ASTROSAT CZTI

Data Quality Report

Orbit 15420

Creation date: 2024-06-27T17:08:17.740840
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/AS1T02_076T01_9000002274_15420cztM0_level2.evt modeM0/AS1T02_076T01_9000002274_15420cztM0_level2_quad_clean.evt
Size (bytes)672,736,320118,987,200
Size641.6 MB 113.5 MB
Events in quadrant A4,337,853773,922
Events in quadrant B3,974,781784,696
Events in quadrant C4,878,250761,656
Events in quadrant D6,641,653727,058

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182133
B0170532
C0200032
D0252932

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79941511.888917%
B7994831.038279%
C79942162.702027%
D79943564.453340%

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 8675 7997 78 78 0.90% 0.98%
B 8675 7997 14 14 0.16% 0.18%
C 8675 7997 135 135 1.56% 1.69%
D 8675 7997 169 169 1.95% 2.11%

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 364039 1896.19 943 921 191.5
A 14 237 226191 1176.36 943 921 191.5
A 13 248 73462 378.81 943 921 191.5
B 10 245 50820 276.29 947 923 180.6
B 7 220 40745 220.5 947 923 180.6
B 0 219 38074 205.71 947 923 180.6
C 3 233 1327510 6375.02 901 904 208.1
C 10 22 10367 45.47 901 904 208.1
C 8 128 10278 45.05 901 904 208.1
D 13 122 2301106 10381.67 903 874 221.6
D 5 222 602643 2715.97 903 874 221.6
D 2 33 209942 943.59 903 874 221.6

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