ASTROSAT CZTI

Data Quality Report

Orbit 00849

Creation date: 2024-06-27T14:03:47.711086
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/AS1P01_156T01_9000000118_00849cztM0_level2.evt modeM0/AS1P01_156T01_9000000118_00849cztM0_level2_quad_clean.evt
Size (bytes)1,163,246,40066,700,800
Size1.1 GB 63.6 MB
Events in quadrant A8,685,309390,081
Events in quadrant B9,136,931387,233
Events in quadrant C8,544,562384,127
Events in quadrant D8,402,803374,388

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0307170
B0320570
C0303350
D0298980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6938570.821562%
B6937590.850512%
C6937690.994666%
D69381211.744018%

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 8823 6938 303 303 3.43% 4.37%
B 8822 6937 375 375 4.25% 5.41%
C 8822 6937 249 249 2.82% 3.59%
D 8823 6938 403 403 4.57% 5.81%

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 15 171 12499 18.71 2259 2281 546.2
A 15 17 8783 11.9 2259 2281 546.2
A 11 79 8277 10.98 2259 2281 546.2
B 2 2 55103 95.81 2345 2362 550.5
B 0 23 24224 39.72 2345 2362 550.5
B 5 249 23665 38.7 2345 2362 550.5
C 15 241 61566 99.24 2146 2226 597.9
C 10 19 29171 45.06 2146 2226 597.9
C 3 111 28007 43.12 2146 2226 597.9
D 10 85 342135 523.7 2101 2185 649.1
D 1 4 71626 106.97 2101 2185 649.1
D 13 169 63940 95.13 2101 2185 649.1

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