ASTROSAT CZTI

Data Quality Report

Orbit 21923

Creation date: 2024-06-27T18:34:00.821952
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/AS1A07_100T03_9000003242_21923cztM0_level2.evt modeM0/AS1A07_100T03_9000003242_21923cztM0_level2_quad_clean.evt
Size (bytes)839,920,320202,671,360
Size801.0 MB 193.3 MB
Events in quadrant A5,393,3671,355,724
Events in quadrant B5,894,3481,370,090
Events in quadrant C5,381,1021,334,378
Events in quadrant D7,982,9161,276,083

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0237482
B0249802
C0236382
D0316132

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02360
B02360
C02360
D02360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11598820.707018%
B115991571.353565%
C115991140.982843%
D115997216.216053%

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 13148 11598 15 15 0.11% 0.13%
B 13149 11599 68 68 0.52% 0.59%
C 13149 11599 7 7 0.05% 0.06%
D 13149 11599 634 634 4.82% 5.47%

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 4 2 136568 492.33 1360 1329 274.7
A 13 254 20304 69.08 1360 1329 274.7
A 0 226 11662 37.62 1360 1329 274.7
B 3 64 361936 1415.56 1349 1314 254.8
B 0 197 97291 376.74 1349 1314 254.8
B 6 36 55967 214.53 1349 1314 254.8
C 14 238 208515 683.32 1304 1311 303.2
C 10 22 91713 298.13 1304 1311 303.2
C 13 61 9140 25.82 1304 1311 303.2
D 1 52 2450137 7902.69 1286 1247 309.9
D 12 235 331317 1065.15 1286 1247 309.9
D 2 136 87462 278.22 1286 1247 309.9

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