02_197T01_9000000748_level2

Creation date: 2025-11-07T03:28:22.510153
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/AS1A02_197T01_9000000748cztM0_level2.fits modeM0/AS1A02_197T01_9000000748cztM0_level2_quad_clean.evt
Size (bytes)136,488,960110,082,240
Size130.2 MB 105.0 MB
Events in quadrant A798,912582,658
Events in quadrant B790,856596,341
Events in quadrant C800,274572,796
Events in quadrant D690,008527,179

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0373030
B0312070
C0312210
D0321660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03120
B03120
C03120
D03120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A152681160.759759%
B15265630.412709%
C15266710.465086%
D15270690.451866%

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 18031 15271 0 0 0.00% 0.00%
B 18031 15271 0 0 0.00% 0.00%
C 18031 15271 0 0 0.00% 0.00%
D 18031 15271 0 0 0.00% 0.00%

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 29 803 11.01 207 194 55.3
A 14 188 757 10.18 207 194 55.3
A 14 204 730 9.69 207 194 55.3
B 2 9 665 10.45 208 197 44.8
B 12 226 599 8.98 208 197 44.8
B 14 254 553 7.95 208 197 44.8
C 1 80 604 7.07 211 196 57.7
C 1 81 603 7.06 211 196 57.7
C 12 241 557 6.26 211 196 57.7
D 11 82 515 6.15 196 178 54.8
D 3 14 505 5.97 196 178 54.8
D 6 231 500 5.88 196 178 54.8

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