ASTROSAT CZTI

Data Quality Report

Orbit 26701

Creation date: 2024-06-27T19:31:54.706037
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/AS1A09_145T01_9000003848_26701cztM0_level2.evt modeM0/AS1A09_145T01_9000003848_26701cztM0_level2_quad_clean.evt
Size (bytes)1,472,702,400252,466,560
Size1.4 GB 240.8 MB
Events in quadrant A7,901,2891,721,746
Events in quadrant B13,034,0661,619,195
Events in quadrant C9,432,9501,643,539
Events in quadrant D13,175,5031,579,926

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0334390
B0489050
C0380350
D0499700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A156731591.014484%
B15673231514.770625%
C156745663.611076%
D1567413528.625750%

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 25568 15676 58 58 0.23% 0.37%
B 25568 15676 1687 1687 6.60% 10.76%
C 25569 15677 253 253 0.99% 1.61%
D 25569 15677 940 940 3.68% 6.00%

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 13 325557 825.08 1927 1897 392.3
A 12 96 140721 353.89 1927 1897 392.3
A 13 254 27189 64.47 1927 1897 392.3
B 0 189 5808076 17324.42 1766 1726 335.2
B 10 246 99867 292.82 1766 1726 335.2
B 5 172 90588 265.14 1766 1726 335.2
C 1 0 1452065 3341.95 1837 1857 433.9
C 14 238 292212 669.11 1837 1857 433.9
C 3 233 262915 601.6 1837 1857 433.9
D 7 80 2860435 6477.49 1808 1763 441.3
D 1 52 2476290 5607.06 1808 1763 441.3
D 2 250 800275 1809.36 1808 1763 441.3

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