ASTROSAT CZTI

Data Quality Report

Orbit 15742

Creation date: 2024-06-27T17:12:54.053039
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_095T01_9000002330_15742cztM0_level2.evt modeM0/AS1T02_095T01_9000002330_15742cztM0_level2_quad_clean.evt
Size (bytes)1,654,332,480230,480,640
Size1.5 GB 219.8 MB
Events in quadrant A19,950,3391,352,842
Events in quadrant B9,229,3881,487,550
Events in quadrant C8,674,1221,451,935
Events in quadrant D11,012,0641,425,181

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0713705
B0395884
C0380034
D0453154

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18314472125.778093%
B183142221.212187%
C183143031.654472%
D183146833.729387%

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 20595 18319 4109 4109 19.95% 22.43%
B 20595 18319 7 7 0.03% 0.04%
C 20595 18319 0 0 0.00% 0.00%
D 20595 18319 472 472 2.29% 2.58%

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 15 239 11979887 29200.03 2036 1988 410.2
A 9 143 149945 360.69 2036 1988 410.2
A 0 226 17744 38.41 2036 1988 410.2
B 4 251 304046 721.19 2192 2136 418.6
B 4 173 105477 246.86 2192 2136 418.6
B 4 216 73056 169.41 2192 2136 418.6
C 14 238 323813 650.0 2118 2133 494.9
C 3 233 50204 97.13 2118 2133 494.9
C 10 22 15525 27.06 2118 2133 494.9
D 1 52 2728330 5190.58 2155 2095 525.2
D 2 234 83605 155.19 2155 2095 525.2
D 10 70 53357 97.6 2155 2095 525.2

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