ASTROSAT CZTI

Data Quality Report

Orbit 20959

Creation date: 2024-06-27T18:21:46.214796
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/AS1T03_131T01_9000003090_20959cztM0_level2.evt modeM0/AS1T03_131T01_9000003090_20959cztM0_level2_quad_clean.evt
Size (bytes)710,997,120113,650,560
Size678.1 MB 108.4 MB
Events in quadrant A4,767,565713,599
Events in quadrant B5,144,636733,349
Events in quadrant C4,774,826706,395
Events in quadrant D6,239,957667,357

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01800
B01800
C01800
D01800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0192761
B0205951
C0191371
D0243671

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8962740.825709%
B89611131.261020%
C89611211.350296%
D89612943.280884%

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 11642 8964 27 27 0.23% 0.30%
B 11641 8963 22 22 0.19% 0.25%
C 11641 8963 11 11 0.09% 0.12%
D 11641 8963 191 191 1.64% 2.13%

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 5 16 168539 701.54 1196 1172 238.6
A 0 226 10311 38.31 1196 1172 238.6
A 3 137 9162 33.49 1196 1172 238.6
B 7 220 302200 1355.54 1202 1178 222.1
B 4 216 68421 302.8 1202 1178 222.1
B 0 190 31539 136.72 1202 1178 222.1
C 14 238 184129 687.65 1157 1169 266.1
C 9 54 74036 273.87 1157 1169 266.1
C 7 247 9836 32.57 1157 1169 266.1
D 5 222 685579 2440.17 1155 1123 280.5
D 1 52 492979 1753.53 1155 1123 280.5
D 9 1 445966 1585.92 1155 1123 280.5

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