ASTROSAT CZTI

Data Quality Report

Orbit 16741

Creation date: 2024-06-27T17:27:04.454685
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/AS1A05_202T01_9000002484_16741cztM0_level2.evt modeM0/AS1A05_202T01_9000002484_16741cztM0_level2_quad_clean.evt
Size (bytes)1,191,936,960185,425,920
Size1.1 GB 176.8 MB
Events in quadrant A11,185,0141,102,171
Events in quadrant B5,648,0611,298,202
Events in quadrant C5,603,1561,250,044
Events in quadrant D12,881,5841,163,359

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410843
B0242842
C0239252
D0463692

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02340
B02340
C02340
D02340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11584231319.967196%
B115841311.130870%
C115841441.243094%
D11584117210.117403%

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 13135 11587 1871 1871 14.24% 16.15%
B 13135 11587 20 20 0.15% 0.17%
C 13135 11587 1 1 0.01% 0.01%
D 13135 11586 922 922 7.02% 7.96%

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 15 174 6524661 26874.5 1211 1183 242.7
A 0 226 10801 39.62 1211 1183 242.7
A 12 194 8969 32.08 1211 1183 242.7
B 15 35 120139 461.01 1358 1321 257.7
B 5 236 61005 231.57 1358 1321 257.7
B 0 189 47787 180.29 1358 1321 257.7
C 14 238 202428 660.56 1312 1317 304.5
C 0 207 152982 498.15 1312 1317 304.5
C 7 247 99179 321.43 1312 1317 304.5
D 1 52 5944189 19334.1 1276 1239 307.4
D 2 16 1211655 3937.83 1276 1239 307.4
D 10 70 291875 945.52 1276 1239 307.4

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